Developer Utilities

Fast, private developer tools that run entirely in your browser: Base64, URL and HTML encoding, JSON/YAML, hashing, JWT decoding, UUID and password generation, QR codes and more.

Base64 Encode / Decode

Convert text to and from Base64 — runs in your browser.

URL Encode / Decode

Percent-encode or decode text for use in URLs.

HTML Entity Encode / Decode

Escape or unescape HTML entities (<, &, …).

JSON Formatter

Beautify, minify or validate JSON.

JWT Decoder

Decode a JWT's header and payload (signature not verified).

Hash Generator

Compute MD5, SHA-1, SHA-256 and SHA-512 of text.

Case Converter

Convert text between UPPER, lower, Title, camelCase, snake_case and more.

Word & Character Counter

Count words, characters, lines and estimated reading time.

UUID Generator

Generate random version-4 UUIDs.

Password Generator

Generate strong random passwords with custom character sets.

Timestamp Converter

Convert between Unix timestamps and human-readable dates.

Color Converter

Convert colors between HEX, RGB and HSL.

Number Base Converter

Convert a number between decimal, hex, octal and binary.

Slug Generator

Turn a title into a clean URL slug.

Lorem Ipsum Generator

Generate placeholder paragraphs, sentences or words.

Text Diff

Compare two blocks of text line by line.

CSV ↔ JSON

Convert CSV to a JSON array of objects and back.

Regex Tester

Test a regular expression against text and see the matches.

Cron Parser

Break down a cron expression and describe its schedule.

Markdown to HTML

Convert basic Markdown to HTML.

QR Code Generator

Generate a QR code from a URL or any text.

JSON ↔ YAML

Convert between JSON and YAML.

CSS Minifier

Strip comments and whitespace from CSS.

HTML Minifier

Collapse whitespace and comments in HTML.