Developer tools, instantly

Fast, private, open-source tools that run entirely in your browser.
No data ever leaves your machine.

Formatters

JSON Formatter & Validator

Format, beautify and validate JSON online. Free JSON formatter with syntax highlighting, error detection and minify support.

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Encoding

Base64 Encoder / Decoder

Encode and decode Base64 strings online. Free Base64 converter tool for developers.

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Encoding

URL Encoder / Decoder

Encode and decode URLs online. Free URL encoding tool with encodeURIComponent support.

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Crypto & Security

JWT Decoder & Debugger

Decode and inspect JWT tokens online. View header, payload and verify JWT signatures.

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Text

Regex Tester & Explainer

Test and debug regular expressions online. Real-time regex matching with explanation.

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Converters

Unix Timestamp Converter

Convert Unix timestamps to human-readable dates and vice versa. Free online timestamp tool.

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Generators

UUID Generator

Generate random UUIDs (v4) online. Free UUID generator tool for developers.

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Crypto & Security

Hash Generator

Generate MD5, SHA-256 and SHA-512 hashes online. Free hash generator tool.

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Converters

JSON to CSV Converter

Convert JSON to CSV and CSV to JSON online. Free JSON CSV converter tool.

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Converters

YAML to JSON Converter

Convert YAML to JSON and JSON to YAML online. Free YAML JSON converter tool.

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Formatters

SQL Formatter & Beautifier

Format and beautify SQL queries online. Free SQL formatter with syntax support.

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Text

Markdown Previewer

Preview and render Markdown online. Free Markdown editor with live preview.

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Encoding

HTML Entity Encoder / Decoder

Encode and decode HTML entities online. Free HTML entity converter tool.

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Text

Cron Expression Parser

Parse and explain cron expressions in human-readable format. Free cron parser tool.

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Converters

Color Converter

Convert colors between HEX, RGB, HSL and OKLCH formats. Free color converter tool.

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Converters

Number Base Converter

Convert numbers between binary, octal, decimal and hexadecimal. Free base converter.

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Generators

Lorem Ipsum Generator

Generate Lorem Ipsum placeholder text online. Free dummy text generator.

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Generators

QR Code Generator

Generate QR codes online. Free QR code generator with download support.

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Text

String Case Converter

Convert strings between camelCase, snake_case, kebab-case and more. Free case converter.

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Text

Text Diff Checker

Compare two texts and find differences. Free online text diff checker tool.

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Generators

Password Generator

Generate strong, secure passwords online. Free random password generator.

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