X3F Viewer

Drop an X3F file to see it. Our server develops the RAW picture once; turning, cropping and downloading happen in your browser.

ConvertKitty's X3F viewer opens X3F (Sigma RAW photo) files online, for free: the RAW picture is developed on our server, and everything after that happens in your browser. You can turn, mirror and crop the picture, resize it, set its quality or a file size, remove its location and camera data, and download it as JPG, PNG, WebP, AVIF, TIFF or PDF.

What is an X3F file?

X3F – Sigma RAW photo. X3F is a RAW photo format from Sigma: the data straight from the camera's sensor, before it is turned into a JPG. It keeps more detail to adjust, but needs a RAW converter to be opened.

X3F Converter →

How to open an X3F file

  1. Click Select File, or drop the X3F file anywhere on this page.
  2. Our server develops the RAW picture (it takes a few seconds); then it shows here.
  3. Turn, crop or resize it if you like, pick the format, and click Download.

Frequently asked questions

How do I open an X3F file?

Drop it on this page. Our server develops it, and it shows here in a few seconds. You can then save it as JPG, PNG, WebP, AVIF, TIFF or PDF.

Is my X3F file uploaded?

Yes, once: your browser can't develop camera RAW, so our server does, over an encrypted connection, and deletes the file 72 hours later. Turning, cropping and downloading then happen in your browser.

Is the X3F viewer free?

Yes. Developing the file uses one credit, like a conversion; everything after that is free. Yes. Everyone gets 25 free credits a day, with no account needed. Conversions on our server use one credit per started minute of work, so most cost a single credit. Credits reset at midnight UTC.

Can I change the picture before downloading it?

Yes: turn and mirror it, crop it, resize it, set the quality or aim for a file size (for example under 500 KB), and remove its location and camera data.

Does it show where the photo was taken?

When the file records it, yes: the viewer shows the place as coordinates, read on your device. Tick "Remove location and camera data" to leave it out of the file you download.

Does it work on my phone?

Yes. The viewer works in any modern browser, on a computer or a phone.

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