Essential tools for developers - JSON, JWT, Base64, regex, and more
Essential free online developer tools. Format JSON, decode JWT tokens, encode Base64, test regex patterns, generate UUIDs, and more. Works in your browser.
Format, validate, and minify JSON
Decode and inspect JWT tokens instantly
Encode and decode Base64 strings instantly
Test and debug regular expressions in real-time
Generate SHA-1, SHA-256, SHA-512 hashes instantly
Convert Unix timestamps to dates and back
Generate UUIDs (GUIDs) v4, v1, and more instantly
Generate placeholder text instantly
Generate strong, secure passwords instantly
Generate .gitignore files for any tech stack
Build and understand cron expressions visually
Generate professional README files instantly
Generate marketing copy, SEO content, and written materials with AI
10 toolsColor palettes, gradients, shadows, and visual design tools
3 toolsPractical tools for everyday tasks - QR codes, compression, and more
3 toolsConvert, compress, merge, split, and transform PDF documents
6 tools