Free Developer Tools Online
Small, fast utilities for developers and students. Edit code with a live preview, clean up broken JSON, generate a strong password for a test account, or convert between binary and decimal while you study how computers store data.
The tools
Online Code Editor
Write and run HTML, CSS and JavaScript with a live preview and no setup.
JSON Formatter
Format, beautify and validate JSON and catch errors instantly.
Password Generator
Create strong random passwords in your browser. Nothing is stored or sent anywhere.
Binary Converter
Convert binary to text and text to binary, with decimal, hex and octal output and full UTF-8 support.
Decimal to Binary Converter
Convert decimal numbers to binary with a clear step by step explanation.
URL Encoder / Decoder
Encode text for safe URLs or decode percent-encoded strings instantly.
Hash Generator
Generate MD5 and SHA-256 hashes from any text, computed privately in your browser.
Diff Checker
Compare two texts line by line and see every difference highlighted.
JWT Decoder
Decode JSON Web Tokens in your browser: header, payload, signature and expiry.
Regex Tester
Test regular expressions live with match highlighting and capture groups.
CSV to JSON Converter
Convert CSV to clean JSON with delimiter options, right in your browser.
HTML Minifier
Shrink HTML files by removing comments and extra whitespace, safely.
HTML Beautifier
Format messy HTML into clean indented code that is easy to read.
CSS Minifier
Minify CSS online free, remove comments and extra spaces, and shrink stylesheet size without changing how your site looks.
CSS Beautifier
Beautify CSS online free and format messy or minified stylesheets into clean readable code with neat indentation.
JavaScript Minifier
Shrink JavaScript files to speed up page loads, free in your browser.
JavaScript Beautifier
Format messy JavaScript into clean, readable code with proper indentation.
XML Minifier
Minify XML files by removing comments and extra whitespace while keeping your data intact.
XML Beautifier
Format XML with clean indentation so nested tags, comments, and CDATA are easy to read and check.
SQL Minifier
Minify SQL queries by removing comments and extra whitespace while keeping your queries valid.
SQL Beautifier
Format SQL with clean indentation so nested queries and joins are easy to read.
SVG Minifier
Shrink SVG files by removing unused data while keeping every shape intact.
SVG Beautifier
Format SVG code with clean indentation so groups, paths, and viewBox settings are easy to check.
YAML Minifier
Compact YAML into flow style since indentation is significant and cannot be stripped like other code.
YAML Beautifier
Format YAML into clean block style with proper indentation for nested maps and lists.
TypeScript Minifier
Minify TypeScript safely with real type handling for interfaces, generics, and enums.
TypeScript Beautifier
Format TypeScript code with clean indentation for types, classes, and functions.
PHP Minifier
Minify PHP by removing comments and extra whitespace while keeping strings and heredoc blocks intact.
PHP Beautifier
Format PHP code with clean indentation for blocks, arrays, and alternative syntax.
Python Minifier
Shrink Python safely by removing comments and blank lines without touching indentation.
Python Formatter
Format Python with consistent 4 space indentation and clean spacing that keeps your code valid.
SCSS Minifier
Minify SCSS source while keeping variables, nesting, and mixins ready for your Sass build.
SCSS Beautifier
Format SCSS source with clean indentation for nesting, mixins, and media queries.
How to choose the right tool
The binary converters belong together: use the binary converter for whole words and text, and the decimal to binary converter when you are working with a single number and want to see the steps.
Frequently Asked Questions
Do these developer tools run in my browser?
Yes. The converters, formatter and password generator all run locally in your browser, so your code, JSON and passwords never leave your device.
Are the tools free for commercial work?
Yes. You can use every tool here for personal, school and commercial projects at no cost.
Why does the binary converter show decimal, hex and octal too?
The same byte can be written in many bases. Showing all of them together makes homework checks and debugging much faster.