Image Tools
Edit, compress, resize, and convert your images
Batch Photo Editor
Crop multiple photos at once with the same aspect ratio. Interactive overlays, social media presets, download as ZIP.
- Up to 30 photos
- Social media presets
- Shows output dimensions
- ZIP download
Image Compressor
Compress images to reduce file size while maintaining quality. Works entirely in your browser - files never leave your device.
- Quality slider
- Before/after size
- Drag & drop
- No upload to servers
Image Resizer
Resize images to any dimension with social media presets and aspect ratio lock. Fast and free.
- Custom dimensions
- Aspect ratio lock
- Social media presets
- Instant preview
Image Format Converter
Convert images between PNG, JPG, and WebP formats. Adjust quality and preview results instantly.
- PNG, JPG, WebP
- Quality control
- Instant preview
- No upload needed
Background Remover
Remove image backgrounds instantly with AI. Works entirely in your browser — your images never leave your device.
- AI-powered
- Transparent PNG output
- Drag & drop
- Privacy-first
Image to Text (OCR)
Extract text from images and PDFs using OCR. Supports 7 languages. Runs entirely in your browser — your files stay private.
- Images & PDF
- 7 languages
- Client-side OCR
- Privacy-first
Image Upscaler
Upscale images 2x or 4x with AI super-resolution. Enhance resolution while preserving quality, entirely in your browser.
- AI super-resolution
- 2x & 4x upscaling
- Before/after preview
- Privacy-first
Image Mosaic
Apply mosaic pixelation effects to images for privacy and censoring. Process multiple images at once with adjustable block size.
- Bulk processing
- Region selection
- Adjustable block size
- ZIP download
HEIC to JPG Converter
Convert HEIC and HEIF photos from iPhone into universally compatible JPG or PNG images, with batch processing and adjustable quality. All processing happens in your browser — your files never leave your device.
- Batch conversion
- JPG & PNG output
- ZIP download
- Privacy-first
Image Cropper
Crop any image right in your browser with a draggable, resizable crop box, aspect ratio presets like 1:1 and 16:9, and exact pixel controls. All processing happens client-side — your files never leave your device.
- 8-handle drag-and-resize crop box
- 1:1, 4:3, 3:2, 16:9, 9:16 presets
- Exact pixel X/Y/width/height inputs
- Privacy-first
Image Rotator
Batch rotate up to 20 images with automatic EXIF orientation correction, precise angle control, and instant downloads.
- Batch rotate & flip
- Fine-angle straightening
- Auto EXIF fix
- Privacy-first
EXIF Remover
Batch-view EXIF metadata for up to 20 photos — including a red warning if GPS location is found — then strip it all with one click. All processing happens in your browser.
- Batch EXIF viewer
- GPS location detector
- One-click metadata removal
- Privacy-first
Image Watermark
Stamp your photos with a custom text or logo watermark, choosing position, size, rotation, and opacity for the whole batch. All processing happens client-side — your images never leave your device.
- Text or logo watermarks
- Batch processing up to 20 images
- 9-point position or tiled pattern
- Privacy-first
Circle Crop
Crop any photo into a clean circular avatar with drag-to-reposition and zoom-to-frame controls. Export as transparent PNG or flattened JPG with an optional border. All processing happens client-side — your files never leave your device.
- Drag & zoom framing
- Transparent PNG or JPG
- Optional border ring
- Privacy-first
Meme Generator
Upload any photo and add classic bold, outlined meme text on top, middle, and bottom captions with adjustable size. All processing happens locally in your browser — your image is never uploaded to a server.
- Classic bold meme text
- Top, middle & bottom captions
- No watermark, no signup
- Privacy-first
Collage Maker
Arrange 2 to 9 photos into a custom grid collage with adjustable spacing, background color, and rounded corners — all processed locally in your browser.
- 7 grid layouts
- Swap photos with a click
- Adjustable spacing & style
- Privacy-first
Image Splitter
Split any photo into a custom grid — from a 3×3 Instagram post to a wide 3×1 banner — with square cropping and Instagram posting order built in. All processing happens client-side — your files never leave your device.
