BlazeDiff
Fast
1.5-4x faster than pixelmatch and odiff
Small
~700KB native binary, zero-dep JS core
Type-Safe
TypeScript support out of the box
Image and object diffing. Rust native binary with SIMD, pure JS core, perceptual metrics (SSIM, GMSD), structured interpret mode, and test framework matchers for Jest/Vitest/Bun.
Usage
Detect Differences
Original
Modified
Highlight and Explain
Original
Modified
Powering
Packages
@blazediff/core
Blazing-fast pixel-by-pixel image comparison with block-based optimization. 1.5x faster than pixelmatch.
@blazediff/core-native
Native Rust binaries with SIMD. The fastest image diff in the world.
@blazediff/ssim
Fast single-threaded SSIM (Structural Similarity Index) metric for CI visual testing.
@blazediff/gmsd
Fast single-threaded GMSD (Gradient Magnitude Similarity Deviation) metric for CI visual testing.
@blazediff/object
Blazing-fast object comparison with path tracking, cycle detection, and CREATE/REMOVE/CHANGE types.
@blazediff/cli
Command-line interface for image comparison.
@blazediff/jest
Jest matcher for visual regression testing.
@blazediff/vitest
Vitest matcher for visual regression testing.
@blazediff/bun
Bun test matcher for visual regression testing.
@blazediff/matcher
Core matcher logic for visual regression testing.
@blazediff/ui
Unstyled web components for displaying image differences.
@blazediff/react
React components for image comparison.
@blazediff/codec-sharp
Image codec using Sharp.
@blazediff/codec-pngjs
PNG image codec using pngjs.
@blazediff/codec-jsquash-png
WASM-based PNG image codec using @jsquash/png.