Palette + Contrast

Generate a tint+shade scale and check WCAG contrast.

Base color

Contrast

AA

Sample text

Ratio

5.11

WCAG

AA

Tints & shades

Click any swatch to make it the new base.

Generators

Random RFC 4122 identifiers

Password Generator

Strong, configurable passwords

Placeholder filler text

Encode text into a QR code

Fake names, emails, phones

Format

Pretty-print, minify and validate

Markdown Editor

Write and preview Markdown

Test patterns with live highlights

Compare two blocks of text

Convert between CSV and JSON

Convert between YAML and JSON

HTML ↔ Markdown

Convert HTML to Markdown and back

camel · snake · kebab · slug

Words, characters, reading time

Encode

Encode and decode base64

Percent-encode URL components

SHA-1, 256, 384, 512

Inspect a JSON Web Token

Encode/decode HTML entities

bin · oct · dec · hex

Parse Cookie / Set-Cookie headers

Data

Color Converter

HEX · RGB · HSL · OKLCH

Palette + Contrast

Tints, shades, WCAG ratio

Epoch ↔ ISO ↔ human

Pleasant clock, with timezones

Cron Expression

Humanize cron + next runs

Subnet math, range, mask

Look up HTTP status codes

Parse a browser UA string

Image Compressor

Resize, compress, convert