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visual-differ

v1.1.0

Published

CLI tool for comparing screenshot directories using pixel-perfect image comparison with HTML reports

Vulnerabilities

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  • 0Low

Links

Git

Maintainers

jrjohnsonjrjohnson

Keywords

screenshotvisual-diffvisual-regressionimage-comparisonpixelmatchtestingcicli

Readme

visual-differ

CLI tool for comparing PNG screenshots between two directories using pixel-perfect image comparison with HTML reports.

Image comparison powered by pixelmatch.

Usage

npx visual-differ <baseline-dir> <candidate-dir> <output-dir>

Arguments

  • <baseline-dir> - Directory containing baseline screenshots
  • <candidate-dir> - Directory containing candidate screenshots
  • <output-dir> - Directory where the HTML report will be written

Output

  • HTML Report at output-dir/index.html - Visual comparison with side-by-side images and diffs
  • Diff Images at output-dir/*.png - Visual diff overlays for changed images

Exit Codes

  • 0 - All images match
  • 1 - Differences detected or files removed

CI Integration

The exit codes make this tool suitable for CI/CD pipelines. A non-zero exit code will fail your build when visual regressions are detected.

Requirements

  • Node.js >= 24.0.0
  • PNG images only

Contributing

See CONTRIBUTING.md for development setup and guidelines.