dmtrKovalenko/odiff

Health v2 · maintenance only

Adoption not part of the score

3173 stars · 115 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-29, confidence not recorded

ODiff is a very fast pixel-by-pixel image comparison library and CLI tool written in Zig with SIMD optimizations (SSE2, AVX2, AVX512, NEON). It supports cross-format comparison of PNG, JPEG, WebP, and TIFF images with features like anti-aliasing detection and region ignoring, plus a Node.js API.

Use cases

• compare two images pixel by pixel
• visual regression testing for screenshots
• generate diff images between snapshots
• compare jpg and png images
• detect visual differences in UI screenshots
• snapshot testing for web apps
• fast image diffing in CI

When to choose

• you need millisecond image comparisons in a test suite or CI pipeline
• you need cross-format comparison (e.g. jpg vs png) or anti-aliasing-aware diffs
• you want a native tool with a Node.js API and low memory footprint

When to avoid

• you need perceptual hashing or image similarity search rather than strict pixel comparison
• you need a pure-JS solution without native binaries
• you work with formats outside png/jpeg/webp/tiff

Facets

library · maturity active

image-processing testing cli image-processing testing developer-tools cross-platform cli visual-regression snapshot-testing pixel-diff simd zig visual-testing nodejs

Member repositories

For agents

markdown · JSON · MCP: product_card(name="dmtrKovalenko/odiff")