How to use Compare HTML Online
- Paste the HTML you need to compare into the input box.
- Watch the output update instantly while you adjust the HTML.
- When it looks right, Copy to save it.
About this tool
Compare HTML Online is a static, client-side tool with no backend. Compare HTML Online works on HTML in your browser, transforming or previewing the markup you paste locally.
Your markup is never uploaded. Nothing you enter is uploaded, and it keeps working offline once the page has loaded.
Frequently asked questions
How do I use Compare HTML Online?
Compare HTML Online runs entirely on your device: add your input, and it compares it locally in real time.
Does Compare HTML Online cost anything?
No — Compare HTML Online is completely free, with no sign-up and no hidden limits.
Where is my data processed by Compare HTML Online?
Entirely in your browser — Compare HTML Online keeps your data on your own machine and sends nothing anywhere.
Will Compare HTML Online change my HTML structure?
Compare HTML Online only reformats or analyzes what you paste; the underlying structure of your HTML is preserved.
Does Compare HTML Online work on mobile?
Yes — Compare HTML Online is just a web page and runs on any modern browser, including phones and tablets.