- Custom grid up to 6×6, plus 3×1, 3×3, 2×2 presets
- One-click square crop for Instagram
- Instagram posting order numbering
- Privacy-first
Color Palette Extractor
Analyze an image with median-cut quantization to pull out its dominant color palette, then sample exact pixels with an eyedropper and export CSS, JSON, or Tailwind code. All processing happens client-side — your image never leaves your device.
- Median-cut palette extraction
- Eyedropper pixel picker
- CSS/JSON/Tailwind export
- Privacy-first
Image Combiner
Combine 2–10 images into a single photo, horizontally or vertically, with automatic size matching. Everything runs locally in your browser — no uploads.
- Horizontal & vertical stitching
- Auto size matching
- Custom gap & background
- Privacy-first
GIF Maker
Combine 2 to 50 photos into a smooth, looping animated GIF with custom timing, sizing, and fit. Everything is encoded locally in your browser — your photos are never uploaded.
- Up to 50 frames
- Custom frame delay
- Reorder & remove frames
- Privacy-first
GIF Optimizer
Reduce animated GIF file size by adjusting width, frame rate, and color count with two-pass palette encoding. Compare the before and after side by side — everything runs locally, so your GIF is never uploaded.
- Custom width, FPS & colors
- Two-pass palette encoding
- Before/after size comparison
- Privacy-first
GIF Splitter
Split an animated GIF into individual PNG frames you can preview, download one at a time, or export together as a ZIP. Everything runs locally in your browser — your GIF is never uploaded.
- Extracts every frame as PNG
- Thumbnail grid preview
- Per-frame or ZIP download
- Privacy-first
GIF Speed Changer
Change the playback speed of any animated GIF with presets or a fine slider, then compare original and result side by side — all in your browser.
- 0.25x–4x speed presets
- Two-pass palette for sharp colors
- Side-by-side preview
- Privacy-first
Add Text to GIF
Add captions, memes, or text overlays to any animated GIF with control over position, size, color, and opacity. Works entirely in your browser — your files never leave your device.
- 9-point text placement
- CJK-safe text wrapping
- Classic meme style
- Client-side processing
Image to Base64
Encode an image to raw Base64, a data URI, CSS, HTML, or Markdown, or decode a Base64 string back into a downloadable image. All processing happens client-side; your files never leave your device.
- 5 output formats
- Decode Base64 to image
- Size & overhead shown
- Privacy-first
Add Border to Image
Add a solid, coloured, or transparent border around any photo, square it up for Instagram, and batch-process multiple images at once. Everything runs locally in your browser — your photos are never uploaded to a server.
- Batch Processing
- Custom Border Width
- Transparent Border Option
- Privacy-first
Image Filters
Fine-tune brightness, contrast, saturation, hue, grayscale, sepia, invert, opacity, and blur, or apply one of nine ready-made presets like Vintage, Cool, or Dramatic. Compare before and after, then export a single photo or batch-process an entire folder as a ZIP. Everything runs locally in your browser — your photos are never uploaded to a server.
- 9 One-Click Presets
- 9 Fine-Tuned Sliders
- Batch Processing with ZIP
- Privacy-first
Blur Image
Blur or pixelate an entire photo, or switch to selective mode and draw rectangle or ellipse regions over faces, license plates, screens, or any other sensitive detail. Set an independent effect type and strength for the whole image or for each region, then batch-process multiple photos and export them together as a ZIP. Everything runs locally in your browser — your photos are never uploaded to a server.
- Whole-Image or Selective Blur
- Rectangle & Ellipse Regions
- Batch Processing with ZIP
- Privacy-first
Round Image Corners
Round the corners of any photo with a transparent or flat-colour background, control each corner independently, and batch-process multiple images at once. Everything runs locally in your browser — your photos are never uploaded to a server.
- Adjustable Corner Radius
- Per-Corner Control
- Batch Processing
- Privacy-first
PDF Tools
Merge, split, compress, and organize PDF documents
PDF & Image Merger
Merge PDF files and images (PNG, JPG, WebP) into one document. Reorder and combine instantly in your browser.
