Developer tools
Small, fast tools that do one job well. Everything runs in your browser, and nothing you paste is uploaded.
Scheduling
Cron Expression Explainer
Turn any cron schedule into plain English and preview its next 5 runs in your local time.
Open tool → AIRAG Chunk & Token Calculator
Estimate tokens, chunk count, overlap overhead and embedding cost for a RAG pipeline.
Open tool → APIsWebhook Payload Inspector
Pretty-print, explore and extract values from JSON webhook payloads.
Open tool → AuthJWT Decoder
Decode JSON Web Tokens, check expiry, spot risky claims and verify signatures locally.
Open tool →Looking for a hosted service instead?
The developer tools directory covers job schedulers and cron monitoring, workflow automation, vector databases and LLM observability. Each entry links back to the free tool that pairs with it.