Base64 to Image

How to use Base64 to Image

1. Paste the Base64 string or full data URL into the box.
2. Wait a moment for the preview to appear below.
3. Check the detected format and size.
4. Press Download to save the image file.

Reading Base64 images

Developers meet Base64 images in API responses, database exports, HTML emails and CSS files. The strings are long and unreadable, so it is hard to tell what picture they hold, or whether they are valid at all. Pasting the string here converts it back into the binary file and renders it, which makes debugging fast.

The decoder first removes whitespace and any data URL header, converts URL-safe characters to the standard alphabet, and checks that the length makes sense. Then it turns the text into bytes and compares the first few against known file signatures. For instance, PNG files begin with the bytes 89 50 4E 47, and JPEG files begin with FF D8 FF.

Troubleshooting a string that will not decode

• Check that the whole string was copied. A cut-off string causes an incomplete length error.
• Remove quotes, commas or JSON escape sequences such as backslash-n around the value.
• Make sure the text is Base64 of an image and not Base64 of JSON or text that merely contains an image reference.
• If it decodes but is not recognised, it may be a different file type such as PDF.
• Very large strings can be slow to paste on mobile devices; try a desktop browser.

Safety and privacy

SVG images are shown only through a normal image element, which means scripts inside the SVG cannot run and external files are not loaded. The decoded file is created as a temporary local object in your browser and released when you change the input.

Nothing is uploaded, so you can safely inspect images from private systems. As always, avoid opening files from sources you do not trust, and remember that downloading a decoded file saves it exactly as the bytes were supplied.

Why use this base64 to image tool

• Detects the real type. Reads the first bytes to identify PNG, JPEG, GIF, WebP, BMP, ICO, AVIF or SVG, even if the prefix is wrong or missing.
• Accepts messy input. Ignores line breaks and spaces, and understands URL-safe Base64 that uses dashes and underscores.
• Clear errors. Tells you when the text is truncated, has illegal characters or is not an image.
• Offline decoding. Decoding is done in your browser, so the content stays on your device.

Frequently asked questions

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