Base64 to Image Decoder
Paste a Base64 string or data URI and get a viewable, downloadable image back, all in the browser. It works out the image type from the data URI, previews the result on a checkerboard so any transparency shows, and uploads nothing.
- 100% free
- Private & safe
- Runs in your browser
Read our complete guide: How to Convert Base64 Images for Fast Web Performance
Why use Base64 to Image?
Base64 to Image lets you edit and optimise images in seconds, right in your browser — no bulky software to install and nothing uploaded to a server.
- Runs instantly in your browser — nothing to install, nothing uploaded.
- Completely free, with no account, no watermarks and no usage limits.
- Handles Input: Base64 or data URI; Output: image file (type detected from the data URI).
- Paste a Base64 string or a full data URI.
- Works on any device — desktop, tablet and phone — and is fully keyboard accessible.
How to use Base64 to Image
- Paste a Base64 string or a full data URI.
- Click Preview image to decode and render it locally.
- Check it on the transparency-friendly checkerboard, then download the file.
- Reset to decode another string.
Examples
- Turning a Base64 data URI from code back into a PNG file.
- Previewing an inline image pulled from a stylesheet.
Supported formats & limits
- Input: Base64 or data URI
- Output: image file (type detected from the data URI)
Limitations
- Invalid or truncated Base64 cannot be decoded and will show an error.
- Very large strings depend on your device's memory.
- If no data URI prefix is present, PNG is assumed for the download.
Frequently asked questions
What input does it accept?
Either a full data URI (data:image/png;base64,…) or just the raw Base64 characters.
Is decoded content run as code?
No. The data is only turned into an image blob and rendered safely.
Is anything uploaded?
No — decoding happens entirely in your browser.
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