Developer Tools

Base64

Encode and decode Base64 strings with Unicode support

URL Encode / Decode

Encode and decode URL components with RFC 3986 percent-encoding

HTML Entity Encode / Decode

Encode and decode HTML entities including named, numeric, and hex forms

JWT Decoder

Decode and inspect JWT token headers and payloads without verification

UUID v4 Generator

Generate random UUID v4 identifiers using the Web Crypto API

UUID v7 Generator

Generate timestamp-sortable UUID v7 identifiers per RFC 9562

Hash Generator

Compute cryptographic hash digests using SHA-1, SHA-256, SHA-512, and MD5

Password Generator

Generate cryptographically secure passwords and passphrases

CUID2 Generator

Generate collision-resistant unique identifiers (CUID2 format)

JSON ↔ YAML

Convert between JSON and YAML formats with round-trip fidelity

Number Base Converter

Convert numbers between binary, octal, decimal, and hexadecimal

Unix Timestamp Converter

Convert Unix timestamps to human-readable dates and vice versa

Color Converter

Convert colors between HEX, RGB, and HSL formats

Markdown → HTML

Convert Markdown syntax to HTML

JSON Formatter

Format, validate, and pretty-print JSON with configurable indentation

SQL Formatter

Format and pretty-print SQL with configurable dialect and indentation

Regex Tester

Test regular expressions with match highlighting, capture groups, and ReDoS protection

Diff Checker

Compare two texts and display line-by-line differences

Cron Explainer

Parse and explain cron expressions with next run times

HTTP Header Inspector

Inspect the actual HTTP request headers your browser sends

User-Agent Parser

Parse User-Agent strings into browser, OS, and device type