- PDFs & images
- PNG, JPG, WebP support
- Reorder files
- Privacy-first
PDF Compressor
Compress PDF files to your desired maximum size. Set a target in MB or KB and download instantly.
- Target file size
- Smart compression
- MB & KB units
- Privacy-first
PDF Organizer
Rearrange, rotate, and delete pages from your PDF documents. Visual thumbnails make it easy to organize.
- Page thumbnails
- Rotate pages
- Delete pages
- Privacy-first
PDF Splitter
Split PDF files into individual pages or extract specific page ranges. Download as PDF or ZIP.
- Custom ranges
- Fixed interval split
- Extract pages
- Merge option
Image to PDF
Convert multiple images (PNG, JPG, WebP) into a single PDF document. Preview, rotate, and reorder images before converting.
- Image preview
- Rotate images
- Reorder pages
- Privacy-first
Webpage to PDF
Capture browser tab screenshots and merge them into a single PDF document. No backend needed.
- Screen capture
- One-click capture
- Reorder pages
- Instant PDF merge
PDF to Image
Convert PDF pages to high-quality PNG or JPG images. Choose resolution and export individual pages or all as ZIP.
- PNG & JPEG output
- Up to 300 DPI
- Page selection
- ZIP download
PDF Redactor
Draw redaction boxes over sensitive text, images, or data in your PDF. Apply black or white redactions and download.
- Draw redaction boxes
- Black or white color
- Page navigation
- Privacy-first
Rotate PDF
Rotate all pages at once or individual pages one at a time, then download the corrected PDF instantly. Live thumbnail previews show exactly how each page will look before you save.
- One-click rotate all
- Per-page rotation
- Instant preview
- Privacy-first
Remove PDF Pages
Click pages to mark them for deletion, or type ranges like '2, 5-7' to select many at once, then download a new PDF without them. All processing happens locally in your browser — your files never leave your device.
- Click to mark pages
- Range input (2, 5-7)
- Live page thumbnails
- Privacy-first
Extract PDF Pages
Select exactly the pages you need from any PDF and export them as one combined PDF or as separate files in a ZIP. All processing happens locally in your browser — your files are never uploaded.
- Page thumbnails
- Range selection
- Combine or ZIP export
- Privacy-first
PDF Watermark
Add a custom text watermark like CONFIDENTIAL, DRAFT, or your company name to every page of your PDF, with full control over size, color, opacity, and rotation. All processing happens locally in your browser — your files are never uploaded to a server.
- Custom Text & Color
- Adjustable Opacity
- Single or Tiled Layout
- Privacy-first
PDF Page Numbers
Stamp page numbers onto every page of your PDF with full control over position, format, and starting number. All processing happens client-side — your files never leave your device.
- 6 placement options
- 3 number formats
- Skip cover pages
- Privacy-first
PDF to Text
Instantly extract the text layer from any PDF — resumes, contracts, ebooks, and more — right in your browser. Your files are never uploaded; everything happens locally on your device.
- Extracts all pages
- Live word count
- Copy or download .txt
- Privacy-first
Crop PDF
Crop PDF pages by setting precise margins or dragging a selection directly on the preview, then apply the change to every page or just the ones you choose. All processing happens locally in your browser, so your files are never uploaded to a server.
- Margin or drag-select cropping
- mm & pt units
- Apply to page ranges
- Privacy-first
Flatten PDF
Convert fillable form fields and annotations into permanent, non-editable content. Detects what's flattenable, flattens with one click, and never uploads your file.
- Detects fields & annotations
- One-click flattening
- Optional annotation removal
- Privacy-first
PDF Metadata Editor
See and edit the hidden Title, Author, Subject, Keywords, and Creator fields in any PDF, or wipe everything in one click. All processing happens locally in your browser — your file is never uploaded.
- View & edit metadata
- Clear all in one click
- Before/after diff
- Privacy-first
TXT to PDF
Convert plain text or Markdown notes into a clean, properly formatted PDF with custom page size, font, and spacing. All processing happens client-side — your files never leave your device.
- Multi-file merging
- Custom page size & margins
- Automatic word-wrap
- Privacy-first
PDF Overlay
Overlay a letterhead, watermark, or stamp PDF onto the pages of another document — choose which pages, whether it sits on top or behind your content, and how opaque it is. Everything runs locally in your browser; your files are never uploaded.
