Free Online Developer Tools

Fast, free, privacy-friendly developer tools that run entirely in your browser. No data leaves your device.

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Developer

JSON Formatter

Format, beautify, minify, and validate JSON data instantly. Supports syntax highlighting and error detection.
B64
Developer

Base64 Tool

Encode text to Base64 or decode Base64 strings instantly. Supports UTF-8 and binary data.
%20
Developer

URL Encoder

Encode or decode URLs and query strings. Handles special characters, spaces, and Unicode.
Wc
Text

Word Counter

Count words, characters, sentences, paragraphs, and estimate reading time instantly.
Li
Text

Lorem Ipsum

Generate placeholder text for designs and mockups. Choose paragraphs, sentences, or words.
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Security

Password Generator

Generate cryptographically secure random passwords with custom length and character sets.
#c
Design

Color Converter

Convert colors between HEX, RGB, and HSL formats. Includes a color picker and live preview.
Aa
Text

Case Converter

Convert text between UPPERCASE, lowercase, Title Case, camelCase, snake_case, kebab-case, and more.
#h
Security

Hash Generator

Generate MD5, SHA-1, SHA-256, and SHA-512 hashes from any text input.
ID
Developer

UUID Generator

Generate random UUIDs (v4) instantly. Bulk generate up to 1000 UUIDs at once.
/.*/
Developer

Regex Tester

Test regular expressions with real-time matching, highlighting, and match group extraction.
MD
Text

Markdown Preview

Write Markdown and see the rendered HTML preview in real-time. Supports GitHub Flavored Markdown.