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JFIF to WebP

Convert .jfif images saved from the web to WebP. Nothing is uploaded.

On your device

Drop JFIF files here

Converted on your device. Files are never uploaded.

Up to 20 files at a time.

Options
1 to 100

Images saved from a browser sometimes land as .jfif files, which many upload forms and apps refuse. JFIF is ordinary JPEG data, and FormatJet re-saves it as a WebP, lossy or lossless, ready for the web. The conversion happens in your browser, so the image never leaves your device.

About the formats

JFIFJFIF image

JFIF is a JPEG image with a .jfif extension, often created when saving pictures from a web browser. The picture data is the same as a JPG, but many apps don’t recognise the extension.

WebPWebP image

WebP is an image format made for the web. Files are smaller than JPG and PNG and can have transparency or animation, but some older apps can’t open it.

Converted with jSquash, Image engine.

Questions

What is a JFIF file?

JPEG image data under a different extension, which some browsers use when you save a picture. FormatJet decodes it like any JPEG and saves the result as WebP.

Is any quality lost?

By default the WebP is lossy at quality 80, a fresh round of compression on top of the JPEG’s. Tick “Lossless (larger files, no quality loss)” in Options to keep the decoded pixels exactly.

Does the WebP keep the image’s Exif data?

No. Exif details such as the date, camera and location aren’t carried into the WebP.

Can’t I just rename the file to .webp?

No. Renaming changes only the name, so the data inside is still JPEG, and any app that reads the contents sees that. If a .jpg is all you need, JFIF to JPG is the better page.

JFIF to WebP with the API

The conversion API opens later this year.

curl https://api.formatjet.com/v1/convert?to=webp \
  -H "Authorization: Bearer fj_test_…" \
  -F file=@input.jfif -o output.webp