Browser-first utilities
Technical rules, made clear.
Focused tools for the details you need often but should not have to memorize.
Open Cron DebuggerAvailable now
Tools
Time & Scheduling Cron Debugger Generate, validate, explain, and preview upcoming runs for Cron expressions. Open tool Time & Scheduling Timestamp Converter Convert Unix seconds and milliseconds to local or UTC ISO dates, and convert ISO dates back to timestamps. Open tool Time & Scheduling Time Zone Converter Convert a local date and time between IANA time zones with daylight-saving changes handled correctly. Open tool Text & Data JSON Formatter Validate, format, minify, and recursively sort JSON in your browser with precise error locations. Open tool Text & Data Base64 Converter Encode UTF-8 text to Base64 or decode standard and URL-safe Base64 back to text. Open tool Web & URLs URL Codec Encode and decode URL components, complete URLs, and form values with batch line processing. Open tool Security & Identity UUID Generator Generate cryptographically secure UUID v4 and v7 values, validate UUID text, and inspect version, variant, and v7 timestamps locally. Open tool Security & Identity Hash Generator Generate SHA-256, SHA-384, and SHA-512 hashes for text or local files with hexadecimal or Base64 output. Open tool SEO & Webmaster SEO Meta Generator Generate escaped title, description, canonical, robots, Open Graph, and Twitter metadata with local search and social previews. Open tool
Why use these tools
Your input stays in the browser
Tool calculations run in your browser. Expressions and other inputs are not sent to the application server.
Why use these tools
Built for repeat use
The interface favors immediate feedback, clear validation, and results you can inspect before using them elsewhere.
Browse by use case
Directory
Time & SchedulingBuild and inspect time-based rules.NetworkingCalculate and inspect network values.Text & DataParse, validate, and transform structured text.Web & URLsInspect and generate web platform and URL values.SEO & WebmasterPlan search and social metadata for websites.Security & IdentityGenerate and inspect security credentials and identifiers.