Daniotech

JFIF to JPG converter

Change .jfif images to .jpg with no quality loss. A JFIF file is already a JPEG, so the tool checks the file and saves the same bytes under a .jpg name. Convert one file or fifty, download them as a ZIP, and nothing is uploaded.

Free · Runs in your browser · Updated 17 October 2026

JFIF to JPG converter

Settings

90 looks the same as the original for most photos. Lower makes a smaller file.
JPG has no transparency, so see-through parts are filled with this colour.

How to

Convert JFIF to JPG.

  1. 1Choose your .jfif files, or drop them on the box.
  2. 2Leave “Keep the original bytes” on. Each file is checked: if it starts with the JPEG signature, its bytes are kept exactly; anything else is decoded and saved as a real JPG.
  3. 3Download each .jpg, or Download all to get one ZIP file.

Why it is lossless

JFIF, JPG and JPEG are one format with three names.

Every JPEG file starts with the same three bytes, FF D8 FF. JFIF is the container most JPEG pictures use, defined in 1992 so that files from different programs could be read anywhere. The extension on the end (.jfif, .jpg, .jpeg, .jpe) is only a label.

That is why this converter does not re-compress anything by default. Re-saving a JPEG always costs a little quality, and here there is no reason to pay it. The download is the same picture, the same size and the same pixels, with a name every program and upload form recognises.

Without a tool

Rename it by hand.

  • Windows: in File Explorer, choose View → Show → File name extensions, then rename photo.jfif to photo.jpg and confirm the warning.
  • Mac: select the file, press Return, change the ending to .jpg and choose Use .jpg.
  • Many files: drop them all into the tool above and use Download all, which keeps the original names.
  • Need the picture smaller as well? Drop the .jfif straight into the 20KB resizer or the 50KB compressor; both save .jpg.

FAQ

Questions people ask first.

How do I convert JFIF to JPG?
Drop the .jfif files into the tool above and press Download. The tool checks that each file really is a JPEG inside and saves the same bytes with a .jpg name, so nothing is re-compressed. You can also rename the file yourself: change .jfif to .jpg with file extensions shown.
Is JFIF the same as JPG?
Yes, for practical purposes. JFIF (JPEG File Interchange Format, 1992) is the standard way JPEG pictures are stored in a file, and most .jpg files are JFIF inside. .jfif, .jpg, .jpeg and .jpe are just different names for the same kind of file.
Does converting JFIF to JPG lose quality?
Not with this tool’s default setting. Because a JFIF file is already a JPEG, only the name changes and the picture data stays byte for byte the same. Quality is lost only if you turn off “Keep the original bytes” and re-save at a lower quality.
Why do my images save as .jfif?
On Windows, the browser asks Windows which extension belongs to JPEG images. On some PCs a registry setting maps the image/jpeg type to .jfif instead of .jpg, so Chrome and Edge save pictures as .jfif. The picture is fine; only the extension is unusual.
How do I stop Windows from saving images as JFIF?
The usual fix is to set the registry value HKEY_CLASSES_ROOT\MIME\Database\Content Type\image/jpeg → Extension to .jpg (it is often .jfif). Back up the registry first, or ask someone who manages your PC. Until then, this tool or a rename fixes each file.
Why does a website reject my .jfif file?
Many upload forms check the extension, not the content, and accept only .jpg, .jpeg or .png. Converting the name to .jpg is enough for them to accept it.
Are my files uploaded?
No. The files are read and renamed by your browser on your own device. Nothing is sent to Daniotech or anyone else.

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