HTML Code Formatter
Format HTML code in your preferred style
Features
Versatile indent settings
Choose your formatting style from 2 to 4 spaces or tabs
Supports minify compression too
Minimize code by removing extra whitespace and line breaks
Unify tag name case
Convert tag and attribute names to lowercase or uppercase in bulk
Supports bulk comment removal
Strip out comments in the HTML all at once to make it lighter
How to use
Enter the HTML code
Paste it directly into the text tab or load it from the file tab
Specify formatting options
Choose the indent width, tag name case, and comment removal
Press the format button to run
Check the formatted code and use it by copying or saving to a file

Use cases
Making messy source readable
Tidy HTML with broken indentation into a readable form
Compressing code before release
Use minify to reduce transfer volume and help improve display speed
Aligning to coding conventions
Match tag name case and indentation to your team's standards
Understanding the structure of received code
Format received HTML to quickly grasp its structure
Basic Knowledge
What is Minification (Compression)?
Minification is the process of reducing HTML file size by removing line breaks, indentation, and comments that do not affect functionality. This decreases file transfer size and speeds up page loading.
Why Display Doesn't Change Even After Formatting
In HTML, consecutive whitespace and line breaks are treated as a single space by default. Therefore, even if you adjust indentation or add line breaks, the appearance in a browser remains almost unchanged. This property allows you to freely format code in a human-readable manner.
Safety and Privacy
Runs entirely in your browser
Your input data is processed only within your browser and is never sent externally.
Processing only in your browser
formatting HTML code is processed entirely within your browser, and input data is not sent to any server.
Communications encrypted with HTTPS
Page loading is also encrypted by TLS, and content cannot be read by third parties.
No transmission to third parties
Input content is not sent to external services such as ad networks or trackers.
No automatic saving of results
the formatted code and input suggestions are not stored on the server.
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Updates
- update #281
HTML Code Formatter: fixed bug where extra whitespace was added at the end of links
Featured Tools
RAKKOTOOLS is free to use!
Available free of charge for individuals and corporations, commercial and non-commercial use alike.No prior permission or usage application is required. Feel free to use it in various situations.

Use in streaming and videos
Use various tools such as lottery draws and raffles in live streams and videos.

Use in schools, work, and events
Can be used in various situations such as classes, team division, internal work, and events.

Introduction on Web, books, and SNS
Feel free to introduce it as a useful tool on web media, books, SNS, and other platforms.

Commercial use
Can be used for commercial purposes such as research, calculation, processing, and conversion in business and production.
If you mention it, I get motivated to create more tools!


If using in streaming and videos
Link to RAKKOTOOLS in the description, or Mention or display that you are using RAKKOTOOLS in the stream or video.
Credit example for the description
Usage guidelinesYou are free to use it for normal purposes. However, use for purposes that violate laws, infringe on third-party rights, impose significant load on the service, or otherwise interfere with service operation is prohibited.
We do not guarantee the accuracy or completeness of information and calculation results obtained from each tool.
This notice is a translation of the original Japanese text. If there is any discrepancy between the translation and the original, the Japanese original takes precedence.
