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reg-suit

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What reg-suit is

reg-suit is a free command-line tool for visual regression testing. It compares current images with earlier snapshots and produces an HTML report of differences. The CLI runs locally or with CI services, while snapshots can be stored in external cloud storage such as Amazon S3 or Google Cloud Storage. In GitHub-flow projects, reg-suit identifies a topic branch’s parent commit and uses that commit’s snapshot as the expected result. A GitHub app can post comparison results in pull requests, and notifier plugins support commit statuses, GitLab merge requests, GitHub Enterprise pull requests, Slack incoming webhooks, and Chatwork. Configuration includes difference and matching thresholds, antialias handling, and parallel comparison concurrency. An optional x-img-diff-js report can describe structural changes such as inserted or moved image areas. Setup uses npm installation, project initialization, and test-image runs. The MIT-licensed project was founded in 2017.

Who it suits

reg-suit suits developers maintaining image-based visual checks in local or CI workflows. It fits projects using tools such as Puppeteer, React, Angular, Vue, Storybook, or Sketch previews.

What it does well

  • Free command-line visual regression testing
  • Runs locally and with CI services
  • Cloud snapshot storage support
  • Pull request and chat notifications
  • Configurable comparison thresholds

What to know first

  • No cross-browser capture
  • Requires command-line setup
  • External cloud storage is used for snapshots

Getting started

  1. Install reg-suit globally with npm
  2. Initialize reg-suit in your project
  3. Configure snapshot storage and comparison settings
  4. Connect any required notifier plugins
  5. Run reg-suit against your test images
  6. Review the generated HTML difference report

Verdict

reg-suit focuses on snapshot comparison, HTML difference reports, and development-workflow notifications.

Questions

How much does reg-suit cost?

It is free and has a free plan.

Where can it run?

The command-line tool works on a local machine and with CI services.

Where are snapshots stored?

Snapshot images are stored in external cloud storage, including AWS S3 and Google Cloud Storage.

Which integrations are available?

Listed plugins support GitHub, GitLab, GitHub Enterprise, Slack, Chatwork, AWS S3, and Google Cloud Storage.

Does it support cross-browser capture?

No. Cross-browser capture is not supported.

What license does it use?

The project README states that reg-suit is licensed under MIT.

Facts from reg-suit's own pages

Branch comparison
Its GitHub-flow support detects the parent commit of a topic branch and uses that commit’s snapshot as the expected comparison result. · reg-viz.github.io, 7 Oct 2026
Comparison controls
Configuration supports difference thresholds, antialias handling, matching thresholds, and parallel comparison concurrency. · github.com, 7 Oct 2026
Detailed differences
An optional x-img-diff-js engine can show structural information about image differences, including inserted or moved parts. · github.com, 8 Oct 2026
Founded
2017 · reg-viz.github.io, 28 Sept 2026
GitHub flow
The GitHub flow feature detects a topic branch’s parent commit and uses that commit’s snapshot as the expected comparison result. · reg-viz.github.io, 8 Oct 2026
GitHub integration
The GitHub app can post comparison results as pull request comments; the repository also describes commit-status notifications through its GitHub notifier plugin. · github.com, 7 Oct 2026
GitHub notifications
With the GitHub app and notifier plugin, results can be sent as commit status and pull request comments. · github.com, 8 Oct 2026
Image comparison
Its configuration supports difference thresholds, antialias handling, and parallel comparison processes. · github.com, 8 Oct 2026
Integrations
Listed plugins support S3, Google Cloud Storage, GitHub, GitLab, Slack, and Chatwork. · github.com, 8 Oct 2026
Intended users
The site presents reg-suit for projects that need image-based visual regression testing, including example projects using Puppeteer, React, Angular, Vue, Storybook, and Sketch previews. · reg-viz.github.io, 7 Oct 2026
License
The repository identifies the project as MIT licensed. · github.com, 8 Oct 2026
Local and CI use
The maker says reg-suit works with CI services and on a local machine. · reg-viz.github.io, 8 Oct 2026
Other integrations
Listed notifier plugins support GitLab merge request comments, GitHub Enterprise pull request comments, Slack incoming webhooks, and Chatwork. · github.com, 7 Oct 2026
Project audience
The maker provides examples for projects using Puppeteer, React, Angular, Vue.js, Storybook, and Sketch previews. · reg-viz.github.io, 8 Oct 2026
Purpose
reg-suit is a command-line tool for visual regression testing that compares current images with previous images and creates an HTML report of differences. · reg-viz.github.io, 8 Oct 2026
Security
The repository page links to a security policy; the opened page does not state specific certifications or compliance claims. · github.com, 8 Oct 2026
Setup
The documented setup installs reg-suit with npm, then initializes it in a project and runs it from the command line. · reg-viz.github.io, 8 Oct 2026
Snapshot storage
It can store snapshots in external cloud storage such as AWS S3 or Google Cloud Storage. · github.com, 8 Oct 2026
Support and contribution
The repository says pull requests are welcome; the pages opened do not state a paid support offering. · github.com, 7 Oct 2026
Where it runs
The CLI works with CI services and on a local machine. · reg-viz.github.io, 7 Oct 2026

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