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X3F to JPG Converter

Turn X3F files into JPGs that open everywhere. Free, private, nothing is uploaded.

Convert
Files never leave your device

Drop X3F 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 X3F to JPG

    1. Add your X3F 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 X3F to JPG?

    X3F is the RAW format of Sigma cameras with Foveon sensors, such as the dp Quattro and sd Quattro.

    The converter uses the full-colour JPEG preview that the camera embeds inside every RAW file. On most Canon, Nikon, Pentax and Olympus cameras it is full resolution; on some Sony and Fujifilm models it is a smaller preview.

    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.

    X3F vs JPG

    X3FSigma RAWJPGJPEG image
    TypeCamera raw sensor data plus an embedded JPEG previewRaster photo
    CompressionUncompressed or lossless; usually 20–60 MB per photoLossy, adjustable quality
    TransparencyNot supportedNot supported
    AnimationNot supportedNot supported
    SupportPhoto editors such as Lightroom; not browsers, phones or upload formsEvery device, browser, app and website
    Best forEditing photos with maximum detail and dynamic rangePhotos you need to share, upload or print

    Frequently asked questions

    Will I lose quality converting X3F 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.

    Is this a full RAW conversion?

    It extracts the JPEG image the camera stores inside the RAW file, which matches the in-camera look. It is fast and private, but it does not re-develop the raw sensor data.

    Can I convert many X3F 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 X3F files without converting?

    Sigma’s own free software for X3F files is Sigma Photo Pro. Lightroom, Capture One, darktable and RawTherapee also open them. On a phone or in a browser, converting to JPG is the quickest way to view and share the photo.

    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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