Free online HTML formatter and beautifier. Format, beautify, and indent HTML code with configurable indentation (2 or 4 spaces, tabs). Detects unclosed tags, highlights syntax errors, and can minify HTML. Perfect for cleaning up messy markup before deployment. 100% browser-based with zero uploads.
100% browser-based — your data never leaves your device
Format, beautify, and indent HTML code with configurable options.
Copy your HTML source code and paste it into the input area.
Select tab or space indentation and set the indent size (2 or 4 spaces).
Click Format, then Copy to grab the beautified HTML for your project.
Drop a file here or click to browse
Ctrl+Enter to format
Count words, characters, sentences, and paragraphs in your text instantly.
Character CounterCount characters, words, sentences, and paragraphs in your text with real-time character analysis.
Slug GeneratorGenerate URL-friendly slugs from any text. Supports multiple separator styles.
Lorem Ipsum GeneratorGenerate placeholder text for your design and development projects.
URL Encode/DecodeEncode or decode URLs and query strings with proper percent-encoding.
URL Query ParserParse URL query parameters into a readable key-value table.
Diff CheckerFind differences between two texts with line-by-line highlighting.
Case ConverterConvert text between uppercase, lowercase, title case, sentence case, and more.
Base64 Encode/DecodeEncode or decode Base64 text instantly in your browser.
Regex TesterTest regular expressions with real-time matching, syntax highlighting, and cheat sheet.
Markdown PreviewWrite and preview markdown with live HTML rendering.
Markdown EditorWrite and preview markdown with live HTML rendering and syntax highlighting.
HTML Formatter is a free online text tool that format, beautify, and indent html code with configurable options. It works entirely in your browser — no downloads, no installations, and no server uploads required. content writers, developers, technical writers use HTML Formatter when they need a fast, privacy-respecting way to process text data without installing additional software. It supports capabilities such as smart indentation, tag cleanup, error detection. Additional features include one-click copy. Common use cases include beautifying minified html for debugging and code review, formatting generated html templates for consistent styling, cleaning up messy html output from wysiwyg editors. All processing happens locally using modern browser APIs, which means your data never leaves your device. This makes HTML Formatter ideal for working with sensitive data, proprietary code, or any situation where privacy matters.
HTML Formatter is a free online text tool that helps you format, beautify, and indent html code with configurable options. Key capabilities include smart indentation, tag cleanup, error detection. All processing is done locally in your browser — no data is uploaded, stored, or shared with any server. There are no sign-ups, no file size limits, and no hidden charges. It is commonly used to beautifying minified html for debugging and code review.
Copy your HTML source code and paste it into the input area.
Select tab or space indentation and set the indent size (2 or 4 spaces).
Click Format, then Copy to grab the beautified HTML for your project.
| Category | Details |
|---|---|
| Input Limits | Maximum input length: Browser memory bound |
| Encoding support: UTF-8, UTF-16, ASCII, ISO-8859-1, Windows-1252 | |
| Supported Formats | Plain text, UTF-8, ASCII, Unicode, Percent-encoding (RFC 3986) |
| Browser Engine |
|
All operations run entirely in your browser using built-in Text APIs. No server uploads, no data storage, and no third-party requests.
HTML Formatter is ideal when you need to beautifying minified html for debugging and code review without installing software or uploading data to a server. Since everything runs in your browser, there is no setup time and no risk of your data being stored on external servers. For for advanced text manipulation within an IDE, consider using VS Code. For for batch text processing on servers, sed/awk (command-line) may be a better fit. HTML Formatter fills the gap between heavyweight desktop tools and insecure online services that require uploading your data.
No. HTML Formatter processes everything entirely in your browser using JavaScript. Nothing you type, paste, or upload is ever transmitted to any server. Your data never leaves your device.
The formatter adds line breaks after block-level tags (div, p, h1-h6, ul, ol, li, table, section, etc.) and indents child content. Inline tags (span, a, strong, etc.) are preserved on the same line. You can choose tab or space indentation.
Block-level tags include: html, head, body, div, p, h1-h6, ul, ol, li, table, tr, td, section, header, footer, nav, main, article, aside, form, and more. Content in pre tags is preserved as-is.
Auto-indents nested HTML tags with configurable tab or space indentation.
Removes unnecessary whitespace between tags while preserving content.
Detects unclosed tags and common HTML structure issues.
Copy formatted HTML to clipboard instantly.
HTML Formatter is useful in a variety of scenarios across different workflows:
Beautifying minified HTML for debugging and code review
Formatting generated HTML templates for consistent styling
Cleaning up messy HTML output from WYSIWYG editors
Choose 2-space or 4-space indentation and stick with it across your project. Consistent indentation makes nested HTML structure much easier to read.
Always format HTML before making edits, then re-minify for production. This prevents errors that can occur when editing minified code.
Explore more tools in the Content Workspace workspace:
Prompt Formatter
Format and structure AI prompts with markdown preview and template variables.
AI Response Comparator
Compare AI model outputs side by side for quality evaluation.
JSON Explainer
Get a plain-English explanation of any JSON structure, including fields, types, and nesting.
JSON Schema to Prompt
Convert JSON schemas into structured AI prompts for structured output generation.
Keyword Density Analyzer
Analyze keyword frequency and density in any text for SEO optimization.
Word Counter
Count words, characters, sentences, and paragraphs in your text instantly.