About the Base64 to Image
Paste a Base64 string — either a full data URI or the bare encoded text — and see the decoded image appear immediately in the preview pane. When you're happy with the result, one click downloads it as a proper image file with the correct extension detected automatically from its MIME type. Invalid or truncated input is flagged right away instead of failing silently.
This decoder is the quickest way to inspect Base64 images buried in API responses, JSON payloads, email source, CSS files or database dumps. Decoding happens locally in your browser using the string you pasted; nothing is transmitted, logged or stored. Whether it's a customer's uploaded avatar in a debug log or an inline asset you need to extract, the data stays entirely on your machine.
Features
- Accepts full data URIs or bare Base64 strings
- Instant live preview as you paste
- Download with the correct file extension auto-detected
- Clear error message for invalid or truncated input
- Handles PNG, JPG, GIF, WebP and SVG data
- Decodes locally — your data never leaves the page
How to convert Base64 to an image online
- Copy the Base64 string from your code, JSON or email source.
- Paste it into the input box — with or without the data: prefix.
- Check the decoded image in the live preview.
- Click Download to save it as a real image file.
Frequently asked questions
Do I need to include the data:image prefix?
No. The tool accepts both a complete data URI and a bare Base64 string. If you paste raw Base64 without a prefix, it's treated as a PNG by default, which works for most cases; if the preview looks wrong, paste the full data URI so the correct MIME type is used.
Why does my Base64 string fail to decode?
The most common causes are truncation — part of the string was cut off when copying — stray characters like quotes or line-break escapes from JSON, or a string that isn't image data at all. Copy the value again in full and strip any surrounding quotation marks before pasting.
What image formats can be decoded?
Anything your browser can render: PNG, JPEG, GIF, WebP, SVG and BMP all work, whether animated or still. The download picks up the right file extension automatically from the decoded data's MIME type, so a data:image/webp string saves as a .webp file and a GIF saves as .gif.
Is the Base64 data I paste kept private?
Yes. The string is decoded by your browser on your own device — it is never sent to a server, stored or logged. That makes the tool safe for inspecting images from production logs, customer data or any payload you can't share externally.
Can I decode very long Base64 strings?
Yes. Strings representing multi-megabyte images decode without trouble, since all the work happens in your browser's memory rather than over a network connection. Extremely long strings may take a moment to paste into the box and render in the preview, but the tool itself imposes no length limit at all.