UseTool

Compare documents

Find line and word changes between two PDF, DOCX or TXT files.

Drop exactly two documents herePDF · DOCX · TXT

🔒 Both documents stay on this device.

How it works

How it works

  1. 1

    Add what goes in

    Drop your PDF, DOCX and TXT here, or pick it from your device.

  2. 2

    Start it

    Set two documents and comparison rules, then start. Everything runs in this browser — no upload, no queue, no account.

  3. 3

    Take the result

    The HTML · TXT is ready the moment the run finishes. Save it straight to your device.

What this tool does

What goes in
Reads PDF, DOCX and TXT. As many files at once as you like.
What comes out
You get HTML · TXT.
What happens to quality
Your file is read, not changed. The original stays exactly as it was.
Where it stops
Needs a text layer. A pure scan of paper has none — use text recognition first. Password-protected files cannot be opened. Very large files are limited by your device's memory, not by a server quota.
Compare documents
Compares paragraphs or lines first, then highlights changed words inside replacement blocks. PDFs include page numbers; the originals are only read and never rewritten.

Supported formats

PDFDOCXTXT

Good to know

Frequently asked questions

Can it compare scanned PDFs?

A scan has no text layer to compare. Use the linked local OCR tool first, then compare the recognised text.

Why is there a document-size limit?

The browser keeps both texts and the diff on your device. A fixed work limit prevents a very different pair from exhausting memory or freezing the tab.

What files can I use here?

Reads PDF, DOCX and TXT. As many files at once as you like.

What do I get back?

You get HTML · TXT.

Does the file lose quality?

Your file is read, not changed. The original stays exactly as it was.

When does it not work?

Needs a text layer. A pure scan of paper has none — use text recognition first. Password-protected files cannot be opened. Very large files are limited by your device's memory, not by a server quota.

Does the text stay searchable?

Yes, and compressing keeps it that way too: by default only the embedded photos are recompressed, while text, fonts and layout stay untouched. Merging, splitting and adding images move the pages as they are. Only the second compression method redraws every page as an image — then the text becomes part of the picture, and the tool says so before you start.

Can password-protected PDFs be opened?

No. A PDF locked with a password cannot be read in the browser, and the tool says so rather than producing an empty document. Remove the protection in the program that created the file first.

Private by design

Your files stay on your device

Both documents stay on this device.

Other tools

Ready-made

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