Free developer tools
Small, fast tools with no signup and no tracking of what you type.
Cron Expression Explainer
Turn any cron expression into plain English and see its next run times.
Regex Tester & Explainer
Test a regular expression live, highlight matches and groups, and see each part explained.
Unix Timestamp Converter
Convert Unix timestamps (seconds or milliseconds) to dates and dates back to timestamps.
AI Token & Cost Estimator
Estimate how many tokens a text uses and what an AI API request would cost.
.gitignore Generator
Combine ready-made .gitignore templates for your languages, frameworks, editors and OS.