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JFIF to JPG Converter

Turn JFIF files into JPGs that open everywhere. Free, private, nothing is uploaded.

Convert
Files never leave your device

Drop JFIF files here

or paste with Ctrl+V · batch and mixed formats welcome

Background for transparency
SVG size
Resolution
Split
Compression
Pages are re-saved as optimised images, so text will no longer be selectable.
Add PDFs and images in any order, then use the arrows to arrange them.
LosslessPNG keeps every pixel. Transparency is preserved.
Icon sizes
Page size
    • Private by design. Converted inside your browser.
    • Instant. No upload queue, no waiting.
    • Unlimited. Convert hundreds of files, download as ZIP.

    How to convert JFIF to JPG

    1. Add your JFIF files

      Drop them on the converter, click Choose files or paste from the clipboard. You can add as many as you like.

    2. Adjust the settings

      Choose a JPG quality. 90% looks identical to the original for most images; 75–80% gives smaller files for email.

    3. Download your JPG files

      Each file converts automatically. Save files one by one or all at once as a ZIP.

    Why convert JFIF to JPG?

    JFIF is a JPEG image with a specific header. Windows and some browsers save downloaded images as .jfif, which many upload forms refuse even though the picture inside is an ordinary JPEG.

    Converting to JPG gives you a file that every phone, computer, website and upload form accepts, at a size that is easy to email and share.

    JFIF vs JPG

    JFIFJPEG File Interchange FormatJPGJPEG image
    TypeRaster photo (JPEG variant)Raster photo
    CompressionLossyLossy, adjustable quality
    TransparencyNot supportedNot supported
    AnimationNot supportedNot supported
    SupportBrowsers and viewers, but often rejected by upload formsEvery device, browser, app and website
    Best forNothing special; usually renamed or converted to JPGPhotos you need to share, upload or print

    Frequently asked questions

    Will I lose quality converting JFIF to JPG?

    JPG is lossy, so the image is re-encoded. At 85–95% quality the difference is not visible in normal viewing. You can change the quality and the files reconvert instantly.

    Can I convert many JFIF files at once?

    Yes. Add as many files as you like; each one converts automatically and you can download them all as a ZIP.

    How do I open JFIF files without converting?

    You need software that supports JFIF. If you only need to view, share or upload the image, converting it is usually quicker than installing a new program.

    Are my files uploaded to a server?

    No. formatmath converts files with code that runs inside your browser. Your files are never uploaded, stored or seen by us.

    Is it free?

    Yes. There is no watermark and no daily limit. An account is optional and only keeps a history of your conversions.

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