How to use the JFIF to JPG converter
- Drop your .jfif pictures here (.jpe files work as well).
- Leave Re-encode unticked to keep the picture untouched.
- Tick it only if you also want a smaller file, and set the quality.
- Convert and download the .jpg files or a ZIP.
Why Windows hands you .jfif
JFIF is the name of the standard wrapper inside most JPEG images. On some Windows PCs a registry setting links the JPEG type to the .jfif extension, so Chrome and Edge save downloaded photos that way.
Video platforms, forums and form uploaders often check only the extension. The content is perfectly normal, but .jfif is not on their list, so the file is turned away.
Rename or re-encode
With Re-encode off, the output is a byte-for-byte copy under a new name: same quality, same size, instant even for large batches.
With it on, the picture is decoded and saved again by MozJPEG at your chosen quality, 90 by default. That can make a heavy image lighter, and the EXIF block is not carried over.
Whole download folders
Select all the .jfif files in your downloads, or drag that whole folder in, and the batch gets its new names in a single pass. Since nothing is decoded when Re-encode is off, hundreds of files take moments.
Grab them one at a time, or press the ZIP button to collect the set in one archive ready to upload.
Questions
Does the picture change at all?
Not with Re-encode off. Only the file name ending changes; the image data is identical.
Why not just rename it myself?
That works for one file. This page is quicker for dozens, and on phones or PCs that hide extensions.
When is re-encoding worth it?
When the JFIF is several megabytes and the destination has a size limit. Quality 80 to 85 usually trims a lot while still looking clean in a thumbnail or post.