Show HN: Catcher – An AI web testing tool where most tests never hit the API

Category: devtools

Tags: ai-testing, web-testing, playwright, electron, typeScript, testing-tool

Score: 6.5/10 (Innovation: 6, Technical: 7, Documentation: 7, Utility: 6)

Catcher is an open-source, local-first AI web testing tool that allows users to describe tests in natural language and execute them in a real browser on their machine. It stands out by being a desktop app with BYOK LLM support, vision-coordinate fallback for robust element selection, and a design that minimizes API calls by using heuristics for simple steps. This approach offers privacy, cost control, and resistance to flaky selectors, making it a practical alternative to cloud-based AI testing services.

Target audience: backend devs, frontend devs, QA engineers

Repository: https://github.com/Catcher2026/Catcher · TypeScript · MIT · 2 stars

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