Code Tools

Developer tools for code formatting, minification, and conversion. Format SQL, test regex, minify CSS/JS, and more.

16 free tools available

Free CSS Minifier Online

Minify CSS code to reduce file size and improve loading speed. Free, fast, and works entirely in your browser with no sign-up required.

Free JavaScript Minifier

Minify JavaScript code to reduce file size and improve performance. Free, fast, and works entirely in your browser with no sign-up required.

Free HTML Minifier Online

Minify HTML code to reduce page size and loading time. Free, fast, and works entirely in your browser with no sign-up required.

Free SQL Formatter & Beautifier

Format and beautify SQL queries for better readability. Free, fast, and works entirely in your browser with no sign-up required.

Popular

Free Regex Tester & Debugger

Test and debug regular expressions in real-time with explanations. Free, fast, and works entirely in your browser with no sign-up required.

Free Markdown Preview Editor

Write and preview Markdown in real-time with HTML export. Free, fast, and works entirely in your browser with no sign-up required.

Free Diff Checker Online

Compare two texts and highlight differences line by line. Free, fast, and works entirely in your browser with no sign-up required.

Free HTML Entity Encoder

Encode special characters to HTML entities and vice versa. Free, fast, and works entirely in your browser with no sign-up required.

Free JSON to TypeScript Tool

Convert JSON objects to TypeScript interfaces automatically. Free, fast, and works entirely in your browser with no sign-up required.

Free HTML to JSX Converter

Convert HTML markup to valid JSX syntax for use in React components and projects. Free, fast, and works entirely in your browser with no sign-up required.

Free Code Screenshot Maker

Create beautiful code screenshots for social media and documentation. Free, fast, and works entirely in your browser with no sign-up required.

Free HTML Beautifier Online

Format and beautify HTML code with proper indentation. Free, fast, and works entirely in your browser with no sign-up required.

Free CSS Beautifier Online

Format and beautify CSS code with sorted properties. Free, fast, and works entirely in your browser with no sign-up required.

Free JSON Path Finder

Explore nested JSON structures and find the exact path to any value in the tree. Free, fast, and works entirely in your browser with no sign-up required.

Free XML Formatter & Validator

Format, beautify, and minify XML documents with syntax validation and error detection. Free, fast, and works entirely in your browser with no sign-up required.

Free YAML Formatter & Validator

Format, beautify, and validate YAML documents with real-time syntax error checking. Free, fast, and works entirely in your browser with no sign-up required.

Guides & tutorials

Step-by-step guides to get the most out of these tools.

The Developer's Toolkit: Essential Free Online Tools for 2026 How to Test a Regular Expression (Regex)How to Minify CSS, JavaScript, and HTML

About Code Tools

Our Code Tools cover the formatting and conversion chores developers hit every day. Beautify or minify HTML, CSS, JS, JSON, and SQL; test and debug regular expressions; escape and unescape strings; diff snippets; and convert between common data formats — all in a fast, private browser workspace.

They're handy for front-end and back-end developers, students learning to code, and anyone tidying up data. Pair them with our Developer Tools for API testing and generators, or our Text Tools when you're manipulating raw content.

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