Developer & Data
Format, test, encode and convert the data developers touch every day.
JSON / Data Toolkit
Validate, format, minify and inspect JSON instantly.
Regex Tester
Test regular expressions with live matches and groups.
Base64 / URL / HTML Encoder-Decoder
Encode and decode Base64, URL and HTML entities.
Hash / Checksum Tool
Compute SHA-256/384/512 for text or files, plus CRC32 for text.
Unix Timestamp / Date Converter
Convert between Unix time and human-readable dates.
Cron Expression Builder
Build and read 5-field cron schedules in plain English.
URL Slug Generator
Turn a title into a clean URL path segment.
Base64 Encoder & Decoder
Encode or decode UTF-8 text as Base64 locally.
URL Encoder & Decoder
Escape URL components and decode percent-encoded text.
UUID v4 Generator
Generate random UUIDs with the browser crypto API.
JWT Decoder
Inspect token header and payload without verifying a signature.
URL Parser
Break a URL into host, path, query and fragment.
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The most common tasks in developer & data can be handled with these tools.
Community help
Compare approaches, ask questions and share results with other visitors.
Browse developer discussionsOther categories
PC & Hardware
Size a power supply, plan storage, and reason about memory and bandwidth.
Networking & Internet
Plan subnets and estimate transfer times without guesswork.
Files, Images & Text
Inspect, transform and clean up files and text — all in your browser.
Security & AI Utilities
Measure password strength and estimate API costs with full transparency.