HTML Formatter & Beautifier: Format, Indent, Minify Online
Paste tangled HTML and get clean, consistently indented markup instantly, or flip to minify for the smallest shippable output. Full documents or loose fragments, tuned indent and print width, all client-side and never uploaded.
What is the html formatter?
The HTML Formatter beautifies or minifies markup, reindenting tangled HTML, wrapping long lines and fixing nesting readability, or collapsing to production-ready output. It handles full documents and loose fragments, with tunable indent and print width. Free and client-side, so your markup is processed in the browser and never uploaded.
The GigAI HTML Formatter is a desktop-grade markup beautifier that formats HTML entirely in your browser using the Prettier engine. Paste, drop or type any markup, a whole page with a doctype, a chunk of a template, an Angular/Vue/Handlebars snippet, or the mangled single-line HTML your CMS or email builder spat out, and it reflows the tags with clean, consistent indentation as you type. Set the indent to 2 spaces, 4 spaces or tabs, and pull the print width from a tight 60 up to a roomy 120 columns to control exactly where long attribute lists and text wrap. When you're ready to ship, one click switches to Minify mode, stripping insignificant whitespace and line breaks so your HTML weighs as little as possible in the response, and a byte-size badge shows precisely what you saved. Unlike a paste-and-pray online box, we surface the precise line and column when the markup is too broken to parse and let you jump straight to it, keep a full undo/redo history, format from the keyboard with real shortcuts, and let you copy, download an.html file, or share a link that reopens your input. Everything happens locally, your unreleased landing page, internal dashboard markup or customer email template is never uploaded, logged or seen by anyone.
- Difficulty:
- Easy
- Typical time:
- ~15s
- Processing:
- 100% browser processing
Last updated
How to use the html formatter
- 1
Paste, drop or import HTML
Paste into the left editor, drag an .html file onto it, or click to browse. Or load the built-in sample to try it instantly.
- 2
Choose Beautify or Minify
Pick Beautify to reindent for readability, or Minify to collapse to the smallest valid output. Everything re-runs live as you switch.
- 3
Tune indent and print width
Set 2-space, 4-space or tab indentation and drag the print width to control where long lines wrap. The output updates as you type.
- 4
Copy, download or share
Copy the formatted markup, download it as an .html file, or share a link that reopens the tool with your input pre-loaded.
What HTML Formatter includes
Clean, consistent indentation
Prettier reflows nested tags with 2-space, 4-space or tab indentation, aligning attributes and closing tags so a wall of markup becomes instantly scannable.
Tunable print width
Slide the wrap column from 60 to 120 to decide when long attribute lists and text content break onto new lines, tight for narrow diffs, wide for fewer wraps.
One-click minify
Flip to Minify mode to strip insignificant whitespace and line breaks into the most compact valid HTML, with a byte-size badge showing exactly what you shaved off.
Documents and fragments
Format a complete page with its doctype and head, or a loose snippet ripped out of a component or email, the parser handles partial markup without choking.
Pinpoint parse errors
When markup is too malformed to format, we show the exact line and column, explain what the parser expected, and let you jump straight to the offending character.
100% in your browser
Formatting runs locally on your device. No page, template or email HTML is ever uploaded, stored or logged. Close the tab and every trace is gone.
Why use our html formatter
Turn minified HTML back into readable code
Paste the single-line markup from a view-source or a build output and get properly indented HTML you can actually read, debug and edit.
Consistent formatting for clean diffs
Running every template through the same indent and print-width settings keeps Git diffs focused on real changes instead of whitespace noise.
Ship lighter markup
Minify mode trims insignificant whitespace so pages, email HTML and cached fragments transfer smaller, with the exact saving shown before you copy.
Private by design
Because it runs entirely in your browser, you can safely format unreleased pages, internal dashboards or customer emails, none of it leaves your machine.
Built for the way you work
From quick one-off fixes to daily workflows, see how people put this tool to use.
- Frontend developer
Unminify a production page
Grab the single-line HTML from view-source or a bundle, reindent it, and finally read the DOM structure you're trying to debug or replicate.
- Email developer
Tidy table-based email HTML
Beautify the deeply nested, inline-styled markup email builders produce so you can find the row or cell that's breaking a client, then minify before sending.