- Custom page range
- Layer order control
- Adjustable opacity
- Privacy-first
Resize PDF
Resize PDF pages to standard sizes like A4 and US Letter, or set a custom size in millimeters. Preview the result before downloading, right in your browser.
- A4 ↔ Letter presets
- Custom mm size
- Fit or fill scaling
- Privacy-first
Extract Images from PDF
Extract every embedded photo, logo, and picture from your PDF and save them as PNG files. All processing happens client-side — your files never leave your device.
- Extracts real embedded images
- Skips tiny icons automatically
- Download all as ZIP
- Privacy-first
PDF Repair
Diagnoses PDF corruption and rebuilds the file using a three-stage recovery pipeline, recovering pages even from severely damaged files. Everything runs locally in your browser — your files are never uploaded.
- Fixes broken PDF structure
- Recovers unreadable files
- Works with empty-password encryption
- Privacy-first
Sign PDF
Sign PDF documents with a drawn, typed, or uploaded signature you can drag, resize, and place exactly where you need it — no account required; everything happens locally in your browser.
- Draw, type, or upload your signature
- Drag and resize placement on any page
- Apply to one page or the whole document
- Privacy-first
PDF to Grayscale
Rasterize every page of your PDF into perceptual grayscale images and rebuild a new document, ideal for cheaper printing and smaller color-heavy files. Everything happens locally in your browser — your PDF is never uploaded to a server.
- Perceptual grayscale
- Adjustable DPI & quality
- Preserves page size
- Privacy-first
Multiple Pages Per Sheet
Arrange 2, 4, 6, 9, or 16 source pages onto each output sheet with adjustable orientation, paper size, margins, and reading order. Pages are embedded as real PDF content, so text stays selectable. All processing happens client-side — your files never leave your device.
- 2, 4, 6, 9, or 16 pages per sheet
- Selectable, vector text — not flattened images
- Custom margins, gaps, and reading order
- Privacy-first
Split PDF Pages in Half
Split each page of a scanned PDF into two — left/right or top/bottom — with a draggable split line and custom reading order. All processing happens client-side; your files never leave your device.
- Draggable split line
- Left-to-right or right-to-left order
- Skip cover page
- Privacy-first
Add Header and Footer to PDF
Add header and footer text — page numbers, dates, filenames, or custom labels — to any PDF, with six placement slots, adjustable font size, color, and margin, all previewed live before you download.
- Six header and footer text slots
- Live preview with overflow warnings
- Dynamic placeholders like page number and date
- Privacy-first
Video Tools
Edit, resize, and trim your videos
Video Resizer
Resize video dimensions to any size with social media presets and aspect ratio lock. All processing in your browser — your files never leave your device.
- Social media presets
- Aspect ratio lock
- Custom dimensions
- Client-side processing
Video Trimmer
Trim video clips with a visual timeline and frame-accurate preview. Fast stream-copy cutting — no re-encoding. Works entirely in your browser.
- Visual timeline
- Frame preview
- Fast stream copy
- Client-side processing
Video to GIF
Trim any part of a video and convert it into a smooth, optimized animated GIF with adjustable frame rate and width. Works entirely in your browser — your files never leave your device.
- Trim start & end
- Adjustable FPS & size
- High-quality palette
- Client-side processing
GIF to Video
Turn animated GIFs into compact MP4 or WebM video files with adjustable quality, right in your browser — see the file size savings before you download.
- MP4 & WebM output
- Automatic even-dimension scaling
- Adjustable quality & repeat count
- Privacy-first
Video Merger
Fuse up to 10 video clips into a single file directly in your browser. Reorder clips, preview the result, and download — with automatic re-encoding if formats don't match. No uploads required.
- Up to 10 videos
- Drag-free reordering
- Smart re-encode fallback
- Privacy-first
Video Compressor
Compress MP4, WebM, and MOV videos directly in your browser. Choose a quality preset, cap the resolution, and pick an encoding speed — then compare before and after sizes. No uploads required.
