Compress Image to 1 MB Online — Email, Discord & Docs
Reduce any photo to under 1 MB in your browser — a size that fits comfortably in email attachment limits, Discord uploads, and documentation systems. Set the target once and download the result.
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画像圧縮
画像を目標サイズに圧縮
画像をアップロードし、希望の最大ファイルサイズを設定。無料、安全、ブラウザ内で動作。
画像をここにドラッグ&ドロップ
またはクリックして参照（PNG、JPG、WebP — 最大50MB）
画像圧縮について
高度な画像圧縮ツールが、マルチパス適応圧縮で最適なファイルサイズ削減を実現。目標サイズを正確に設定し、画質とサイズの最適なバランスをエンジンが自動で見つけます。
機能：
- 正確な最大ファイルサイズを設定（MBまたはKB）
- スマートな画質検索によるマルチパス適応圧縮
- PNG、JPG、WebP形式のサポート
- 最大50MBの入力ファイルサイズ制限
- 完全にブラウザ内で動作 — ファイルはデバイスから離れません
- 登録不要で完全無料
Why this matters
1 MB is a versatile ceiling: it clears most non-Nitro Discord upload caps, keeps a handful of embedded photos well under Gmail and Outlook's attachment limits, and satisfies documentation platforms that flag anything larger as bloat. Modern phone photos routinely land at 4–12 MB, so attaching several to an email or a support ticket can silently exceed limits or make a shared drive folder sluggish to sync. Compressing to 1 MB keeps detail intact for screenshots, diagrams, and photos while cutting transfer time and storage several times over.
Step by step
- 1Open the Image CompressorThe target is already set to 1 MB (1024 KB) — drop in your photo or screenshot.
- 2CompressThe tool iterates quality in your browser until the file lands at or under 1 MB.
- 3PreviewCompare original and compressed — at 1 MB, quality loss is rarely visible.
- 4Attach or uploadAdd the compressed file to your email, Discord message, or documentation page.
- 5Repeat for more filesProcess additional images one at a time, or use the Batch Photo Editor for several at once.
Frequently asked questions
What is Discord's non-Nitro upload limit?
Free Discord accounts cap file uploads at 10 MB (25 MB for boosted servers). Compressing to 1 MB leaves plenty of headroom and keeps channels fast to load.
Will a 1 MB photo look noticeably worse?
For almost any photo, no. 1 MB is a generous target — quality loss only becomes visible when compressing much further, down toward 100–200 KB.
Is my file uploaded to compress it?
No. Compression is entirely client-side in your browser. Your images stay on your device throughout.
How many 1 MB photos can I attach to an email?
Gmail and Outlook cap total attachments at 20–25 MB, so roughly 15–20 photos compressed to 1 MB each fit comfortably in one email.
Does compressing affect screenshot text sharpness?
Screenshots with text compress well at 1 MB using JPG. If you need pixel-perfect text, use PNG instead, though the file will be somewhat larger.
Can I use this for documentation screenshots?
Yes — 1 MB keeps documentation pages loading quickly while preserving enough detail for UI screenshots and diagrams.
Further reading
- JPG vs PNG: Which Image Format Should You Use?JPG and PNG are the two most common image formats on the web, but they serve very different purposes. Learn which one to use for photos, logos, screenshots, and more.
- What Is WebP and Should You Use It?WebP is a modern image format from Google that delivers smaller files than JPG or PNG with comparable quality. Here is everything you need to know before switching.
- How to Compress Images Without Losing QualityLarge image files slow down websites and fill up storage. This guide explains the practical techniques for making images smaller while keeping them looking sharp.
You might also need
- Compress Image to 500 KB Online — Web Hero & Blog ImagesShrink a large hero image or blog featured photo to under 500 KB in your browser — a size that keeps pages fast without visibly sacrificing quality. Drop in the file and download the result.
- Compress PDF for EmailShrink any PDF to fit under email attachment limits — Gmail (25 MB), Outlook (20 MB), corporate (often 10 MB). Set the target and download.
- Resize Image for Discord (512×512 Avatars & Emoji)Resize a photo or graphic to 512×512 pixels — the size Discord recommends for uploading avatars and custom emoji. Crop to a clean square and download.