About the JFIF to PNG
A .jfif file is really a JPEG picture with a different file extension. Windows often saves images from websites this way, and some apps and upload forms then refuse them. This converter opens JFIF files and saves them as PNG, a lossless format that is accepted everywhere and won't lose more quality when you edit it. Convert one image or many at once and download the PNGs separately or as a ZIP. The pictures are converted on your device and never uploaded.
Updated October 2026
How to use the JFIF to PNG
- 1Click Select images or drop your .jfif files on the page.
- 2Wait a moment while each converts.
- 3Check the results in the list.
- 4Download each PNG or all of them as a ZIP.
- 5Use the PNGs anywhere a JFIF wasn't accepted.
Why JFIF files cause problems
Many upload forms check the file extension rather than the content, so a perfectly normal photo is rejected just because it ends in .jfif. Converting it to PNG, or renaming it to .jpg, solves the problem.
Stopping Windows from saving JFIF
You can change the registry so Windows saves JPEGs as .jpg again, but editing the registry carries risk. A simpler habit is to right-click and choose Save image as, then type .jpg at the end of the name, or convert the file here when it happens.
PNG or JPG after conversion?
Choose based on what you will do next.
- Editing, adding text or using in documents: PNG
- Uploading where size limits are tight: JPG
- Websites: JPG or WebP for photos, PNG for graphics
Batch converting a downloads folder
Select all the .jfif files in your downloads folder at once. Each is converted in turn, and Download all puts them into one ZIP with matching names.
Where JFIF files come from
Most JFIF files come from saving pictures in Chrome or Edge on Windows, from some messaging apps and from older scanners. The name dates from 1992, when the JFIF standard fixed how JPEG images should be stored in files. Practically every JPEG today is technically a JFIF file, which is why converting is quick and lossless from that point on.
Checking a file is really a JPEG
If a .jfif file won't convert, it may be damaged or not an image at all. A real JPEG starts with the bytes FF D8 FF, which the browser checks when it opens the file. The converter shows a clear error for anything it can't read, and the other files in the batch still convert.
After converting
The PNG keeps the same name with a .png ending, so you can find it easily. If you need to send many pictures, use Download all to get one ZIP, which is easier to attach to an email than separate files.
Phones and computers
JFIF files mostly appear on Windows, but the converter works on any device, including phones that received the files by message. JFIF files are really JPEGs, and PNG is only one option. Use JPG to PNG for the same job on regular JPG files, the Image Converter for other formats, and Compress Image when a file is too large to share.
Features
- Reads .jfif, .jfi and .jpe files
- Lossless PNG output
- Batch conversion
- Full resolution
- ZIP download
- Runs in your browser
Frequently asked questions
What is a JFIF file?
JFIF (JPEG File Interchange Format) is the standard way JPEG images are stored. A .jfif file is a normal JPEG photo; only the extension is unusual.
Why does Windows save images as JFIF?
A Windows registry setting maps the image/jpeg type to the .jfif extension, so some browsers on Windows save downloaded JPEGs that way.
Should I convert to PNG or JPG?
PNG if you will edit the picture or need a format every form accepts without further quality loss. JPG if you want the smallest file; renaming .jfif to .jpg also works.
Can I just rename the file?
Yes, renaming .jfif to .jpg usually works, because the content is JPEG. Converting to PNG is useful when you specifically need PNG.
Will the PNG be bigger?
Usually yes, because PNG is lossless. That's normal and doesn't mean better quality.
Is anything uploaded?
No, the conversion happens in your browser.
Will the PNG look different?
No. It looks exactly like the JFIF; PNG simply stores those pixels without further compression.
Can I convert JFIF to JPG instead?
Renaming the file from .jfif to .jpg is enough, because the content is already JPEG. Use this tool when you need PNG.