How to Use
- Paste a Data URI that starts with
data:image/...;base64,, or paste a raw Base64 string. - If the input has no Data URI prefix, choose PNG, JPG, WebP, GIF, SVG, or AVIF in โInput MIME Typeโ.
- The tool cleans whitespace automatically and shows the image preview, MIME type, dimensions, and decoded file size.
- Choose Original, PNG, JPG, or WebP under โDownload Formatโ, then click โDownload Imageโ.
Optional: click โLoad QR Sampleโ to insert a local SVG Data URI and quickly test the preview and download flow.
Core Features
- Local Base64 image decoding: Image data is parsed in your browser, ideal for screenshots, signatures, barcodes, and internal assets.
- Instant Image Preview: Paste a Data URI or raw Base64 string and quickly confirm whether the image renders correctly.
- Messy Input Friendly: Cleans line breaks, spaces, and surrounding whitespace; for raw Base64, you can choose the image MIME type.
- Download Common Formats: Keep the detected original format or export the preview as PNG, JPG, or WebP.
- No server round trip: Preview and download happen on your device, reducing exposure for sensitive image data.
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Calculation Logic
Base64 images are often stored as Data URIs, such as data:image/png;base64,.... The part before the comma declares the image MIME type, and the part after the comma contains the Base64-encoded binary image data. Browsers can render that string directly as an image resource.
This tool cleans line breaks and extra whitespace, then verifies that the value is a valid image Base64 string. When a Data URI prefix exists, the MIME type is detected automatically. For raw Base64, the selected input MIME type is used to build the image source. PNG, JPG, and WebP downloads are exported by drawing the preview image to a browser Canvas.
FAQ
Is my image data exposed?
No. Decoding, preview, and download all run with browser-native APIs on your device. The Base64 string is not uploaded to a server.
Why does my Base64 image not display?
Check that the string is complete and contains only valid Base64 characters. If there is no data:image/...;base64, prefix, choose the correct input MIME type.
Which image formats are supported?
Common browser-rendered image types are supported, including PNG, JPG, WebP, GIF, SVG, AVIF, BMP, and ICO. Converted downloads support PNG, JPG, and WebP; the original option keeps the detected image type.
Can it handle very large Base64 strings?
Yes, but it uses local browser memory. Very large images may take longer to render, especially on mobile devices.
Does Base64 to image repair broken files?
No. The tool helps verify whether a string can be rendered by the browser, but it does not use AI or extra repair algorithms to fix corrupted or truncated data.