Tools that boogie - right in your browser.
Free, secure and private browser tools: guitar tuner, JSON/YAML formatter and converter, regex checker, string escaper, date/time converter, JWT decoder, compass, level and on-screen ruler. 100% client-side - everything runs on your device and nothing is ever uploaded.
Guitar tuner
Tune by ear or by eye - live pitch from your microphone, on device.
Open tool →JSON format
Pretty-print, minify and validate JSON with exact error positions.
Open tool →JSON → YAML
Convert JSON to clean YAML - no round-tripping through a server.
Open tool →YAML format
Validate and re-format YAML, or convert it back to JSON.
Open tool →Regex
Check and build regular expressions - linted for the engine you target.
Open tool →String escape
Escape/unescape strings for JSON, JS, C, HTML, shell, URLs and more.
Open tool →Date & time
Convert timestamps: ISO, epoch, FILETIME, .NET ticks, Python, SQL - any timezone.
Open tool →Cron
Explain cron schedules in plain English and build them back - next fire times included.
Open tool →JWT
Decode, inspect, edit and re-sign JSON Web Tokens - HS/RS/ES, locally.
Open tool →Compass
A true-heading compass from your device sensors, rendered in real time.
Open tool →Ruler
A dual-edge on-screen ruler - metric left, imperial right - that calibrates itself from your screen.
Open tool →Level
Bubble-level from the accelerometer with degree precision.
Open tool →