Process RAW photographs with RawTherapee, a cross-platform image editing program.
Open source
24 alternativesfSpy
Match a photograph's perspective to a 3D scene with fSpy, an open-source cross-platform application.
About fSpy
fSpy is a camera matching tool for still images. It estimates the camera settings behind a photograph so that the camera can be placed in a 3D scene with the same perspective. The homepage describes it as free to download and use, with an optional donation button. It is available for Mac, Windows and Linux. The homepage describes fSpy as open source, but the directory record lists it as not open source, so check the project's own source before relying on either label. For Blender, an official importer add-on sets the camera parameters and can optionally set the photograph as the camera background. Other applications without an importer need the camera values copied in by hand, one at a time.
Key features
- Camera matching for still photographs
- Estimates camera field of view, position and orientation
- Estimates the principal point, unless it matches the image midpoint
- Official Blender importer add-on that sets camera parameters
- Optional setting of the photograph as the Blender camera background
- Available for Mac, Windows and Linux downloads
Best for: Artists, photographers and 3D users who need to match a photograph's camera perspective to a 3D scene, particularly those working in Blender.
Good for
- Free to download and use, according to the homepage
- Official importer for Blender
- Downloads offered for Mac, Windows and Linux
Watch out for
- Applications without a dedicated importer require manual copying of each camera value
- The homepage does not describe a dedicated importer for other applications
fSpy at a glance
- Website
- fspy.io
- Category
- Design & Creative › Photography
- Type
- Online tool
- Pricing
- Not confirmed. Check the site
- Platforms
- Linux, Web, Windows
- Open source
- Not stated
- Language
- English
- Last checked
- Oct 6, 2026 · Online when checked
- Listed
- Oct 5, 2026
fSpy alternatives
Tools and sites you could use instead, ranked by how closely they match.
RawTherapee is a free, cross-platform raw photo processing program for developing raw files from digital cameras.
FreeOpen source
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Edit EXIF, IPTC and XMP metadata in digital photographs with Photini, a free desktop application.
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Hide data in files or add watermarks with OpenPuff, a steganography program for Windows.
View, create and edit EXIF metadata with Exif Pilot, a free image metadata editor.
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Read, write and edit image metadata with ExifTool, a command-line application and Perl library.
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fSpy FAQ
Is fSpy free to use?
The homepage states that fSpy is free to download and use. A donate button is provided for users who want to pay, with the amount chosen by the user.
How do I move fSpy camera settings into an application without an importer?
The homepage outlines a manual process. Set the viewport to match the image dimensions, use the image as the camera background, then copy the field of view, position, orientation and principal point values one by one.
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