Step 1: Attach your JFIF files using the button above or by bring and position.
Step 2: Click the 'Optimize' button to start the optimization.
Step 3: Collect your converted JPEG files.
JFIF to JPEG Optimization FAQ
Will JPEG actually be smaller than JFIF?
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Almost always when going from PNG / JPG / TIFF into WebP or AVIF: expect 25-50% smaller than JPG at the same visual quality, 60-90% smaller than PNG. Going the other way (WebP / AVIF back to JPEG = PNG / JPG) typically grows the file because you are leaving a more modern codec for an older one — useful for compatibility, not size.
Does JFIF to JPEG preserve transparency / alpha?
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Transparency survives when JPEG supports alpha (PNG, WebP, AVIF, GIF, TIFF, SVG). Converting to JPG flattens the alpha channel onto white — if you need transparency on the modern web target WebP or AVIF instead of JPEG.
Will the JPEG version look identical to the JFIF on a Retina display?
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At quality 80+ on WebP / AVIF the difference is invisible to anyone but a trained eye even at 3x device pixel ratio. Photos compress slightly more visibly than line art; if your JFIF is screenshots or UI mockups, push quality to 90 or use a lossless JPEG.
Will EXIF camera metadata survive JFIF to JPEG?
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Usually not. In most conversions, camera EXIF fields such as the camera model and GPS position are not carried into the JPEG. There is no setting on this page to keep or remove metadata, so check the result with a metadata viewer if it matters.
Can I batch convert a folder of JFIF files to JPEG?
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Several files in one job need a paid plan. Free use is one file per conversion, one conversion an hour. On a paid plan you can add several files to one job, then download each result on its own or all of them in one ZIP.
Are my JFIF files private during JPEG conversion?
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Yes. Uploaded JFIF files are processed on our own conversion servers, no person reviews them, and they are never shared. The upload and the converted JPEG are both deleted automatically about 24 hours after the conversion, which leaves time to download the result. See /privacy/ for the full policy.
How do I serve the JPEG with a JFIF fallback on my site?
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Use a `<picture>` element: `<picture><source srcset="image.JPEG" type="image/JPEG"><img src="image.JFIF" alt=""></picture>`. Browsers that understand JPEG fetch the smaller file; older browsers fall back to JFIF. WebP is supported in 96%+ of installed browsers, AVIF in 90%+.
Why is my JPEG file unexpectedly bigger / smaller than I expected?
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A JFIF that is already heavily compressed (low-quality JPG) often grows when re-encoded into a lossless JPEG (PNG / TIFF). A high-bitrate lossless JFIF (PNG / TIFF) often shrinks 60-90% when going to a lossy modern JPEG (WebP / AVIF). Image content matters too — photos compress very differently from line art and screenshots.