- 3 quality presets
- Resolution & speed control
- Before/after comparison
- Privacy-first
Video to MP3
Pull the audio track out of MP4, WebM, or MOV videos and download it as MP3, WAV, or M4A. Pick a bitrate, trim to a time range, and convert entirely in your browser — no upload, no signup.
- MP3 / WAV / M4A export
- Adjustable bitrate
- Time range extraction
- Privacy-first
Video Speed Changer
Change your video's playback speed from 0.25x slow motion to 4x fast forward, with pitch-preserving audio powered by FFmpeg's atempo filter. Everything happens locally in your browser.
- 0.25x-4x speed range
- Pitch-preserving audio
- Remove audio option
- Privacy-first
Video Cropper
Trim the frame of your video to any size or aspect ratio with a simple drag-and-resize crop box. All processing happens locally in your browser — your video is never uploaded.
- Draggable crop box
- Aspect ratio presets
- Exact pixel input
- Privacy-first
Video Rotator
Fix a sideways video or spin it to the orientation you need, with an option to reset embedded rotation metadata. All processing happens locally in your browser — your video is never uploaded.
- 90°/180° rotation
- Live rotation preview
- Metadata reset option
- Privacy-first
Video Flipper
Flip any video horizontally, vertically, or both using ffmpeg running entirely in your browser via WebAssembly. Perfect for fixing mirrored front-camera selfie clips. Your video is processed locally and never uploaded to a server.
- Horizontal, vertical & combined flip
- Instant live preview
- Audio preserved automatically
- Privacy-first
Video Looper
Loop any video clip by repeating it 2-10 times or to a target duration, using ffmpeg's concat demuxer for an exact, lossless stream copy — no re-encoding. Everything runs locally in your browser and your video is never uploaded to a server.
- Lossless stream-copy looping
- Target-duration auto calculation
- Size & duration estimate before you run
- Privacy-first
Video Reverser
Reverse video and audio playback right in your browser — no upload, no watermark.
- Reverse video & audio
- Range mode for long clips
- Mute reversed audio
- Privacy-first
Video Format Converter
Convert video formats in your browser with instant remux when possible — no upload required.
- MP4, WebM & MKV
- Instant remux when possible
- Adjustable quality
- Privacy-first
Video Frame Grabber
Grab still images from any video directly in your browser. Scrub to an exact moment for one high-quality frame, or extract a whole batch automatically at a set interval or count — then download individually or as a ZIP.
- Single & batch frame capture
- PNG or JPG output
- ZIP download for batch frames
- Privacy-first
Remove Audio from Video
Remove the audio track from MP4, WebM, and MOV videos directly in your browser using a stream copy — the video is never re-encoded, so it's near-instant and completely lossless. No uploads required.
- Lossless stream copy
- Instant processing
- Detects already-silent video
- Privacy-first
Screen Recorder
Capture your screen, a window, or a tab with optional system and microphone audio — recorded entirely in your browser.
- Record screen, window, or tab
- Optional system + mic audio
- Pause & resume recording
- Privacy-first
Webcam Recorder
Preview your webcam live, pick a camera, microphone, and resolution, then record with an optional countdown — entirely in your browser.
- Live camera preview
- Camera, mic & resolution pickers
- Optional 3-2-1 countdown
- Privacy-first
Audio Tools
Cut, convert, and enhance audio right in your browser
Audio Cutter
Cut or trim MP3, WAV, M4A, OGG, and FLAC files by dragging an interactive waveform, then export as WAV or MP3. All processing happens locally in your browser — your audio is never uploaded.
- Waveform trimming
- Keep or remove selection
- WAV or MP3 export
- Privacy-first
Audio Joiner
Merge 2 to 10 MP3, WAV, M4A, OGG, or FLAC files into a single track, reorder them, and add smooth crossfades. All processing happens locally in your browser — your audio is never uploaded.
- Reorder clips
- Equal-power crossfade
- WAV or MP3 export
- Privacy-first
Audio Converter
Convert audio between MP3, WAV, M4A, OGG, and FLAC with custom bitrate, sample rate, and channels — batch up to 10 files at once. All processing happens client-side — your files never leave your device.
