Base64Img
Free · No upload · Runs in your browser

Base64 to JPG / JPEG Converter

Paste a Base64 string or full data URI to preview the image instantly and download it as a JPG file — smaller and ready for the web.

100% client-side. Nothing is uploaded — decoding happens in your browser.

Base64 to JPG, explained

This converter detects PNG, JPG, GIF, WebP or SVG Base64 input and exports a real .jpg file. JPG (or JPEG) is a lossy format that shrinks file size dramatically, which makes it the right choice for photographs and complex images where a little quality loss is invisible to the eye.

When to choose JPG

  • Photos and gradients. JPG compresses smoothly-shaded images far better than PNG.
  • You want a smaller file. Great for web delivery and email attachments.
  • Transparency isn't needed. JPG has no alpha channel — transparent pixels become a solid background.

What you can paste

  • A full data URI — for example, data:image/png;base64,iVBOR... or data:image/jpeg;base64,/9j/....
  • A bare Base64 body — the source format is detected automatically before conversion.

Private by design

Decoding uses the browser's native image handling — the string is turned into an image element locally and never sent anywhere. Safe for confidential assets.

More Base64 converters

Image to Base64Encode any image into a data URI. PNG to Base64Encode PNGs, transparency kept. JPG to Base64Turn JPEG photos into a data URI. JPEG to Base64Encode JPEG photos with the .jpeg extension. SVG to Base64Encode vector SVGs for CSS. WebP to Base64Encode modern WebP images. GIF to Base64Encode GIF animations into a data URI. Base64 to ImageAuto-detect PNG, JPG, GIF, WebP or SVG. Base64 to PNGDecode and save as PNG. Base64 to SVGDecode vector SVG markup. Base64 to WebPDecode and save as WebP. Base64 to GIFDecode and save as a GIF.

Frequently asked questions

How do I convert a Base64 string to a JPG?

Paste the Base64 string or full data URI into the box and click Convert to JPG. The source image is detected automatically and exported as a real .jpg file.

Does JPG keep transparency?

No. JPG has no alpha channel, so any transparent areas are filled with a solid background (usually white) in the saved file. Use PNG if you need transparency.

Is the decoder private?

Yes. Decoding happens entirely in your browser. Nothing is uploaded, so your data stays on your device.