Developer Tools
100% client-side. Your data never leaves your browser — secure, private, and fast.
JSON Formatter
Format, validate and minify JSON — locally in your browser
Base64 Converter
Encode & decode Base64 strings — no data uploaded
URL Encoder
Encode & decode URLs with full UTF-8 support
JWT Decoder
Decode JWT tokens locally — never sent to a server
Timestamp
Convert Unix timestamps to dates and back instantly
UUID Generator
Generate cryptographically secure UUID v4 in bulk
Hash Generator
Calculate MD5 / SHA256 / SHA512 hashes securely
Regex Lab
Test & debug regular expressions with live matching
Browser-Side Developer Tools, No Tracking
Every tool on this site runs entirely inside your browser. Your input never touches a server — there is nothing to log, nothing to leak, and nothing to breach. That matters when you are debugging a JWT from production, hashing a customer record, or decoding Base64 from a support ticket.
The catalog covers the everyday building blocks of web and backend work: JSON formatting and validation, Base64 and URL encoding, JWT decoding, Unix timestamp conversion, UUID generation, cryptographic hashing (MD5, SHA-1, SHA-256, SHA-512), and regular expression testing. Each tool is a single page that loads in under a second on a cold cache — no login, no signup, no upsell.