Free Online Developer Tools
Format, validate, convert, and optimize code instantly with 100+ free tools
Browse 83 free online developer tools for JSON, HTML, CSS, PDF, and more. Our free online code formatter and developer tools online collection helps you format code online, minify code online, and validate code online instantly. All free developer tools work 100% in your browser, fast, secure, and private. No registration required. Use our developer tools no download suite anytime.
- Total Tools
- 83
- Categories
- 18
- Privacy
- 100%
- Cost
- Free
Browse Tools by Category
Click any category to see all available tools
JSON Tools
13Format, validate, minify, and convert JSON data instantly.
HTML Tools
12Format, minify, validate, and generate HTML code.
CSS Tools
18Generate gradients, shadows, borders, and optimize CSS code.
Image Tools
Resize, compress, convert, crop, rotate, and edit images.
PDF Tools
Merge, split, compress, rotate, and convert PDF files.
AI Tools
7Chat, summarize, classify, and generate content with AI.
SEO Tools
4Create sitemaps, generate meta tags, and optimize for search engines.
Conversion Tools
14Convert currency, units, temperature, and time zones.
Text Tools
3Extract, format, and manipulate text data.
Utility Tools
5Generate QR codes, barcodes, passwords, and encode URLs.
Web Tools
12Analyze websites, take screenshots, test performance, and more.
Video Tools
3Create GIFs from videos, compress videos, and add subtitles.
Audio Tools
2Visualize audio waveforms and record audio directly in your browser.
Design Tools
5Generate color palettes, create favicons, vectorize images, and more.
Language Tools
4Practice language skills with listening drills, conjugation, and games.
Developer Tools
6Compare code, test regex, generate UUIDs, and create dummy data.
Game Tools
9Play interactive games, typing racer, social games, and puzzles.
Translation Tools
15Translate documents, images, and web pages while preserving formatting.
What are Developer Tools?
Developer tools are software utilities designed to help developers write, test, debug, and optimize code more efficiently. Our free online developer tools collection includes code formatters, code minifiers, code validators, and code converters that work entirely in your browser. These online developer tools eliminate the need for complex software installations, making it easy to format code online, minify code online, and validate code online instantly.
Whether you're working with JSON, HTML, CSS, or other web technologies, our free code formatter and developer tools online suite provides everything you need. From json formatter online tools to html minifier online utilities, our free online code tools help you streamline your development workflow without leaving your browser. All our developer tools no download solutions process data locally, ensuring your code never leaves your device.
✓Code Formatting Tools
Our code formatter online tools beautify and structure your code with proper indentation. Use our json formatter online, html formatter online, or css formatter online to make code readable and maintainable.
✓Code Minification Tools
Our code minifier online tools reduce file sizes by removing whitespace and comments. Use our json minifier online, html minifier online, or css minifier online to optimize code for production.
How to Use FixTools
Using our free online developer tools is simple and straightforward. Our developer tools online collection requires no installation, registration, or setup. Here's how to get started with our free code formatter and other online developer tools:
Choose Your Tool
Browse our categories above or use the search function to find the right developer tool. Whether you need a json formatter online, html minifier online, or css generator online, we have you covered.
Paste or Enter Your Code
Simply paste your code into the input field. Our free online code formatter and code minifier online tools accept code from any source. No file uploads required—everything works directly in your browser.
Get Instant Results
Our developer tools instant processing means you get results immediately. Copy the formatted, minified, or converted code and use it in your project. All processing happens locally in your browser for maximum privacy.
Our free developer tools work on any device with a modern browser. Whether you're using a desktop, tablet, or mobile device, our online code tools are always accessible. No need to install software or create accounts—just visit the tool page and start using it immediately.
Best Practices for Using Developer Tools
To get the most out of our free online developer tools, follow these best practices when using our code formatter online, code minifier online, and other developer tools online:
- •Format before minifying: Use our code formatter online tools first to ensure your code is properly structured, then use code minifier online tools for production builds.
- •Validate your code: Always use our code validator online tools to check for syntax errors before deploying. Our json validator online and html validator online catch issues early.
