Free CSS Formatter that works offline
Turn minified or compressed CSS into a readable layout for review, debugging and documentation.
What this css formatter does
Formatting inserts line breaks around structural punctuation while protecting strings and comments. It improves readability but does not verify selectors or browser support.
How to use the CSS Formatter
- Enter or paste a CSS stylesheet or fragment into the tool.
- Adjust the available options so they match the format and result you need.
- Choose Format CSS and review a consistently indented stylesheet before using it.
- Copy or download the result, then clear the page if the input was sensitive.
Common uses
- Reviewing minified CSS
- Preparing stylesheet snippets for documentation
- Comparing rule changes
- Cleaning small embedded style blocks
Private processing and offline access
This tool does not submit your input to a conversion server. Processing takes place inside the browser using local JavaScript and standard Web APIs. After the PWA has been installed or cached, the page and its core features remain available without an internet connection. Closing or clearing the page removes unsaved input; the tool does not create an account or cloud history.
Tips for accurate results
- Test the result in the target browser.
- Keep original production source under version control.
- Use the CSS minifier for the reverse operation.
Frequently asked questions
Does this tool upload my data?
No. CSS Formatter processes its input in the current browser and does not submit it to a conversion API.
What input does the CSS Formatter accept?
Standard CSS blocks, comments and strings are supported. Deep parser validation and all emerging syntax are outside this lightweight formatter.
Can I use this tool offline?
Yes. Once the Offline Tools PWA has cached the page, the core feature works without an internet connection.