Developer Tools

Format, convert, encode, decode, and analyze data

A comprehensive suite of developer utilities running entirely in your browser. Format and validate JSON, encode and decode Base64 and URLs, test regular expressions, convert between YAML, JSON, and XML, generate cryptographic hashes, preview Markdown, and more — without sending any data to a server. Ideal for API keys, configuration files, and proprietary code.

JSON Formatter

Format, validate, and explore JSON with Monaco Editor, interactive tree view, and JSON Path filtering — all in your browser.

Base64 Encode/Decode

Encode text or files to Base64, decode Base64 back. Supports URL-safe variant and Data URI.

QR Code Generator

Generate QR codes for text, URLs, WiFi, contacts, and email — customize colors and download as PNG or SVG, all in your browser.

Password Generator

Create strong, random passwords with custom length and character sets. Cryptographically secure, in your browser.

Hash Generator

Compute MD5, SHA-1, SHA-256, SHA-512, SHA-3, CRC32 hashes and HMAC for text or files.

JWT Decoder

Decode JSON Web Tokens to inspect the header and payload. View claims and expiry. Local, private, no upload.

JSON Editor

Edit JSON visually in your browser — add, delete, rename, and retype nodes in an interactive tree, or edit raw text with syntax highlighting. Switch between Text, Tree, and Preview modes anytime.

UUID Generator

Generate random UUIDs (v4) in bulk. Choose uppercase, hyphens, or braces. Free, instant, in your browser.

URL Encode/Decode

Encode or decode URL components for safe use in web addresses.

CSV/JSON Converter

Convert between CSV and JSON formats instantly.

Unix Timestamp Converter

Convert Unix timestamps and dates with timezone, batch CSV, code snippets, and JWT decoding.

Color Converter

Convert colors between HEX, RGB, and HSL formats with live preview.

Regex Tester

Test regular expressions with real-time matching and highlighting.

Markdown Preview

Write Markdown and see a live HTML preview side by side.

Text Diff

Compare two texts and see line-by-line differences.

Case Converter

Convert text between UPPERCASE, lowercase, Title Case, camelCase, and more.

YAML ↔ JSON Converter

Convert between YAML and JSON formats.

JSON ↔ XML Converter

Convert between JSON and XML formats.

OCR Text Recognition

Extract text from images using optical character recognition.

Word Counter

Count words, characters, sentences, and paragraphs in your text instantly.

ZIP Extractor

Extract and preview ZIP archive contents online.

Lorem Ipsum Generator

Generate placeholder text by paragraphs, sentences, or words.

Number Base Converter

Convert numbers between binary, octal, decimal, hexadecimal and any base 2-36. Supports very large numbers.