Test & Inspect
Free test & inspect tools that run entirely in your browser — nothing you paste is sent anywhere.
Diff Checker
Compare two blocks of text line by line and see exactly what was added, removed or changed. Runs entirely in your browser.
Unix Timestamp Converter
Convert a Unix timestamp to ISO 8601, UTC, local and relative time, or turn any date back into one. Auto-detects seconds vs milliseconds, in your browser.
Cron Expression Builder & Explainer
Parse, validate and explain a 5-field cron expression in plain English, and preview the next run times in UTC. Runs entirely in your browser.
Regex Tester
Test regular expressions live in your browser. Highlight every match, inspect captured groups and indices, toggle flags. Nothing you type is sent anywhere.