AlineaDoc: compare two documents and detect all differences in seconds.
Compare two versions of a quote or a contract and mark what changed before signing or approving.
AlineaDoc is a private document comparison tool that runs locally in your browser.
Review what matters before you send or sign.
AlineaDoc shows changes clearly: added, removed, and modified text, plus moved paragraphs. Check in seconds whether the version in front of you is really the right one.
FAQ: compare documents without uploading files
How do I compare two PDFs and see the differences?
Open the original PDF and the revised version in AlineaDoc. The comparator detects every change — added, removed, or modified text — and highlights it instantly. Everything runs in your browser: we do not send your files to a third-party server to analyze them.
Are my documents uploaded to a server?
We do not send your files to a third-party server to analyze them. Comparison runs in your browser. If you create an account, your email is stored for access; analytics load only if you accept cookies.
Can I compare two versions of a Word contract?
Yes. AlineaDoc accepts DOCX and PDF files. Open both contract versions and detect changes in clauses, figures, and terms — even if entire paragraphs were moved.
Is it free and do I need to sign up?
Yes, it's free and you don't need to sign up to compare documents. Drag your two files and get results in seconds. You can create a free account if you want to increase your daily limits.