Outils gratuits en ligne

15+ outils gratuits pour développeurs et créateurs. Chaque outil fonctionne dans votre navigateur — pas de téléversement, pas d'inscription, pas de télémétrie.

Outils pour développeurs

3 outils

Format, encode, and inspect data the way developers actually do.

JSON Formatter & Validator

Beautify, minify, and validate JSON instantly in your browser. 100% client-side, no upload.

Hash Generator

Compute MD5, SHA-1, SHA-256, SHA-384, and SHA-512 hashes in your browser. No upload.

JWT Decoder

Decode JSON Web Tokens in your browser — inspect header, payload, and signature without a server round-trip.

Encodeurs et décodeurs

2 outils

Move data between encodings — Base64, URL, percent — without leaving the browser.

Base64 Encode / Decode

Encode text or bytes to Base64 and decode Base64 back to text. UTF-8 safe, runs locally.

URL Encode / Decode

Percent-encode and decode URLs and components. Handles UTF-8, query strings, full URLs.

Générateurs

2 outils

Spin up passwords, UUIDs, and other identifiers with cryptographic randomness.

UUID Generator

Generate RFC 4122 v4 UUIDs in bulk using the browser crypto API. No server, no duplicates.

Password Generator

Generate strong, random passwords with custom length and character sets. Client-side only.

Outils d'image

3 outils

Create and tweak images for web, print, and mobile.

QR Code Generator

Generate QR codes for URLs, text, Wi-Fi, and contacts. Download as PNG or SVG.

Image Compressor

Shrink JPG, PNG, or WebP images in your browser — pick quality and max width, see the savings before download.

Color Picker

Pick a color and see HEX, RGB, HSL, and HSV values instantly. Browser-native, no upload, no signup.

Outils de texte

3 outils

Manipulate text — case, count, placeholder, transform.

Lorem Ipsum Generator

Generate placeholder text by paragraph, sentence, or word count. Classic Lorem Ipsum source.

Case Converter

Convert text between UPPER, lower, Title, camelCase, snake_case, kebab-case, PascalCase, and CONSTANT_CASE.

Word & Character Counter

Count words, characters, sentences, paragraphs, and estimated reading time. Runs locally, no upload.

Convertisseurs

2 outils

Convert between units, formats, and markup — length, mass, temperature, Markdown, and more.

Unit Converter

Convert between metric and imperial units — length, mass, temperature, volume, time, and digital storage.

Markdown to HTML

Render Markdown to HTML in your browser. Live preview, sanitized output, and one-click copy.