DevToys

Your swiss army knife for development. Encode, decode, generate, format, convert — all in one place.

Lightning Fast— All tools run client-side for instant results

100% Private— Your data never leaves your browser

Works Offline— No server needed, works anywhere

Press ⌘K or / to search tools

Encoders / Decoders

4 tools

HTML Encode / Decode

Encode or decode HTML entities

URL Encode / Decode

Encode or decode URL components

Base64 Encode / Decode

Encode or decode Base64 strings

Number Base Converter

Convert between binary, octal, decimal, and hex

Generators

5 tools

Generate and convert UUIDs (v1, v4, v7)

Password Generator

Generate strong, secure passwords

Lorem Ipsum Generator

Generate placeholder text

Generate MD5, SHA-1, SHA-256 hashes

Hex to GUID Converter

Convert hexadecimal strings to GUID format and back

JSON Tools

3 tools

JSON Formatter / Validator

Format, validate and beautify JSON

Minify and compress JSON data

Convert JSON arrays to CSV format

XML Tools

2 tools

Format and beautify XML documents

Convert XML to JSON format

Text Tools

6 tools

Convert text between cases (camel, snake, kebab, etc.)

Word & Character Counter

Count words, characters, sentences and paragraphs

Test and debug regular expressions

Markdown Preview

Preview and convert Markdown to HTML

Compare two texts and highlight differences

String Escape / Unescape

Escape or unescape strings for JSON, HTML, URLs, etc.

Web Tools

6 tools

Decode and inspect JWT tokens

Color Converter

Convert between HEX, RGB, HSL color formats

Visual color picker with wheel, sliders, and eyedropper

Timestamp Converter

Convert between Unix timestamps and dates

CSS Unit Converter

Convert between px, rem, em, vh, vw

Timezone Converter

Convert times between different timezones

Code Tools

1 tools

JavaScript Minifier

Minify JavaScript code by removing whitespace and comments