- MP3, WAV, M4A, OGG & FLAC
- Batch up to 10 files
- Custom bitrate & sample rate
- Privacy-first
Audio Volume Changer
Turn audio up or down manually, or normalize it automatically to a target peak level, with a live waveform preview and honest clipping detection. All processing happens client-side — your file never leaves your device.
- Manual gain -30 to +30 dB
- One-click normalize
- Live waveform & clipping check
- Privacy-first
Audio Speed Changer
Change playback speed from 0.25x to 4x with pitch-preserving tempo or the classic tape-speed effect. Export as WAV or MP3, entirely in your browser.
- 0.25x-4x speed range
- Pitch-preserving or tape effect
- WAV or MP3 export
- Privacy-first
Audio Pitch Changer
Shift pitch from -12 to +12 semitones while keeping duration exact, using FFmpeg's asetrate/atempo technique. All in your browser.
- -12 to +12 semitone range
- Duration stays unchanged
- Frequency ratio shown
- Privacy-first
Audio Reverser
Upload an MP3, WAV, M4A, OGG, or FLAC file and reverse it instantly — entirely in your browser. Your audio is never uploaded.
- Reverse whole file or a range
- Before/after waveform preview
- WAV & MP3 export
- Privacy-first
Voice Recorder
Record straight from your microphone with a live level meter and pause/resume controls, then export as MP3 or WAV — entirely in your browser.
- Live input level meter
- Pause & resume recording
- MP3 & WAV export
- Privacy-first
Audio Waveform Generator
Decode audio in your browser and render a fully customizable waveform image — bars, filled, line, or mirrored style — with custom colors and dimensions. Export as PNG (with optional transparency) or a true vector SVG. All processing is client-side.
- 4 waveform styles
- Vector SVG export
- Transparent PNG background
- Privacy-first
BPM and Key Detector
Estimates tempo via a beat-interval histogram and musical key via chroma analysis correlated against Krumhansl-Schmuckler profiles — showing confidence-ranked candidates instead of one overconfident answer, plus a tap-tempo cross-check. All analysis happens in your browser.
- Top 3 BPM candidates
- Chroma-based key detection
- Tap-tempo cross-check
- Privacy-first
Generators & Utilities
Create QR codes, passwords, and analyze text
QR Code Generator
Create custom QR codes for URLs, text, and more. Download as PNG or SVG. Customize colors and sizes.
- Custom colors
- PNG & SVG export
- Multiple sizes
- No signup required
Password Generator
Generate strong, secure passwords with customizable length, characters, and strength indicator.
- Strength indicator
- Custom characters
- Copy to clipboard
- Cryptographically secure
Word Counter
Count words, characters, sentences, and paragraphs. Get reading time estimates and keyword density.
- Real-time counting
- Reading time
- Keyword density
- Speaking time
Chinese Calendar
View today's Huangli (黄历) with lunar date, auspicious activities (宜), and things to avoid (忌). Traditional Chinese almanac.
- Lunar calendar
- Yi/Ji activities
- Five elements
- Zodiac info
JSON Formatter
Format, minify, and validate JSON data instantly. Beautify with custom indentation or compress to save space.
- Prettify & minify
- Validation
- Custom indentation
- Privacy-first
Favicon Generator
Generate a complete favicon package — favicon.ico, every PNG size, and a ready-to-use manifest — from an uploaded image, typed initials, or an emoji in seconds. All processing happens client-side — your files never leave your device.
- Full favicon package (ICO + 6 PNG sizes)
- Upload, text, or emoji source
- Live browser-tab preview
- Privacy-first
Base64 Encoder/Decoder
Convert text and files to Base64 or decode Base64 back to plain text, with a URL-safe mode for embedding in links and filenames. All conversion happens locally in your browser — nothing is uploaded to a server.
- UTF-8 safe
- URL-safe mode
- File to Base64
- Privacy-first
URL Encoder/Decoder
Encode or decode URLs, query parameters, and form values using encodeURIComponent or full-URL rules. All processing happens locally in your browser — nothing is ever sent to a server.
