Decode

Base64 to Image Converter

Paste a raw Base64 string or a full data URI. The image is decoded on your device, with the format detected automatically.

1. Paste Base64 or data URI

Auto-detect

2. Preview & download

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The decoded image will appear here.
About this tool

About Base64 to Image

This decoder reverses a Base64 string or data URI back into a viewable image you can preview, download, or copy. It is handy when you find an encoded image in a config file, an API payload, or CSS and want to see what it actually is.

Encoded images are opaque until decoded. Turning them back into a picture locally lets you inspect or extract the asset without trusting an online decoder with the data.

How to use

Step by step

  1. Paste a raw Base64 string or a full data: URI into the input box.
  2. The tool auto-detects the image type from the prefix or the decoded bytes.
  3. A preview renders so you can confirm the image decoded correctly.
  4. Download the image to your device, or copy it for reuse.
Key features

What it offers

  • Raw Base64 or data-URI input
  • On-device decoding
  • Format detection
  • Image preview and download
Best practices

Tips for best results

  • If decoding fails, check for line breaks or stray spaces in the pasted string.
  • A data URI starting with data:image makes type detection most reliable.
  • Very large strings may take a moment to render; this is normal for high-resolution images.
Benefits

Why people use it

Auto type detection

Recognises the format whether you paste raw Base64 or a complete data URI.

Instant preview

See the decoded image immediately rather than trusting the string blindly.

Local decoding

Nothing is uploaded — the bytes are decoded in your browser.

Clear errors

Invalid input is explained instead of producing a broken image.

FAQ

Common questions

Paste the Base64 string or data URI into the box. The tool decodes it locally, detects the image type, and shows a preview you can download or copy.
Yes. If you paste a data: URI the prefix is read for the MIME type; if you paste raw Base64 the type is detected from the decoded bytes.
You will get a clear error explaining what went wrong — for example invalid characters or a length that cannot be decoded — instead of a broken image.
There is no fixed limit; large strings are supported and processed in your browser. Very large inputs may take a moment to render.
No. Decoding happens entirely in your browser, so your data never leaves your device.

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Private by design

This runs entirely in your browser

No file or text you enter here is uploaded. Encoding and decoding happen on your device using native browser APIs — close the tab and nothing remains on a server.

Install Toolisco Add it to your device for offline, one-tap access.