Number Base Converter

Convert between binary, octal, decimal, and hexadecimal.

Input

Value

From base

All bases

255

Binary (2)

11111111

Octal (8)

377

Decimal (10)

255

Hex (16)

ff

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