A free Diffchecker alternative that keeps your text in the browser

The simplest Diffchecker alternative for text is AyeTab's Text Diff: it is free, has no account, and compares your two versions inside the browser rather than on a server. Keep Diffchecker if you mainly compare PDFs, Word files, spreadsheets or images, since that is where it does more.

Why people look for a Diffchecker alternative

Diffchecker does the core job well. You paste or drop two versions and it highlights every insertion and deletion, side by side by default. The reasons people search for something else tend to be practical:

• Several features, including the unified view, live editing and custom ignore rules, are limited on the free Basic plan and fully open only on the paid Pro tier.
• Diffchecker itself points to its desktop app as the way to keep files on your own device, which tells you where to look if privacy is the concern.
• Sometimes you just want a blank page with two boxes, no plan comparison and nothing to sign in to.

What AyeTab Text Diff gives you instead

AyeTab Text Diff is one of a set of free developer tools from AyeTab. The page has two numbered boxes, Original and Modified, and prints a unified diff below them with added and removed lines highlighted. That single-column format is the one Git and most code review tools use, so it reads familiar.

According to the tool page, input is not uploaded to AyeTab servers, there is no signup, no usage cap and no watermark, and it keeps working offline once loaded. You get the private, on-device comparison in a browser tab, without installing anything.

Side by side

A monitoring angle

If you track pages for changes, you already know the value of seeing exactly what moved. The same habit applies to the text you work with directly: a pricing page you saved last month against today's copy, two versions of a terms page, or a competitor's changelog pasted before and after an update. Paste the old copy into Original, the new one into Modified, and the diff shows the edited sentences. For regular, automatic checks of live pages, a page monitor is the right tool; for a one-off comparison of text you already have, a diff is faster.

The Chrome extension

AyeTab also comes as a free Chrome extension that replaces your new tab page with its developer tools and can open them in a side panel. A Ctrl+K or Cmd+K palette jumps to Text Diff by name, and favorites keep it pinned at the top. Get AyeTab for Chrome if you compare text often enough to want it one keystroke away.

When to stay with Diffchecker

Diffchecker is still the better pick when the files are not plain text. It compares documents, spreadsheets, images and folders, offers merging, and has a desktop app if you need that across a team. For pasted text, AyeTab covers the job at no cost and without the upload.

FAQ

Is there a free alternative to Diffchecker? Yes. AyeTab Text Diff is free with no account and compares text locally in the browser.

Is Diffchecker free? Diffchecker has a free Basic plan. Some features are limited on it and fully available on its paid plans.

Can I compare text offline without installing an app? AyeTab Text Diff keeps working after the page has loaded, even without a connection.