# n7olkachev/imgdiff

Faster than the fastest in the world pixel-by-pixel image difference tool.

Repository: https://github.com/n7olkachev/imgdiff
Canonical: https://ross.abutalabs.com/products/imgdiff
Language: Go
License: MIT
License Family: permissive
Last push: 2021-03-25T08:02:58+00:00

## Health v2 (maintenance only)
Score: 23/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 0, release rhythm 8, longevity 100
- inputs: {"age_days": 2090, "days_push": 1987, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1706, forks 69 (observed 2026-08-28T04:05:24.965862+00:00)

## What it is
imgdiff is a fast command-line tool written in Go that compares two images pixel-by-pixel and optionally renders a visual diff output image. It is a performance-focused alternative to odiff, claiming roughly 3x faster comparisons on large images.

## Use cases
- compare two png images pixel by pixel
- generate a visual diff image of two screenshots
- visual regression testing for web ui screenshots
- detect layout changes between two images
- fast image diffing in ci pipelines

## When to choose
- you need the fastest available pixel-by-pixel image comparison from the command line
- you want a simple single-binary tool with no runtime dependencies
- you need visual diff output for screenshot testing workflows

## When to avoid
- you need a library API to embed in your own application rather than a CLI
- you need active development or recent bug fixes since the last release was in 2021
- you need to compare image formats beyond what the tool supports

## Facets
- artifact type: cli-tool
- maturity: maintenance
- function: image-processing, cli, testing
- domain: developer-tools, image-processing, testing
- platform: windows, cli, cross-platform
- tags: pixel-diff, visual-regression, png, image-comparison, go, command-line, linux, macos

## Member repositories
- n7olkachev/imgdiff (main) score 23

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:05:24.965862+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T03:37:29.988480+00:00, confidence not recorded.
  - readme: https://github.com/n7olkachev/imgdiff (fetched 2026-08-28T04:05:24.965862+00:00, sha bf5e9815687f)
- Data as of 2026-08-30T08:39:29.467469+00:00.