- Component & full-URL modes
- Percent-encoding
- Live conversion
- Privacy-first
Hash Generator
Compute MD5, SHA-1, SHA-256, and SHA-512 hashes for any text or file, verify checksums against an expected value, and copy results with one click. All processing happens locally in your browser — your files and text never leave your device.
- MD5, SHA-1, SHA-256 & SHA-512
- Hash text or files up to 200MB
- Compare against an expected hash
- Privacy-first
UUID Generator
Create cryptographically secure version 4 UUIDs with options for uppercase, no hyphens, or a quoted list-ready format — generate one instantly or up to 100 at once. All UUIDs are generated locally in your browser and never sent to a server.
- Cryptographically secure v4 UUIDs
- Generate up to 100 at once
- Uppercase, no-hyphens & quoted formats
- Privacy-first
JWT Decoder
Paste any JSON Web Token to decode its header and payload as readable JSON, review standard claims like issuer and expiry, and see a clear warning that decoding is not the same as verifying. All processing happens client-side — your token never leaves your device.
- Instant decoding
- Expiry check
- Claims summary
- Privacy-first
Diff Checker
Paste an original and a changed version of any text or code to get an accurate line-based diff, viewable as a unified or side-by-side comparison with added/removed stats. All comparison runs locally in your browser — nothing is ever uploaded.
- LCS-based diff
- Unified & side-by-side
- Ignore case/whitespace
- Privacy-first
Regex Tester
Write a JavaScript regex pattern, test it against real text, and see every match highlighted instantly. Inspect capture groups and preview find-and-replace with $1 or $<name>. All processing happens client-side — your patterns never leave your device.
- Live match highlighting with capture groups
- Full g/i/m/s/u flag support
- Find-and-replace preview with $1/$<name>
- Privacy-first
Timestamp Converter
Convert between Unix time and human-readable dates instantly. Watch the current epoch time tick live, auto-detect seconds vs. milliseconds, and get local time, UTC, and relative time for any timestamp. All processing happens client-side — your data never leaves your device.
- Live-ticking current Unix time
- Auto seconds/milliseconds detection
- Local time, UTC, and relative time
- Privacy-first
Lorem Ipsum Generator
Instantly create classic Lorem Ipsum placeholder text for your mockups and designs, with optional HTML tags.
- Paragraphs, sentences, or words
- Optional HTML <p> tags
- Classic Latin word bank
- Privacy-first
Case Converter
Paste your text and instantly get ten case styles at once: UPPERCASE, lowercase, Title Case, camelCase, snake_case, and more.
- 10 case styles at once
- Understands camelCase & snake_case
- One-click copy per row
- Privacy-first
JSON to CSV Converter
Convert JSON arrays of objects into CSV spreadsheets, or CSV files back into JSON, with automatic flattening of nested data. All conversion runs locally in your browser, so your data is never uploaded to a server.
- Bidirectional conversion
- Nested object flattening
- Auto delimiter detection
- Privacy-first
YAML to JSON Converter
Convert YAML configuration files to JSON, or JSON back to YAML, with support for multi-document YAML and detailed parse error locations. All conversion runs locally in your browser, so your data is never uploaded to a server.
- Bidirectional conversion
- Multi-document YAML support
- Custom indentation
- Privacy-first
XML Formatter
Pretty-print nested XML with configurable indentation, minify to save space, or validate well-formedness with clear error messages. Comments, CDATA, and attributes are always preserved. Runs entirely in your browser.
- Format & minify XML
- Well-formedness validation
- Preserves comments & CDATA
- Privacy-first
SQL Formatter
Live-format SQL as you type with support for SQL, MySQL, PostgreSQL, SQLite, T-SQL, and BigQuery dialects. Choose keyword casing and indentation, or collapse to a compact single line. Runs entirely in your browser.
- Live SQL formatting
- 6 dialects supported
- Keyword case & indent control
- Privacy-first
HTML Entities Encoder/Decoder
Convert special characters to safe HTML entities or decode them back to plain text — all processing happens client-side, so your content never leaves your device.
- Encode & decode instantly
- Named, decimal & hex entities
- Non-ASCII numeric mode
- Privacy-first
Markdown Preview
Edit Markdown with GitHub-flavored syntax and see a live, sanitized HTML preview as you type — entirely in your browser, with raw HTML export when you need it.
