Free Online Developer Tools

Fast, free, and open-source tools for developers. No sign-up required. Just paste, click, and go.

Formatters

{ }

JSON Formatter & Validator

Format, validate, and beautify JSON data online.

SQL

SQL Formatter

Format and beautify SQL queries online.

Encoders

B64

Base64 Encode & Decode

Encode and decode Base64 strings online.

URL Encode & Decode

Encode and decode URL strings online.

HTML Entities Encoder

Encode and decode HTML entities online.

Converters

Y{}

JSON to YAML Converter

Convert between JSON and YAML formats online.

🎨

Color Converter

Convert colors between HEX, RGB, and HSL formats.

Testers

Regex Tester

Test and debug regular expressions online.

Generators

Hash Generator

Generate MD5, SHA-1, SHA-256, and SHA-512 hashes online.

◐

CSS Gradient Generator

Create CSS linear and radial gradients visually.

.gi

.gitignore Generator

Generate .gitignore files by selecting your tech stack.

Lorem Ipsum Generator

Generate Lorem Ipsum placeholder text.

🔑

Password Generator

Generate strong random passwords online.

QR Code Generator

Generate QR codes from text or URLs online.

Viewers

Markdown Preview

Preview Markdown rendered as HTML in real time.

Decoders

JWT

JWT Decoder

Decode and inspect JSON Web Tokens online.