HTML Diff Tool

Compare HTML code for web pages online using our HTML diff checker and highlight differences line by line. Easily review changes in tags, attributes, classes, or IDs and merge HTML updates between versions.

Language:

Original HTML

Changed HTML

About the HTML Diff Checker

Manual code reviews can be tedious and prone to human error. A single missing character or indentation error in HTML can break an entire application. That is why using a dedicated diff checker is essential for modern development.

Diff Guru's HTML Code Compare tool is engineered to help you diff code accurately. Unlike standard text comparison tools, our engine understands HTML syntax. It visualizes structure, keywords, and logic changes with distinct colors, allowing you to compare code files confidently and merge changes without conflicts.

How to Compare HTML Code

Paste HTML Code

Copy your original code snippet into the left panel and your modified version into the right panel to prepare for the code compare.

Run Diff Checker

Click the "Compare HTML" button. Our engine will instantly diff code to identify additions, deletions, and modifications.

Analyze & Merge

Review the syntax-highlighted changes. Use the merge tool to combine the best parts of both versions into one final file.

Supported Formats & Languages

Diff Guru supports a vast array of formats. Select a specific tool below for optimized syntax highlighting and comparison.

Programming

Web & Scripts

Data & Config

DB & Docs

Why Choose This HTML Diff Tool?

Syntax Awareness

We don't just diff text; we diff code. Enjoy native HTML coloring for better readability.

Secure Client-Side Processing

When you compare code here, it stays on your machine. We strictly adhere to privacy, so your proprietary logic is safe.

Instant Performance

No upload times. Our diff checker runs in your browser memory for immediate feedback.

Frequently Asked Questions

Yes, Diff Guru is a completely free diff checker. You can compare HTML code files as often as you like without any hidden costs or subscription fees.

Absolutely. We use client-side processing, which means your code never leaves your browser. It is not uploaded to our servers, making this the most secure way to diff code online.

Yes! Unlike basic text comparison tools, our tool recognizes HTML syntax. It highlights keywords, comments, strings, and operators to make reading the code diff much easier.

Yes. When you compare code and find differences, you can use the merge arrows to move code from the original file to the changed file, allowing you to construct a final version easily.