timgioh/PromptLab-Local-First-LLM-Prompt-Testing-in-Your-Browser

A lightweight, local-first Chrome sidepanel extension to test and evaluate LLM prompt fixtures across OpenAI, Anthropic, and OpenRouter. Features direct browser-to-API requests, real-time token tracking, zero telemetry, and pure BYOK (Bring Your Own Key) privacy. Built with React, TypeScript, and Vite.

1 best points · 0 comments · 1 Hacker News post · 2 GitHub stars · View on GitHub

Hacker News discussions

• Show HN: PromptLab – Local-first Chrome sidepanel for LLM prompt testing (1 points, 0 comments, by Konstantinsio, 2026-09-01)