Add the source content
Paste code or technical input, upload a supported plain text file, or load the working example. Check headers, delimiters, syntax, or line structure before processing.
Developer tools
HTML Formatter
Result
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Press Ctrl or Command and Enter to run the tool.
About this tool
About this tool
HTML Formatter indents and pretty-prints markup by parsing tags, attributes, and nesting levels locally in your browser. It corrects indentation and line breaks while preserving content and comments for editing.
Format HTML markup with readable nesting and consistent indentation. Use the full-width workspace to format content while reviewing syntax, encodings, protocol fields, and implementation details. The tool accepts plain text, provides focused options, and creates HTML output that you can inspect, copy, download, or save as a local draft.
Built for daily work
How to use this tool
How to use this tool
Configure the operation
Review the available processing controls. The selected controls determine how the HTML Formatter interprets the source and builds the result.
Run the tool
Start the HTML Formatter and review the result, visual preview, and technical report. Correct any reported issue and run the tool again when necessary.
Export or continue the workflow
Copy or download the HTML result, save a browser-local draft, or open a related tool for the next conversion, validation, or cleanup step.
Key features
Key features
Indented element hierarchy
Tags are indented to reflect nesting depth. Attributes are preserved and the document structure becomes readable at a glance.
Preserves scripts, styles, and preformatted blocks
Content inside script, style, and pre tags is left intact so embedded code is not corrupted by reformatting.
Copy and download the tidy markup
Copy to clipboard or download the formatted HTML for pasting into an editor or CMS.
Text restructuring only, no rendering
The formatter works on the raw markup string. It does not load external resources, execute JavaScript, or render the page.
Practical use cases
Practical use cases
Private by default
For local tools, input is processed in your browser and is not sent to application analytics.
Data processing noticeTechnical details
Technical details
Input formatsplain text
Output formatsHTML
ProcessingLocal browser processing
Task controlsthe available processing controls
Maximum local file25 MB per supported file
Workspace featuresFocus mode, examples, copy, download, local drafts, and result reports
Limitations and important notes
Limitations and important notes
- Formatting improves readability but does not guarantee semantic correctness.
- Large or deeply structured input depends on available browser memory and may process more slowly on mobile devices.
- The tool implements practical browser-based processing and may not reproduce every feature of specialist desktop software or every vendor-specific extension.
- Keep the original source and review generated output before production, security-sensitive, financial, legal, or safety-critical use.
Frequently asked questions
Frequently asked questions
It pretty-prints markup by parsing tags, attributes, and nesting levels in your browser, adding consistent indentation and line breaks.
It improves readability and indentation but does not guarantee correction of severely malformed markup. Review the output for missing tags.
You can process up to 25 MB locally, though deeply nested markup may need more memory and time in your browser.
No. Formatting runs locally in your browser and input is not sent to analytics or stored on the server.
Related guides and solutions
Related guides and solutions
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