- CMS / marketing editor
Clean up pasted rich-text markup
Format the messy HTML a WYSIWYG or Word paste leaves behind into readable, consistent tags before dropping it into a page or newsletter.
- Backend / template developer
Format a server-rendered fragment
Reindent a partial pulled from a Django, Rails or Handlebars template so the structure is obvious during review, without needing the full page context.
Supported formats
Accepts HTML, HTM and TXT, and produces HTML, all processed locally in your browser.
- HTML
- HTM
- TXT
- HTML
Frequently asked questions
Recommended tools
JSON Formatter
Format, validate and minify JSON in your browser with pinpoint error line + column, jump-to-error, key sorting and live editing: nothing is uploaded.
Base64 Encoder
Encode text or any file to Base64 instantly: Unicode-safe, with a URL-safe toggle and one-click data URLs. Runs entirely in your browser, nothing uploaded.
JWT Decoder
Decode and inspect any JSON Web Token instantly. Read the header, payload and signature, see when it was issued and expires, and optionally verify an HS256 signature. 100% in-browser. Your token never leaves your device.
UUID Generator
Generate secure UUIDs instantly, random v4, time-ordered v7, or the nil UUID. Bulk-generate up to 1,000, copy or export as TXT/CSV, all in your browser.
HTML Minifier
Minify HTML in your browser, collapse whitespace, strip comments and shrink page weight while safely preserving pre, textarea, script and style content. Nothing is uploaded.
Markdown Preview
Write GitHub-Flavoured Markdown and see a live, sanitised HTML preview side-by-side, with a formatting toolbar, tables, task lists, and copy-as-HTML. Nothing is uploaded.
Comparisons & guides
Go deeper on the concepts behind the html formatter.
Common problems, solved
Hit a snag? Here are quick fixes for the issues people run into most.
My template tags ({{ }}, {% %}, <?php ?>) got reformatted oddly.
The formatter parses HTML, not the templating layer wrapped around it. Simple interpolations usually survive, but complex control blocks can confuse the parser. Format the rendered HTML output, or keep template-specific formatting to your editor's language plugin.
It reports a parse error but the HTML looks fine.
Click into the reported line and column: the usual causes are an unclosed tag, a stray '<' that isn't escaped as <, or mismatched quotes in an attribute. Fragments with an unbalanced opening or closing tag can also trip it.
Whitespace inside <pre> or <textarea> changed.
It shouldn't, the formatter preserves whitespace-sensitive elements like <pre>, <textarea> and <script>. If content still shifts, wrap the sensitive block in one of those elements so its exact whitespace is respected.
Minify didn't make it as small as I expected.
This mode strips insignificant HTML whitespace safely. It does not remove comments, mangle inline CSS/JS, or drop optional tags, because that risks changing rendering. For aggressive build-time minification, pair this with a dedicated CSS/JS minifier in your pipeline.
Get the most out of it
Pull the print width down to 60–80 for tighter, more reviewable diffs, or up to 120 to keep long attribute lists on one line.
Press Ctrl/Cmd+Enter to re-run instantly and Ctrl/Cmd+S to download the formatted .html output.
Beautify first to understand a chunk of markup, then switch to Minify and check the byte-size badge before shipping.
Match your project's editor settings (tabs vs 2 vs 4 spaces) here so pasted snippets drop in without reformatting churn.
Wrap whitespace-critical content in <pre> so the formatter leaves its exact spacing untouched.
What's new
Recent updates and improvements to the html formatter.
Initial release, live HTML beautify with 2/4/tab indentation and adjustable print width, one-click minify with byte-size stats, precise line + column parse errors, drag-drop import, undo/redo and shareable links.
Added keyboard shortcuts (run, download, clear, undo/redo) with an in-tool shortcuts helper and a curated HTML sample.
Improved handling of whitespace-sensitive elements and clearer error messages for unclosed tags in fragments.
Keep exploring
Problems we solve
Definitions
From the blog
Explore categories
Compare formats
By file type
Common tasks
Your privacy is built in
Your HTML is parsed and formatted entirely in your browser using the Prettier engine. It is never uploaded to any server. Nothing is stored, logged or transmitted, so you can safely format unreleased pages, internal dashboard markup, or customer email templates. Close the tab and every trace is gone.
- Runs in your browser
- No uploads
- Nothing stored
Ready to try the html formatter?
Free, private and instant. HTML Formatter runs right in your browser.