PsyCalibrator

At a glance

• Editor score
  6.7 / 10
• Pricing
  Free plan
• Best for
  Open-source users with supported Spyder hardware
• Free plan
  Yes
• Paid from
  Free
• Facts checked
  20 Sep 2026

• 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

Our verdict on PsyCalibrator

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.

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PsyCalibrator pricing

PsyCalibrator fact sheet

Alternatives to PsyCalibrator

• XRX-Rite i1ProfilerA deep X-Rite workflow suite for precise display calibration, profiling, and QA.9.2
• ECEIZO ColorNavigator 7A capable free choice for hardware LUT calibration on compatible EIZO ColorEdge displays.8.9
• Datacolor SpyderSpyder builds custom display profiles across modern monitors, but requires a compatible sensor.8.7

See all PsyCalibrator alternatives →

Featured on iTechGuides

PsyCalibrator is listed in our Display Calibration Software directory. Add the badge to your site — it links back to this page.

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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

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Last updated 7 Oct 2026 · How we research and update