- Live GFM preview
- Sanitized HTML output
- Raw HTML export
- Privacy-first
Color Converter
Convert any CSS color to HEX, RGB, HSL, and HWB instantly, adjust alpha, and check WCAG contrast — all in your browser.
- HEX/RGB/HSL/HWB conversion
- Alpha slider & color picker
- WCAG contrast checker
- Privacy-first
Cron Expression Parser
Parse any 5- or 6-field cron expression into a human-readable schedule, preview the next 5 run times, and inspect each field.
- Plain-English description
- Next 5 run times
- 5/6-field support
- Privacy-first
Slug Generator
Paste a title or sentence and get an SEO-friendly URL slug in your browser — choose a separator, cap the length, or convert a whole list in bulk. Nothing is uploaded; conversion happens entirely on your device.
- Unicode-aware accent handling
- Dash or underscore separators
- Bulk mode for entire lists
- Privacy-first
Number Base Converter
Enter a number and see it instantly converted to binary, octal, decimal, hexadecimal, and a custom base of your choice, powered by BigInt for arbitrary precision. Supports negative numbers and 0x/0b/0o auto-detection. All processing happens client-side — your numbers never leave your device.
- Arbitrary precision via BigInt
- Auto-detects 0x/0b/0o prefixes
- Custom bases from 2 to 36
- Privacy-first
Text Encryption
Protect any message with AES-256-GCM encryption using a passphrase you control. All encryption and decryption happens locally — your text never leaves your device.
- AES-256-GCM encryption
- PBKDF2 key derivation
- Passphrase strength meter
- Privacy-first
TOTP Code Generator
Compute RFC 6238-compliant TOTP codes from any Base32 2FA secret with configurable digits, period, and algorithm. Everything runs locally — your secret never leaves your device.
- RFC 6238 TOTP
- SHA-1/256/512 support
- Live countdown ring
- Privacy-first
Phone Number Parser
Parse any phone number into E.164, international, and national formats, detect its country and line type, and validate it against real carrier numbering plans — entirely in your browser.
- Detects country & calling code
- E.164, international & national formats
- Identifies mobile, landline & VoIP
- Privacy-first
IBAN Validator
Validate any IBAN against ISO 13616 country length rules and the official mod-97 checksum, and see exactly why an IBAN fails — wrong country, wrong length, or a bad check digit.
- Per-country length validation
- Mod-97 checksum verification
- Explains the exact failure reason
- Privacy-first
User Agent Parser
Parse any user agent string into browser, engine, operating system, device, and CPU architecture — free, instant, and entirely client-side.
- Detects browser & engine
- Shows OS, device & CPU
- Copy any field or JSON
- Privacy-first
URL Parser
Parse a URL into protocol, host, path, and query parameters, edit them live, and rebuild it instantly — free and entirely client-side.
- Full URL component breakdown
- Editable query parameter table
- Supports relative URLs
- Privacy-first
Mock Data Generator
Build a custom schema with 20+ field types and instantly export mock data as JSON, CSV, or SQL INSERT statements, right in your browser.
- 22 field types
- JSON, CSV & SQL export
- Up to 1,000 rows
- Privacy-first
Meta Tag Generator
Fill in a simple form and get a ready-to-paste block of standard, Open Graph, and Twitter Card meta tags, with live Google and social previews.
- SEO + OG + Twitter tags
- Live search preview
- HTML-escaped output
- Privacy-first
Barcode Generator
Generate scannable CODE128, EAN-13, EAN-8, UPC-A, ITF-14, MSI, pharmacode, and codabar barcodes. Customize colors and download as PNG or SVG. All processing happens client-side — your data never leaves your device.
- 9 barcode formats
- PNG & SVG export
- Custom colors & sizing
- Privacy-first
WiFi QR Code Generator
Generate a QR code that shares your WiFi network name and password so guests connect instantly by scanning. Customize colors and download as PNG or SVG. All processing happens client-side — your data never leaves your device.
- WPA/WPA2, WEP & open networks
- PNG & SVG export
- Adjustable error correction
- Privacy-first