How to use
01
Paste the string or data URI
Drop your Base64 into the input box. Full data URIs work as is, and raw payloads are fine too, because the tool prepends a data:image/png;base64, prefix automatically when one is missing.
02
Hit Decode
Click the Decode button. Whitespace and line breaks are stripped first, then the image renders in a preview panel below. If the data can't be displayed as an image, an error message appears instead.
03
Download the file if you need it
Press Download to save the preview to disk. The extension comes from the MIME type in the data URI, so a image/jpeg URI saves as decoded.jpeg and a plain string saves as decoded.png.
Why Base64 to Image
- Paste a Base64 string or full data URI, get a viewable image.
- Auto-detects data URI vs raw Base64.
- Download the decoded image with correct extension.
Common questions
Why does my Base64 image show a broken preview?
The usual suspects are a truncated string, a MIME prefix that doesn't match the actual bytes, or URL safe Base64 that uses - and _ where the standard alphabet has + and /. Copying from logs also sometimes drags in escaped quotes or HTML entities that corrupt the payload.
Does the tool assume PNG for a raw Base64 string?
Yes. Without a prefix it decodes the base64 string to png, meaning it silently prepends data:image/png;base64, before rendering. If your data is really a JPEG, paste the full URI with image/jpeg so the preview and the download extension are correct.
How can I tell what format a Base64 image really is?
Look at the first characters of the payload. PNG data starts with iVBORw0KGgo, JPEG starts with /9j/, GIF starts with R0lGOD, and WEBP starts with UklGR. Those are the file magic bytes shining through the encoding.
Is it safe to decode a Base64 image online if it's sensitive?
With this tool, yes, because decoding is done by your browser rendering a data URI locally. Nothing is posted anywhere, which matters when the blob is a scan of an ID or an internal screenshot.
Can I decode Base64 copied from an email's HTML source?
Usually. Grab the payload from the MIME part or the src attribute, and don't worry about the line breaks email encoding inserts, since the tool strips whitespace automatically. Just leave out the surrounding quotes and any Content-Transfer-Encoding headers.
What happens when my Base64 string contains line breaks?
They're removed before decoding, along with spaces and tabs. That means strings copied from pretty printed JSON, terminal output, or 76 column MIME bodies decode without any manual cleanup.
What filename does the decoded Base64 image download as?
The file saves as decoded plus the extension taken from the data URI's MIME type, for example decoded.png or decoded.jpeg. Rename it after download if you need something more descriptive.