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jest-image-snapshot

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Spec score 7.6 #18 of 26 in Visual Regression Testing Software

Spec sheet

Purpose
A Jest matcher for comparing images, commonly used for visual regression testing.Read 4 Oct 2026 · github.com
License
The project states that contributions are governed by the Apache License 2.0.Read 4 Oct 2026 · github.com
Maker
American Express says it was founded in 1850 and is headquartered in New York.Read 4 Oct 2026 · americanexpress.com
Browser testing
The README shows using a browser screenshot as the image input in a visual test.Read 4 Oct 2026 · github.com
CI image storage
The README provides an example reporter that uploads failed diff images to an AWS S3 bucket for ephemeral environments.Read 4 Oct 2026 · github.com
Comparison methods
It supports pixel-by-pixel Pixelmatch comparison and structural similarity (SSIM) comparison, which the README describes as experimental.Read 4 Oct 2026 · github.com
Diff output
The matcher can create horizontal or vertical diff layouts and optionally print a base64 diff or an iTerm inline image to the console.Read 4 Oct 2026 · github.com
Installation
The README gives `npm i --save-dev jest-image-snapshot` as the installation command.Read 4 Oct 2026 · github.com
Jest compatibility
The README lists Jest versions 20 through 29 as a peer dependency and says versions below 20 are unsupported.Read 4 Oct 2026 · github.com
Noise handling
A configurable Gaussian blur can help address noise from scaling images at different resolutions.Read 4 Oct 2026 · github.com
Snapshots
It saves a baseline image on the first run and compares later test images against it.Read 4 Oct 2026 · github.com
Thresholds
Users can set per-pixel sensitivity and an overall failure threshold measured in pixels or percent.Read 4 Oct 2026 · github.com
TypeScript support
The README says the community-maintained DefinitelyTyped definitions may be outdated or inaccurate and are not officially supported by the maintainers.Read 4 Oct 2026 · github.com
Update baselines
Jest’s `--updateSnapshot` or `-u` option updates stored image snapshots.Read 4 Oct 2026 · github.com

Plans and prices

Open source package Free Jest >=20 and <=29 peer dependency · Install with npm Read 4 Oct 2026 · github.com

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