Messy, minified, or one-line HTML can be nearly impossible to read or debug. Flipper File's HTML Formatter instantly re-indents and beautifies your HTML — making it clean, readable, and properly structured. Just paste your code and hit Format. No install, no account, no limits.
How to Format HTML Online
- Paste your raw or minified HTML into the input box on the left.
- Choose your indentation style — 2 spaces, 4 spaces, or tabs.
- Click the Format HTML button.
- Review your beautifully indented HTML in the output panel.
- Click Copy to copy to clipboard, or Download to save as an
.htmlfile.
Why Use Flipper File to Beautify HTML?
- Instant results — HTML formats in milliseconds, right in your browser.
- No login or account required — open the tool and start formatting immediately.
- Your code stays private — all processing happens client-side; nothing is sent to a server.
- Flexible indentation — choose 2-space, 4-space, or tab indentation to match your code style.
- Handles minified HTML — paste a single-line blob and get back fully-structured, readable code.
- Free with no limits — format files of any size, as many times as you need.
Frequently Asked Questions
What is an HTML formatter?
An HTML formatter (also called a beautifier or pretty-printer) takes compressed, minified, or poorly indented HTML and reformats it with proper indentation and line breaks so it's easier to read and edit.
Does this tool work on minified HTML?
Yes. You can paste a single-line minified HTML string and the formatter will expand it into properly structured, indented code.
Will it fix broken or invalid HTML?
The formatter will do its best to reformat what you paste, but it doesn't automatically fix underlying HTML errors like missing closing tags. For a full validation check, use an HTML validator tool.
Is my HTML code sent to a server?
No. All formatting happens entirely in your browser using JavaScript. Your code never leaves your device.
What indentation styles are supported?
You can choose between 2 spaces, 4 spaces, or hard tabs. The default is 2 spaces, which is the most common convention.
Can I format an entire HTML file?
Yes — paste the full contents of an HTML file, including the doctype, <html>, <head>, and <body> tags. The formatter handles complete documents as well as HTML fragments.
Does it work with HTML that includes inline CSS and JavaScript?
Yes. The formatter will preserve inline <style> and <script> blocks and apply basic indentation to them as well.
Is there a file size limit?
No. The tool runs in your browser and handles files of any size without any restrictions.