Developer Tools

Free online developer tools — Format JSON, encode Base64, generate UUIDs, test regex, and more. 100% free, no signup, no watermark. All tools run in your browser for instant & private results.

Available Developer Tools

• .env File Generator

  Generate secure, formatted .env environment variable files with random JWT secrets, database connection strings, and API keys.

• Docker Compose Generator

  Visual generator for docker-compose.yml files. Configure PostgreSQL, Redis, Nginx, Node.js, and Python services with environment ports.

• Gitignore Generator

  Generate customized .gitignore files for Node.js, Python, Go, Rust, React, Next.js, and macOS/Windows system files.

• README Generator

  Create professional GitHub & GitLab README.md files with tech stack badges, license notices, installation steps, and shields.io tags.

• SQL Query Builder

  Visual query builder for SQL SELECT, INSERT, UPDATE, and DELETE statements with JOIN clauses and WHERE filters.

• JWT Inspector & Decoder

  Decode and inspect JSON Web Token (JWT) header, payload claims, expiration timestamps, and signature algorithms safely in your browser.

• CRON Expression Builder

  Visual 5-field CRON expression builder with human-readable schedule explanations and next execution predictions.

• UUID v4 & v7 Generator

  Generate bulk cryptographically secure UUID v4 and time-ordered UUID v7 strings online free. 1-click copy and JSON array export.

• URL Encoder & Decoder

  Encode or decode URLs online free. Convert special characters, spaces, and query parameters into percentage-encoded URI format.

• cURL to Code Converter

  Convert cURL commands to JavaScript fetch, Axios, Python requests, Go, or Rust code online free. 100% browser-side parsing.

• Regex Tester & Visualizer

  Test and debug Regular Expressions (Regex) online free. Real-time match highlighting, flag controls, and match group extraction.

• JWT Decoder & Inspector

  Decode JSON Web Tokens (JWT) online free. Inspect Header, Payload, and Signature parameters locally in your browser with expiration tracking.

• JSON Formatter

  Prettify minified JSON with syntax highlighting, error detection, and tree view.

• JSON Validator

  Check JSON syntax and pinpoint exact error locations with line numbers and suggestions.

• JSON to CSV

  Flatten nested JSON arrays into downloadable CSV spreadsheets instantly.

• CSV to JSON

  Parse CSV data into structured JSON arrays with proper type inference and formatting.

• XML Formatter

  Pretty-print minified XML with correct indentation and syntax coloring.

• Base64 Encoder & Decoder

  Encode text or files to Base64 and decode Base64 strings back to plain text.

• Base64 Decoder

  Paste a Base64 string and instantly get the original text or binary data.

• URL Encoder

  Encode special characters in URLs to make them safe for web transmission.

• URL Decoder

  Decode percent-encoded URL strings back to their original readable form.

• Regex Tester

  Test regular expressions with live match highlighting and capture group display.

• UUID Generator

  Generate UUID v4 identifiers one at a time or in batches up to 1000.

• Hash Generator

  Compute MD5, SHA1, SHA256, and SHA512 hashes from any input text securely.

• JWT Decoder

  Decode JSON Web Tokens to view the header, payload, and signature clearly.

• SQL Formatter

  Beautify and indent messy SQL queries with keyword-aware formatting and highlighting.

• CSS Minifier

  Strip whitespace and comments from CSS to produce compact production-ready code.

• JSON to TypeScript

  Convert JSON objects into clean TypeScript interfaces or Zod schemas instantly in your browser.