Free Developer Tools Online — No Signup Required

17 free tools — no login required

A full suite of free browser-based developer utilities: format and validate JSON, encode URLs, generate UUIDs, minify CSS and JavaScript, test regular expressions, convert markdown, and more. Everything runs client-side so your code never leaves your machine.

JSON Formatter

Beautify and validate JSON code

Popular

XML Formatter

Format, beautify, and validate XML documents with customizable tree indentation.

SQL Formatter

Format SQL queries for better readability

HTML Encoder/Decoder

Encode or decode HTML entities

URL Encoder/Decoder

Encode or decode URL query strings and URI components with UTF-8 precision.

Popular

Cron Job Generator

Create cron schedules easily via UI

UUID Generator

Generate cryptographically random UUID v4 and v1 identifiers in bulk.

CSS Minifier

Minify CSS code to reduce file size

JS Minifier

Minify JavaScript code efficiently

JSON Minifier

Minify JSON to reduce file size

Base64 Decoder

Decode Base64 encoded data strings back into readable plain text or binary.

Popular

Regex Tester

Test regular expressions in real-time

Markdown to HTML

Convert Markdown syntax into clean semantic HTML markup with live preview.

HTML to Markdown

Convert HTML to Markdown format

Random Number Generator

Generate random numbers in a range

Color Converter

Convert between HEX, RGB, HSL colors

CSS Gradient Generator

Create modern linear and radial CSS background gradients with visual color stops.

Why Use These Tools?

No installation, no account, and works on any device. All processing happens in your browser.