Dev Bench
JSON, color, QR, passwords, encoding.
JSON Formatter & ValidatorPopular
Pretty-print, minify, sort keys, or catch syntax errors
Color Converter
HEX, RGB, HSL and CMYK, with a complementary color preview
QR Code GeneratorPopular
Turn text or a link into a scannable code, with color and error-correction control
Password GeneratorPopular
Random passwords with your own rules, with an option to exclude ambiguous characters
Base64 Encode / Decode
Convert text to and from standard or URL-safe Base64
URL Encode / Decode
Percent-encode a single value, or a full URL while preserving its structure
Password Strength Checker
Entropy-based strength with an estimated offline crack time
IP Address Lookup
Look up your own IP or any address (ipwho.is)
User Agent Checker
Parse your browser, OS and device type from the user agent string
Unix Timestamp Converter
Convert between Unix time (seconds or milliseconds) and a human-readable date
Cron Expression Parser
Describe a 5-field cron schedule (or @daily/@hourly shortcuts) and preview upcoming runs
Regex Tester
Test a pattern against sample text with highlighted matches and named groups
CSV ↔ JSON Converter
Convert between CSV/TSV/semicolon-delimited and JSON array-of-objects
HTML/CSS/JS Minifier & Beautifier
Quick whitespace-level minify or indent for snippets, with size savings
Barcode Generator
Generate Code128, Code39, EAN-13/8, UPC, ITF-14, MSI or Codabar barcodes
DNS Lookup
Look up A, AAAA, MX, TXT, NS and CNAME records for a domain
Domain Availability Checker
Best-effort check of whether a domain looks registered (WHOIS)
209 tools across 33 categories · 20 call a live API — everything else runs entirely in your browser.