Free online tool to compare two HTML files and find difference.

Compare and find difference in two HTML files easily for free. Just paste or enter original and modified HTML code in respective editors and click 🔍 Compare button to get diff.
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How to compare HTML files/code side by side & View Diff

Copy the original HTML code in the block on the left and modified HTML code in the right block. Just click Check button to view side by side comparison.

Online HTML Diff Tool Features

Is this HTML diff Checker free?

Yes, this service is free and we don't save any data unless you explicitly ask us to save.

What are other features of this HTML Comparator?

  • This tool can also beautify or format your HTML code. Right click on the pane you want to beautify/prettify & select Format Document or click Format button. This is very helpful when you are comparing code from websites that often minify HTML files.
  • This HTML diffing tool can show syntax highlighting for your comfort.
  • You can easily find all the occurances of particular string if you want to change them.


  • Privacy friendly: All text processing & comparison is done in your browser. Your data remains private.
  • Inline diff mode, word wraping, dark/high-contrast theme support.
  • Change statistics and line by line change navigator.
  • No installation. Works in all modern browsers.
  • Syntax highlighting & formatting for various programming languages.
  • 128-bit SSL/TLS encryption for uploaded/shared diffs.
  • Export diff as single PDF file in combined mode.