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Decode Base64 back to an image

Paste a Base64 string or data URI and get the real image file back, ready to view and download. Works with or without the data:image prefix. It all happens in your browser, nothing is uploaded.

Runs in your browser With or without prefix Download the real file
Decoded image
Dimensions—
Format—
How to use it

Paste a string, get the file back

The screenshot is a real decode: a data URI pasted in, turned back into a viewable, downloadable image.

1

Paste the Base64 string

Drop in the string from page source, an API response, a CSS background or devtools. The prefix is optional; the tool reads it with or without data:image at the front.

2

Decode and download

Click Decode and the real image appears with its dimensions and format. Download it as a normal file. Everything happens on your device.

The Base64 to Image tool with a data URI pasted in and the decoded image shown with a download button
A real decode: the string turned back into a downloadable image.
When you need it

Where these strings come from

A Base64 string is an image hiding inside text, and you run into them more than you would expect: inline images in page source, CSS backgrounds written as data URIs, thumbnails embedded in an API response, or a blob dumped into a debugging log. On their own they are unreadable.

This tool turns any of them back into a real file you can open, save or re-use. Paste, decode, download. It is the exact reverse of the Image to Base64 tool.

Honest limits

What this tool will not do

The string has to be valid

A truncated copy, a stray space or a line break will fail to decode. Copy the whole string cleanly, from the first character to the last, and try again.

It only decodes images

Base64 can encode any file, but this tool expects an image data URI. A string that decodes to a PDF or a zip will not display here.

It does not improve the image

You get back exactly what was encoded. If the original was small or low quality, the decoded file will be too; decoding cannot add detail.

FAQ

Frequently asked questions

No. Paste it either way. With the full data:image/jpeg;base64, prefix or just the raw string starting with something like /9j/ for JPEG or iVBORw0 for PNG, the tool handles both.

Whatever the data URI says: a data:image/jpeg gives a JPG, a data:image/png gives a PNG. If there is no prefix, it defaults to PNG.

Usually a stray space or line break, or a string that got cut off when you copied it. Grab the whole thing cleanly and try again. Valid characters are A to Z, a to z, 0 to 9, plus, slash and the equals padding.

Page source with inline images, CSS data-URI backgrounds, API responses with embedded thumbnails, and the output of devtools or debugging logs. This tool turns any of them back into a real file.

No. Decoding happens in your browser. Nothing is transmitted to a server, and it works offline.

Related tools

Other tools you might need

Image to Base64

The reverse: turn an image into a data URI.

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Image Compressor

Shrink the decoded file if it is large.

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Image Converter

Change the decoded image to another format.

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Image Resizer

Resize the decoded image to what you need.

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Image Crop

Trim the decoded image down.

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PNG to JPG

Convert a decoded PNG to a smaller JPG.

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WEBP Converter

Save the decoded image as a smaller WEBP.

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EXIF Metadata Viewer

Inspect what a decoded photo carries.

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