Easy File Tools
Free online developer tools
Use focused browser utilities for common development and testing jobs. The collection includes formatters, live previews, generators, diagnostics, and input testing.
Choose a tool
Open the tool for the task you want to complete. Each page explains its inputs, processing behavior, and output.
Markdown previewer
Edit Markdown with a live preview panel.
HTML editor
Edit HTML with a live preview panel.
Code minifier
Minify and beautify CSS, HTML, and JavaScript.
Credit card generator
Generate valid test credit card numbers for development.
Keyboard tester
Test keyboard keys and detect stuck keys.
Barcode generator
Create printable Code 128, EAN-13, and UPC-style barcode images.
DNS lookup
Check DNS records across public resolvers with a dig-style answer view.
Questions about developer tools
Are the developer tools free?
Yes. The tools in this collection are free to use and do not require an account.
Do I need to install software to use these developer tools?
No. Easy File Tools runs in a modern web browser, so you can start from the relevant tool page.
How does Easy File Tools handle my files?
Most file operations run locally in your browser. Pages that need a network or server-assisted operation explain that behavior directly.