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13 free utilities for formatting, encoding, generating and converting. Each runs locally in your browser and comes with a short guide.

Formatting & Data

Clean up, validate and compare structured text.

JSON Formatter & Validator

Pretty-print, validate, minify and sort JSON with readable error messages.

Regex Tester

Live match highlighting with capture groups, flags and ready-made patterns.

Text Diff Checker

Compare two texts line by line with additions and removals highlighted.

Encoding & Decoding

Move data between the formats that browsers, URLs and APIs expect.

URL Encoder / Decoder

Percent-encode or decode text, and split URLs into their parts.

Base64 Encoder / Decoder

UTF-8 safe Base64 encoding and decoding, URL-safe mode and file to data URL.

JWT Decoder

Inspect JWT headers, payloads and expiry times without sending the token anywhere.

Generators & Security

IDs, passwords and checksums made with your browser's own cryptography.

UUID Generator

Generate random v4 or time-ordered v7 UUIDs, up to 1,000 at once.

Password Generator

Strong random passwords with adjustable length, character sets and an entropy meter.

Hash Generator

MD5, SHA-1, SHA-256, SHA-384 and SHA-512 hashes of any text, instantly.

Text Utilities

Count, convert and tidy everyday writing.

Case Converter

Switch text between camelCase, snake_case, kebab-case, Title Case and more.

Word & Character Counter

Live word, character and sentence counts with reading time and keyword density.

Converters

Translate times and colours between formats.

Unix Timestamp Converter

Convert epoch seconds or milliseconds to dates and back, with a live clock.

Color Converter

Convert HEX, RGB, HSL and CMYK, with WCAG contrast checks.

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