Unminify HTML Online — Free HTML Formatter

Unminify minified HTML instantly with our free online tool. Restore readable formatting for debugging. All processing in your browser.

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HTML Unminification
Unminify compressed HTML online. Restore readable markup for debugging.

Features

Restore readable formatting to minified HTML with proper indentation and line breaks. Essential for debugging and reviewing production HTML.

Unminify HTML

Restore readable formatting to minified HTML with proper indentation and line breaks. Essential for debugging and reviewing production HTML.

Basic example

Minified HTML

<!DOCTYPE html><html><head><title>Checkout Dashboard</title><meta charset="utf-8" /></head><body><header class="site-header"><h1>FastMinify Store</h1></header><main><section class="cart"><h2>Your cart</h2><p>3 items ready for checkout.</p></section></main></body></html>

Formatted HTML

<!DOCTYPE html> <html> <head> <title>Checkout Dashboard</title> <meta charset="utf-8" /> </head> <body> <header class="site-header"> <h1>FastMinify Store</h1> </header> <main> <section class="cart"> <h2>Your cart</h2> <p>3 items ready for checkout.</p> </section> </main> </body> </html>

Minification options

Beautify Options
Indentation options for Beautify and Unminify (not used by Minify)

Indentation size

Number of spaces (or tab width) used when formatting HTML.

Indent type

Use spaces or tabs for indentation when beautifying HTML.

How to Unminify HTML Online

HTML unminification restores readable formatting to compressed HTML documents. Paste any minified HTML into our tool and click Unminify to add proper indentation, organize nested elements, and format attributes. This is essential for debugging production websites, inspecting minified templates, or reviewing HTML generated by CMS platforms.

HTML Minification — What Gets Removed

HTML minification removes unnecessary whitespace between tags, HTML comments, optional closing tags, redundant attributes, and empty attribute values. It preserves all content, inline styles, scripts, and structural elements. Your page will render identically in all browsers after minification. Minification does not escape untrusted text for safe HTML output—when you need to preview or debug entity escaping on a snippet, use our HTML entities tool.

Frequently Asked Questions — Unminify

Everything about unminification

What is HTML unminification?

It adds indentation and line breaks to compressed HTML so you can inspect and edit markup.

Beautify instead of unminify?

For readable HTML, use the HTML beautifier.

Unminify

Expand minified or compressed code — unminify JavaScript, CSS, TypeScript, SCSS, LESS, SQL, YAML and other formats when debugging or reviewing.

Explore other tool categories

Minify

Shrink code and assets for production — minify JavaScript, CSS, HTML, JSON and XML before gzip or CDN deploy.

Beautify

Make code readable with consistent indentation — beautify JavaScript, CSS, TypeScript, SCSS, LESS, Markdown, GraphQL, SQL, YAML and more in your browser.

Conversion

Transform data between JSON, YAML, XML and CSV locally — no server uploads.

CSS preprocessors

Compile SCSS or LESS to standard CSS in the browser — pair with beautify or minify for a full stylesheet workflow.

JSON Tools

Validate, format, diff and explore JSON payloads — complementary to minifiers and converters.

SVG Tools

Preview, optimize with SVGO, export Data URI, resize, beautify, convert to JSX and validate SVG — all in your browser.

DevOps & Infra

Terraform HCL format/validate/minify, Dockerfile format & lint, Docker Compose and .env validation.

CI/CD

GitHub Actions and GitLab CI — format YAML and check workflow/job structure in your browser.

Logs & observability

Line-oriented JSON/NDJSON and Nginx/Apache access logs — format, filter, validate, and CSV/TSV.

Kubernetes

Multi-doc manifests, structural validate, Ingress/Deployment starters, and Helm values formatting.

Networking / IP

CIDR, subnets, and IPv4/IPv6 helpers — in your browser.

Security & tokens

JWKS, X.509 certificates, and secrets scan — browser-local.

API & schemas

OpenAPI tools to format, validate, and lint your specs.

Encoding

Encode or decode Base64, URL components and HTML entities — client-side only.

Developer utilities

Timestamps, UUID, ULID, Nanoid, cron, passwords, regex, slugify, number bases, case, text diff, and chmod — all client-side.

Text & Markdown

Count words, build Markdown TOCs, and clean line lists — all in your browser.

AI & LLM

Token counting, pricing estimates, and context-window fit — 100% browser-local.

Serialization

Serialize and deserialize PHP data structures beside JSON workflows.