Free HTML, CSS & JavaScript beautifier
Paste cramped HTML, CSS, or JavaScript and get readable indentation instantly. Powered by js-beautify in your browser — separate from the HTML minifier, which focuses on shrinking snippets for production.
How to use this tool
- 1
Open Code beautifier
Format HTML, CSS, or JavaScript for reading or review.
- 2
Choose language and indent
Pick HTML, CSS, or JavaScript and 2-space, 4-space, or tabs.
- 3
Copy formatted code
Copy the output into your project or docs.
Quick facts
| Runs locally? | Yes — js-beautify runs only in this tab. |
|---|---|
| Is anything uploaded? | No. Your snippets stay on your device. |
| HTML minifier vs this tool? | Use HTML minifier to minify; use code beautifier for HTML, CSS, and JS formatting. |
| TypeScript or JSX? | JavaScript mode handles many JSX snippets; strict TS may need a dedicated formatter. |
Top use cases
- Beautify HTML, CSS, and JavaScript in the browser — indent 2/4/tab, copy output, no upload.
- Runs locally?: Yes — js-beautify runs only in this tab.
- Is anything uploaded?: No. Your snippets stay on your device.
- HTML minifier vs this tool?: Use HTML minifier to minify; use code beautifier for HTML, CSS, and JS formatting.
- TypeScript or JSX?: JavaScript mode handles many JSX snippets; strict TS may need a dedicated formatter.
FAQ
Does it validate syntax?▾
It formats tolerant input; broken code may still look odd — fix errors in your editor first.
Can I minify here?▾
No — use the HTML minifier for HTML compression.
Embedded CSS in HTML?▾
HTML mode formats the whole document; copy embedded style rules into CSS mode for finer control.
Will formatting change behavior?▾
Only whitespace changes for valid code; always review before shipping.
Large files?▾
Very large inputs may slow the tab — split files if needed.
Offline?▾
After the page loads, formatting works without network.