Visual Regression Python Packages

saccade-vision

Visual-regression CLI for renderers using NVIDIA FLIP, with exact identity proofs, timing checks and a GitHub Action

fxcss

🦊 Live-reload, inspect and screenshot-test Firefox userChrome.css themes

visual-comparison

Publised on PyPI Repository that compares two images with the same sizes and shows the differences visually by drawing rectangles. Useful for Visual Regression UI Automation Testings.

agentvision

Eyes for AI coding agents 👁️ — render → perceive → report → fix → re-render. A machine-graded visual feedback loop (DOM/contrast/OCR-grounded + optional vision LLM) agents consume to self-correct before claiming done.

qa-screens

MCP server for visual QA: SSIM screenshot diffs for AI-driven refactoring, with OAuth/session support for apps

sentinel-agent

AI-driven functional testing agent. Web + visual regression + accessibility in v0.1.

pybrowserstack-screenshots

api wrapper and python client for Browserstack Screenshots, including phantomCSS support

visual-regression-scanner

Terminal UI for detecting visual regressions on websites. Captures full-page screenshots from a sitemap and compares them against stored references using pixel diff

selenium-screenshot-compare

Compare a website's rendering between two Firefox versions through a navigation scenario: open the site in both versions in parallel, click on buttons/links (Selenium-style keywords), and at each step capture both full-page renders and measure their difference

visual-guard

Visual regression detection that catches UI shifts DOM assertions miss

snapvisor

Python SDK for Snapvisor visual regression testing

wayback-diff

Intelligent web page comparison tool with Wayback Machine support and visual regression testing

snapshot-site-sdk

Capture screenshots, run pixel-accurate visual diffs, and get AI page analysis from Python — for QA suites, batch jobs, and data pipelines.