Free tools
Small tools for recurring work.
The questions that come up before any schedule runs: when exactly, what will it cost, and can the delivery be trusted. Each tool works in your browser, free, with no account.
Cron schedule builder
Build a five-field cron expression, read it back in plain language, and preview the next runs in any IANA timezone — the same schedule format routines use.
Open the toolAI cost calculator
Estimate what a recurring AI job costs per run and per month from token counts and model rates, and see which published plan allowance covers it.
Open the toolWebhook signature tester
Sign and verify HMAC-SHA256 webhook signatures entirely in your browser, including the timestamped v1 scheme signed result webhooks use.
Open the toolStart with Free