Drop your JPG file into the picker and our encoder produces a JFIF output tuned for web delivery: quality factor 80 by default (a Lighthouse sweet-spot), correct color space, and an Accept-aware fallback you can ship behind a `<picture>` element alongside the original JPG.
Will JFIF actually be smaller than JPG?
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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 JFIF = PNG / JPG) typically grows the file because you are leaving a more modern codec for an older one — useful for compatibility, not size.
Does JPG to JFIF preserve transparency / alpha?
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Transparency survives when JFIF 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 JFIF.
Can I keep my color profile (sRGB / Display P3) going from JPG to JFIF?
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Yes for JFIF formats that store ICC profiles (PNG, JPG, WebP, AVIF, TIFF). Modern wide-gamut profiles like Display P3 round-trip through WebP and AVIF; sRGB profiles round-trip through every common JFIF. If JFIF cannot store a profile, output is tagged sRGB to keep browsers from guessing.
What lossy vs lossless quality settings does the JFIF encoder support?
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Lossy JFIF (WebP / AVIF / JPG) accepts a quality 1-100, default 80. Lossless JFIF (PNG / WebP lossless / TIFF) does not take a quality dial — every pixel is preserved. WebP and AVIF are the only formats that can do either, which is why they are ideal JFIF targets when source JPG mixes photos and graphics.
Will the JFIF version look identical to the JPG 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 JPG is screenshots or UI mockups, push quality to 90 or use a lossless JFIF.
Does JPG to JFIF keep animation frames?
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Animated JPG (animated WebP, GIF, APNG) survives only when JFIF is also animation-aware (animated WebP, GIF, APNG). Converting an animated JPG to a static JFIF (PNG, JPG, AVIF still) yields just the first frame — use a dedicated animation converter if you need to keep all frames.
Will EXIF camera metadata survive JPG to JFIF?
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Yes by default when both JPG and JFIF support EXIF (JPG, PNG, WebP, TIFF, HEIC). Camera fields (ISO, shutter, lens, GPS) are copied through. Use the "strip metadata" option if you are publishing to the web and want to drop GPS coordinates before JFIF leaves your browser.
Can I batch convert a folder of JPG files to JFIF?
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Yes — drop multiple JPG files at once and they encode in parallel. Free accounts: 100 MB per file. Pro accounts get more parallel workers and bigger per-file caps, so a 200-image gallery typically finishes in well under two minutes.
Are my JPG files private during JFIF conversion?
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Yes — uploaded JPG files are processed in isolated workers and deleted within minutes. No human reviews the pixels, no copy is retained, no third party gets a feed. See /privacy/ for the precise retention window.
How do I serve the JFIF with a JPG fallback on my site?
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Use a `<picture>` element: `<picture><source srcset="image.JFIF" type="image/JFIF"><img src="image.JPG" alt=""></picture>`. Browsers that understand JFIF fetch the smaller file; older browsers fall back to JPG. WebP is supported in 96%+ of installed browsers, AVIF in 90%+.
Why is my JFIF file unexpectedly bigger / smaller than I expected?
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A JPG that is already heavily compressed (low-quality JPG) often grows when re-encoded into a lossless JFIF (PNG / TIFF). A high-bitrate lossless JPG (PNG / TIFF) often shrinks 60-90% when going to a lossy modern JFIF (WebP / AVIF). Image content matters too — photos compress very differently from line art and screenshots.