Developer Tools
Free, client-side developer utilities. No signup, no data sent anywhere.
Formatters
JSON Formatter & Validator
Format, prettify and validate JSON data online. Free JSON formatter with syntax checking.
SQL Formatter
Format and beautify SQL queries online. Uppercase keywords, indent clauses for readability.
Markdown Preview
Preview Markdown as HTML in real time. Live markdown renderer for documentation and notes.
CSS Minifier / Beautifier
Minify and beautify CSS online. Reduce file size by removing whitespace and comments.
Encoders & Decoders
Base64 Encode / Decode
Encode and decode Base64 and Base64URL strings online. Toggle between standard Base64 and URL-safe Base64URL with real-time conversion.
URL Encode / Decode
Encode and decode URLs online. Percent-encoding and decoding for query strings.
JWT Debugger
Decode, inspect and verify JSON Web Tokens. View claims with OIDC descriptions, verify signatures with HS256/RS256/ES256, and auto-fetch public keys from OIDC issuers.
HTML Entity Encode / Decode
Encode and decode HTML entities online. Escape and unescape HTML characters.
Generators
UUID Generator
Generate random UUIDs (v4) online. Bulk UUID generation with one click.
Hash Generator
Generate SHA-1, SHA-256, and SHA-512 hashes online. Free cryptographic hash tool.
Lorem Ipsum Generator
Generate lorem ipsum placeholder text online. Choose paragraphs, sentences or words.
Password Generator
Generate strong, random passwords and passphrases online. Strength meter, configurable character sets, and word-based passphrase mode.
QR Code Generator
Generate QR codes from any text or URL online. Download as PNG or SVG.
Converters
Unix Timestamp Converter
Convert Unix timestamps to dates and back. UTC and local time support.
Color Converter
Convert colors between HEX, RGB, and HSL formats online.
Number Base Converter
Convert numbers between decimal, hexadecimal, octal and binary online.
Text Case Converter
Convert text between camelCase, PascalCase, snake_case, kebab-case, UPPER, lower, Title and Sentence case.
YAML ↔ JSON Converter
Convert YAML to JSON and JSON to YAML online. Instant bidirectional conversion.
JSON to TypeScript
Convert JSON objects to TypeScript interfaces and types online. Instant type generation.