PsyCalibrator review

Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

PsyCalibrator is an open-source package for display gamma calibration, luminance measurement, and color measurement. It is aimed at researchers and technical users who need to characterize and calibrate monitors rather than manage general display settings. The workflow measures display output, fits correction data, generates a color lookup table, applies gamma correction, and checks linearity after calibration. Its free plan and support for Windows, macOS, and Linux make it a practical fit for open-source workflows across the three major desktop platforms.

Its main strength is the depth of its calibration workflow. Users can measure display luminance and color, calibrate individual RGB channels or grayscale gamma, fit data for display linearization, generate a LUT, and apply or remove display gamma correction. Post-calibration linearity verification adds a direct check of the resulting display behavior. The software runs with MATLAB or GNU Octave and Psychtoolbox, so its platform reach is broad, but its setup is tied to that technical software environment rather than a standalone desktop application.

Hardware compatibility is the key selection factor. PsyCalibrator supports Spyder5 and SpyderX/X2 devices, along with Windows photometer drivers, which makes it suitable for users who already work with those measurement tools. It is less suitable for teams needing broader instrument coverage or a simpler calibration workflow with fewer technical dependencies. Choose PsyCalibrator for free, open-source monitor characterization with LUT generation and verification; choose an alternative when hardware flexibility or a less specialized setup matters more.

PsyCalibrator pros and cons

• Where it wins
  • Measures luminance and color, then verifies post-calibration linearity
  • Generates LUTs and calibrates RGB-channel or grayscale gamma
  • Runs across Windows, macOS, and Linux with MATLAB or GNU Octave
• Where it doesn't
  • Requires MATLAB or GNU Octave and Psychtoolbox
  • Verified hardware support centers on Spyder5 and SpyderX/X2
  • Windows photometer support depends on driver compatibility

PsyCalibrator fact sheet, pricing and score →

Advertiser disclosure: iTechGuides is reader-supported. Vendors can pay for top positions in our rankings and for a place on other products' pages, and we may earn a commission when you click some links. Bought places stand at the number bought; this page and our disclosure say so. Paying vendors may get a fuller, more detailed review from our editors, and that review can change their score. How we rank.

Last updated 7 Oct 2026 · How we research and update