- •Keep backups: While our free online code tools are reliable, always keep backups of your original code before using code minifier online or code converter online tools.
- •Test after conversion: After using our code converter online tools, test your code thoroughly to ensure functionality is preserved.
- •Use appropriate tools: Choose the right developer tool for your task. Our json formatter online is different from our json minifier online—use each for its intended purpose.
Our free developer tools are designed to make your development workflow more efficient. By following these best practices, you can maximize the benefits of our online code tools while maintaining code quality and security.
Why Choose FixTools?
100% Client-Side
All processing happens in your browser. No data leaves your device, ensuring complete privacy and security.
Fast & Free
Instant results with no registration required. Use any tool as often as you want, completely free.
Developer-Focused
Built by developers, for developers. Tools designed to solve real problems you face every day.
Frequently Asked Questions
What tools are available on FixTools?
FixTools offers 83 free online tools across 8 categories: JSON Tools for data formatting and conversion, HTML Tools for markup generation and optimization, CSS Tools for style generation and minification, PDF Tools for document manipulation, AI Tools for content generation, SEO Tools for search optimization, Conversion Tools for unit and currency conversion, and Text Tools for text processing.
Are all FixTools free to use?
Yes, all 83 tools on FixTools are 100% free to use. There's no registration required, no account needed, and no hidden fees. All processing happens in your browser, so your data never leaves your device.
Do FixTools work offline?
Yes, once the page loads, all our tools work entirely in your browser using JavaScript. No internet connection is needed after the initial page load. This ensures fast processing and complete privacy.
How do I find the right tool?
Browse tools by category using the links above, or use the search function on our homepage. Each category page lists all available tools with descriptions. You can also use keyboard shortcuts (Cmd/Ctrl + K) to quickly search for tools.
Is my data secure when using FixTools?
Absolutely. All tools process data entirely in your browser using client-side JavaScript. Your data never leaves your device, isn't sent to any server, and isn't stored anywhere. This ensures complete privacy and security.
What file sizes can FixTools handle?
Most tools can handle files up to several megabytes in size. However, for optimal performance, we recommend files under 5-10MB depending on the tool. For very large files, consider processing them in chunks or using desktop software.
Can I use FixTools on mobile devices?
Yes! All FixTools are fully responsive and work on mobile devices, tablets, and desktops. The interface adapts to your screen size for optimal usability.
Do FixTools require any software installation?
No, FixTools are web-based and require no software installation. Simply visit the tool page in your browser and start using it immediately. All tools work with modern browsers like Chrome, Firefox, Safari, and Edge. Our developer tools no download approach means you can use any tool instantly without installing anything.
How do I format code online using FixTools?
To format code online, simply select the appropriate code formatter from our free online developer tools collection. For JSON, use our json formatter online tool. For HTML, use our html formatter online tool. For CSS, use our css formatter online tool. Paste your code, click format, and get beautifully formatted code instantly. All our code formatter online tools work entirely in your browser.
Can I minify code online for free?
Yes! Our free online code minifier tools allow you to minify code online instantly. Use our json minifier online, html minifier online, or css minifier online tools to reduce file sizes by removing whitespace and comments. All our code minifier online tools are completely free and work 100% in your browser with no registration required.
What are the best free developer tools online?
FixTools offers the best free developer tools online, including code formatters, code minifiers, code validators, and code converters. Our free online developer tools collection includes json formatter online, html minifier online, css generator online, and many more. All tools are free, work instantly in your browser, and require no download or registration.
How do I validate code online?
Our free online code validator tools help you check code for syntax errors and compliance issues. Use our json validator online to validate JSON syntax, html validator online to check HTML validity, or css validator online to verify CSS correctness. All our code validator online tools provide instant feedback and work entirely in your browser.
Are FixTools developer tools instant?
Yes! All our developer tools instant processing means you get results immediately. Whether you're using our code formatter online, code minifier online, or code converter online tools, processing happens instantly in your browser. No waiting, no delays—just instant results for all your development needs.