How to use HTML Compare
- Enter or paste your HTML into the input field to begin.
- The result is computed live in your browser as you edit the input.
- When it looks right, Copy to save it.
About this tool
HTML Compare is a static, client-side tool with no backend. HTML Compare works on HTML in your browser, transforming or previewing the markup you paste locally.
Generated previews are escaped or sandboxed so pasted markup cannot affect the tool. Nothing you enter is uploaded, and it keeps working offline once the page has loaded.
Frequently asked questions
What does HTML Compare do?
Use HTML Compare to compare your input without installing anything; everything happens client-side.
Is HTML Compare free to use?
Yes — HTML Compare is completely free, with no usage limits.
Where is my data processed by HTML Compare?
Entirely in your browser — HTML Compare keeps your data on your own machine and sends nothing anywhere.
Will HTML Compare change my HTML structure?
HTML Compare only reformats or analyzes what you paste; the underlying structure of your HTML is preserved.
Does HTML Compare work on mobile?
Yes — HTML Compare is just a web page and runs on any modern browser, including phones and tablets.