All developer tools

Every developer tool, by category. All free, and everything runs on your device.

Format

8 tools

JSON formatter

Format, validate, tree

YAML ↔ JSON

Both directions

XML formatter

Indent, validate, minify

SQL formatter

Readable queries

HTML formatter

Beautify or minify

CSS formatter

Beautify or minify

JavaScript formatter

Beautify or minify

Markdown preview

Live preview, HTML out

Encode

6 tools

Base64

Text and files

URL encode

Percent-encoding

HTML entities

Escape and unescape

JWT decoder

Header, payload, expiry

Unicode escape

\u, code points, JSON

Text to hex and binary

Hex, binary, bytes

Generate

5 tools

UUID generator

v4, v7, ULID

Password generator

Strong and random

Hash generator

SHA-256, MD5, HMAC

Lorem ipsum

Placeholder text

Fake data

JSON, CSV or SQL

Convert

7 tools

Timestamp converter

Epoch ↔ date

Number base converter

Binary, hex, decimal

Color converter

HEX, RGB, HSL, OKLCH

Case converter

camelCase, snake_case

CSV ↔ JSON

CSV, JSON, Excel

JSON to TypeScript

Interfaces from samples

cURL converter

fetch, axios, Python

Text

4 tools

Diff checker

Compare two texts

Regex tester

Matches, groups, replace

Line tools

Sort, dedupe, count

Slug generator

Clean URL slugs

Reference

4 tools

Cron explainer

Plain English, next runs

Chmod calculator

755 ↔ rwxr-xr-x

URL parser

Parts and query

HTTP status codes

What each code means

34 tools in all