Zero Eval

Online HTML Formatter (Beautifier & Minifier)

Beautify messy, unformatted HTML markup or minify production code in seconds. Whether you are cleaning up scraped web content, tidying template files, or optimizing payload sizes for faster page load times, achieve pristine code formatting instantly.

Features customizable indentation (2 spaces, 4 spaces, or tabs), clean tag structure alignment, white-space compaction, syntax statistics, and instant file download (.html). Completely secure with zero script execution.

Indentation:

Input HTML Code0 chars · 0 B

Formatted / Minified HTML

0 chars · 0 B

100% client-side parser. Zero execution, zero eval(), completely secure.

AdSense Slot (top-banner)Pre-allocated container to prevent CLS

How It Works (Step-by-Step)

1. Paste or Load HTML

Paste your unformatted, minified, or messy HTML code into the input editor, or click load sample code.

2. Select Action & Indentation

Choose "Beautify" (with 2 spaces, 4 spaces, or tabs) for readable structured code, or "Minify" to strip redundant spaces and comments.

3. Copy or Download

Review character and byte count reductions, then click "Copy HTML" or "Download .html".

Key Features & Advantages

Beautify & Minify in One Tool

Switch effortlessly between clean hierarchical indentation and aggressive whitespace minification.

Safe Tokenizer (Zero eval)

Processes markup via a secure, sandboxed parsing algorithm without executing embedded scripts or styles.

Custom Indentation Settings

Configure 2 spaces, 4 spaces, or standard tabs to match your team's linting and formatting conventions.

Compression & Size Metrics

Inspect before/after byte counts, character statistics, and compression savings percentages in real time.

AdSense Slot (in-content)Pre-allocated container to prevent CLS

Frequently Asked Questions

What is the difference between beautifying and minifying HTML?

Beautifying adds structured indentation and line breaks to make code human-readable and easy to debug. Minification strips unnecessary spaces, newlines, and comments to reduce file size and bandwidth consumption.

Is it safe to paste proprietary or sensitive HTML templates?

Yes. All parsing and formatting occur purely in JavaScript memory inside your browser. No HTML code is sent to any server or recorded anywhere.

Does this tool execute any JavaScript inside the HTML?

No. The formatter uses a safe lexical parser without eval(), Function() constructors, or iframe rendering. Embedded <script> and <style> tags are treated strictly as text data.

Related Online Tools

Online CSS Formatter (Beautifier & Minifier)

Format, beautify, and minify stylesheet CSS code online. Clean indentation, rule sorting, remove redundant comments, and compress CSS files instantly in your browser.

JavaScript Minifier & Beautifier (Online JS Compressor)

Minify and beautify JavaScript code online. Compress JS files by removing comments and whitespace, or format unreadable code with clean indentation. 100% private, zero execution.

Online JSON Formatter & Validator

Format, validate, prettify, and minify JSON data online. Free developer tool with syntax error highlighting, tree structure view, and 100% client-side privacy.

Online Base64 Encoder & Decoder

Encode and decode Base64 strings with full UTF-8 Unicode support. Free developer tool with instant swap, copy, and client-side processing.