Free Developer Tools
Free Online Developer Tools
10+ free utilities for developers. Format JSON, decode JWT, generate cron expressions, test regex, and more. No ads, no tracking, works offline.
AllDataDevOpsSecurityDatabaseBusinessDevelopmentContentEncodingDesign
Popular
JSON Formatter
Format, validate, and beautify JSON data with Monaco Editor syntax highlighting. Auto-fix common errors.
Data40K searches/mo
Popular
Cron Generator
Generate and explain cron expressions with next run preview. Supports standard and extended formats.
DevOps22K searches/mo
Popular
JWT Decoder
Decode and verify JWT tokens with HMAC signature validation. Inspect header, payload, and verify secrets.
Security18K searches/mo
SQL to Prisma
Convert SQL schemas to Prisma schema definitions. Supports PostgreSQL, MySQL, and SQLite.
Database
Popular
GST Calculator
Calculate GST for Indian invoices with rate breakdown. Supports multiple GST rates and reverse calculation.
Business
UPI QR Generator
Generate UPI payment QR codes for Indian businesses. Customizable amount and merchant details.
Business
Popular
Regex Tester
Test and debug regular expressions with real-time matching. Reference guide and common patterns included.
Development
Markdown to HTML
Convert Markdown to clean HTML instantly. GitHub flavored markdown support with live preview.
Content
Popular
Base64 Encoder
Encode and decode Base64 strings and files. Supports Unicode and binary file encoding.
Encoding
Color Palette
Generate beautiful color palettes for your projects. Export to CSS, JSON, or Tailwind config.
Design