Outils Developer

Tools for developers: formatters, converters, generators

Outils en ligne pour développeurs

JSON Formatter

Format, validate, and minify JSON data with syntax highlighting and error detection.

Base64 Encode/Decode

Encode or decode text and files in Base64 format instantly.

Hash Generator

Generate MD5, SHA-1, SHA-256 and SHA-512 cryptographic hashes for any text.

UUID Generator

Generate one or more unique UUID v4 identifiers instantly.

HTML Minifier

Minify HTML code by removing whitespace, comments and redundant attributes.

CSS Minifier

Minify and compress CSS stylesheets to reduce file size.

JavaScript Minifier

Minify and compress JavaScript code to reduce file size and speed up your site.

Password Generator

Generate strong, secure passwords with customizable length and character set.

Color Converter

Convert colors between HEX, RGB, HSL and CMYK formats with a live preview.

URL Encode / Decode

Encode or decode URLs and query parameters for safe use in web addresses.

HTML Entities Encode / Decode

Convert special characters to HTML entities and back.

SQL Formatter

Format, beautify, and minify SQL queries with keyword highlighting.

JWT Debugger

Decode JWT tokens and analyze header, payload, claims, and expiration without sending your secret key.

XML Formatter & Validator

Format, validate, and minify XML documents with proper indentation and error detection.

Unit Converter

Convert units of length, weight, temperature, volume, area, speed, and digital data with high precision.

YAML ↔ JSON Converter

Convert between YAML and JSON formats instantly with proper formatting.

Regex Tester

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

Number Base Converter

Convert numbers between binary, octal, decimal, and hexadecimal bases.

Cron Expression Parser

Decode Cron expressions into human-readable language and view upcoming task runs in your selected time zone.

Hash Generator

Generate MD5, SHA-1, SHA-256, SHA-512, and other hash digests from text.

Time Zone Converter

Convert dates and times between time zones and compare times across multiple cities simultaneously.

Chmod Calculator

Calculate Unix file permissions — convert between numeric (755) and symbolic (rwxr-xr-x) notation.

CSS Gradient Generator

Create beautiful CSS gradients — linear, radial, or conic. Get ready-to-use CSS and Tailwind code.

Pomodoro Timer

Boost productivity with the Pomodoro technique — 25-minute focus sessions with short breaks.

Free online developer tools for programmers, engineers, and web developers. Format JSON, encode and decode Base64, generate UUIDs, minify CSS, HTML and JavaScript, debug JWT tokens, test regular expressions, and much more — all from your browser with no installation required.

Key Features

  • JSON Formatter — beautify, validate, and minify JSON data with syntax highlighting and error detection for quick debugging.
  • Base64 Encode/Decode — convert text and binary data to and from Base64 encoding, essential for working with APIs, emails, and embedded assets.
  • Color Converter — translate colors between HEX, RGB, HSL, and CMYK formats with a live preview swatch.
  • UUID Generator — create universally unique identifiers (v4) for databases, APIs, and distributed systems.
  • Password Generator — generate strong, cryptographically random passwords with customizable length and character sets.
  • CSS, HTML & JS Minifiers — reduce file sizes by stripping whitespace, comments, and redundant code to speed up page loading times.
  • MD5 Generator — compute MD5 hash checksums for file integrity verification and quick data comparison.
  • JWT Debugger — decode and inspect JSON Web Tokens, view header and payload claims, and verify token structure.
  • Regex Tester — write, test, and debug regular expressions with real-time matching, capture groups, and pattern explanations.
  • Cron Parser — translate cron schedule expressions into human-readable descriptions and preview upcoming execution times.
  • Unit Converter & Time Zone Converter — convert between measurement units and compare times across global time zones.

Who Uses These Tools

  • Full-stack developers who debug JSON payloads, JWT tokens, and API responses every day.
  • DevOps engineers scheduling cron jobs and generating secure passwords for infrastructure.
  • Frontend developers minifying assets, converting colors, and testing regex patterns for form validation.
  • Students learning to code who need quick utilities without complex setup.

Every developer tool works instantly in the browser — paste your data, get results, and copy them to your clipboard. Combine these with our text tools and network tools for a complete online development toolkit.

Other Categories

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