HTML source diff

HTML Compare Tool

Normalize HTML markup before comparison so single-line minified source and indentation changes do not hide meaningful element, attribute, and text edits.

No upload Free to use Works on mobile

Compare tool

HTML Compare

Options

HTML differences

0 results

How to use HTML Compare

1

Paste both HTML versions

Use full documents or partial components and templates.

2

Normalize source formatting

Tags are placed on readable lines before comparison.

3

Review markup changes

Find inserted elements, removed attributes, and changed text content.

Common uses

Template reviews

Audit CMS, email, and component markup changes.

SEO checks

Spot changed headings, links, metadata, and structured content.

Regression debugging

Compare generated markup before and after a release.

HTML Compare FAQ

Is HTML Compare free to use? +

Yes. HTML Compare is free to use without an account or usage meter.

Is my data uploaded or stored? +

No. The processing for this tool runs locally in your browser. Entered content is not sent to our server.

Is this a visual screenshot comparison? +

No. This page compares normalized HTML source. Visual layout comparison requires rendering both pages with their CSS and assets.

Keep working

Related list tools

Clean

Strip HTML Tags

Convert HTML into readable plain text while decoding entities and preserving useful line breaks for block elements.
Clean

Find and Replace Text

Find and replace text online across multiple lines. Use literal text, whole-word matching, case sensitivity, or regular expressions with live result counts.
Compare

Compare Lists

Compare two lists online to find common items, items only in list A, and items only in list B. Case-sensitive and case-insensitive comparison supported.
Data

JSON Compare

Compare two JSON documents by keys and values instead of line order. Find added, removed, and changed paths in your browser.