Image to Base64 Converter
Convert images to Base64 text, or paste Base64 back into an image — entirely in your browser.
Drop an image here or click to browse
PNG, JPEG, WEBP, or GIF — stays on your device
About the Image to Base64 Converter
Base64 encoding turns binary image data into plain text, so it can be embedded directly inside HTML, CSS, JSON, or a data URI without a separate file request. This tool converts images to Base64 in several ready-to-use formats, and can also decode a Base64 string or data URI back into a downloadable image. Everything happens locally in your browser — nothing is uploaded to a server.
Features:
- Encode to raw Base64, data URI, CSS, HTML, or Markdown
- Decode a Base64 string or data URI back into an image
- Shows encoded size and overhead versus the original file
- Handles large files by chunking the conversion so the tab never freezes
How to Convert an Image to Base64
- Switch to "Encode" and upload an image
- Wait for the conversion to finish (it happens automatically)
- Pick the output format you need — raw, data URI, CSS, HTML, or Markdown
- Click "Copy" to copy the snippet to your clipboard
Frequently Asked Questions
What is Base64 encoding used for?
Base64 turns binary data like an image into plain text, which lets you embed it directly inside HTML, CSS, or JSON without hosting a separate file.
Is my image uploaded anywhere?
No. Encoding and decoding both happen entirely in your browser using JavaScript — your image and Base64 text never leave your device.
What image formats are supported?
Encoding accepts any image your browser can read, including PNG, JPEG, WEBP, and GIF. Decoding auto-detects PNG, JPEG, WEBP, and GIF from the data itself.
Why is the Base64 bigger than my image?
Base64 encodes every 3 bytes of binary data as 4 text characters, which adds roughly 33% to the size. It is a text-safe trade-off, not a bug.
Can I decode a data URI without the "data:image/png;base64," prefix?
Yes. If you paste raw Base64 without a prefix, the tool inspects the decoded bytes for a PNG, JPEG, GIF, or WEBP signature to detect the image type automatically.
When should I inline an image as Base64?
Base64 is useful for small icons or images where you want to avoid an extra network request — for example inside CSS, an email template, or a single-file HTML export. For larger photos, a regular image file with caching is almost always faster.
Privacy
Your image and Base64 text are processed entirely in your browser. Nothing is ever uploaded to a server.