100% in your browser · files never leave your device

Base64 to Image Viewer & Downloader — Free & Private

Paste a base64 string or data URL to preview and download it as an image. Runs locally in your browser. No upload, no signup.

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Decode base64 back into an image file

Base64 image blobs show up everywhere — API responses, database exports, email HTML, and inline SVG-adjacent assets. To get the actual picture back you need to decode the payload and reassemble the binary file.

Paste either a full data URL or the raw base64. The tool detects the format from the header, or from the file's magic bytes when no header is present (JPEG, PNG, GIF, and WebP signatures are recognized), then renders the image and offers a download with the right extension.

Decoding happens in your browser tab. Nothing is sent to a server, so it is safe for customer data, internal screenshots, and anything else you would rather not hand to a random paste site.

How to use Base64 to Image

  1. 1Paste a data URL (data:image/…) or a raw base64 string.
  2. 2The image type is detected from the header or the magic bytes.
  3. 3Preview the decoded image and check its size.
  4. 4Click “Download image” to save the file locally.

Base64 to Image FAQ

Can I paste base64 without the data: prefix?
Yes. The tool sniffs the image type from the magic bytes, so raw base64 works as well as a full data URL.
What formats can it detect?
JPEG, PNG, GIF, and WebP are recognized from their file signatures; anything with an explicit data:image/… header works too.
Is my base64 data sent anywhere?
No. Decoding and previewing happen entirely in your browser tab.
How large a base64 string can it decode?
Multi-megabyte payloads work fine — decoding happens in memory. Very large strings (hundreds of MB) depend on your device's available RAM, since the whole image is held in the tab.

Updated 26 August 2026

What is Base64 to Image?

Paste a base64 string or data URL to preview and download it as an image. Runs locally in your browser. No upload, no signup.

  • Raw base64 works: JPEG, PNG, GIF, and WebP are sniffed from magic bytes.
  • A full data:image/… URL works too when the header is present.
  • Decoding is in-memory. Hundreds of megabytes depend on RAM in this tab.

How to use it

  1. Paste a data URL (data:image/…) or a raw base64 string.
  2. The image type is detected from the header or the magic bytes.
  3. Preview the decoded image and check its size.
  4. Click “Download image” to save the file locally.