Got a "final" version back and not sure what they changed? Upload the old and the new PDF and get one file with the differences marked, so you don't have to read both line by line. Free, no sign-up.
Most free comparison tools only tell you that two files are different, not where or why. You end up scrolling through both documents yourself to find the actual change, which defeats the purpose of using a tool at all.
ILOVEPDF.BIZ marks the differences directly on the page, so the comparison does the work instead of just confirming something changed.
Dedicated redline tools built for law firms exist for a reason: reviewing a revised contract by eye is slow and error-prone, and a missed clause change can be costly. ILOVEPDF.BIZ gives you the core of that same workflow without a paid subscription or account setup.
Upload the original contract and the revised version, and every clause edit, added paragraph, and deleted line is marked automatically.
If your firm compares documents daily at high volume, a dedicated paid tool may still make sense. For everyone else, comparing occasionally, checking a single revised agreement, or reviewing a client’s redline before a call, this is enough.
For example: A landlord sends a renewed tenancy agreement and says nothing has changed apart from the dates. You compare it with last year's PDF and find the notice period has gone from one month to two. You raise it before signing, not after.
Some PDF documents need preparation before their differences can be compared accurately. Here are four common situations and what to do before uploading your files.
A scanned document is essentially a picture of the page, so its text cannot always be compared word for word. Run both files through OCR PDF first to convert the scanned content into searchable text, then compare the resulting PDFs.
Compare two versions of a Word document by converting both files into PDF format first. Use our Word to PDF tool to convert each version, then upload the PDFs for comparison.
Password-protected PDFs need to be unlocked before comparison. Use Unlock PDF to remove the protection from both files using the required passwords, then upload the unlocked PDFs.
The Compare PDF tool compares two files at a time. When reviewing three versions, compare version 1 with version 2 first, then compare version 2 with version 3 to identify the changes between each version.
For example: You have a signed paper copy of a contract and the PDF you received later by email. Scan the paper copy, run it through OCR PDF, then compare it with the emailed PDF to check whether the two versions match.
Yes. Both files travel to our servers over an encrypted (SSL) connection and are deleted automatically 1 hour after upload, together with the comparison result. Nobody at ILOVEPDF.BIZ opens them, and we don't share or sell anything you upload.
This matters most for confidential documents like contracts, financial reports, or legal filings, where the two versions being compared may both contain sensitive information. Neither file is kept longer than necessary to generate your result.
If either file is password protected, use Unlock PDF to remove the protection first, then upload both versions here.
Yes. Comparing two PDFs is free, with no sign-up and no limit on how many comparisons you run.
No. Each comparison supports two PDF files at a time. To review multiple versions, compare them in pairs.
Yes. Compare PDF works in mobile browsers on iPhone and Android without requiring an app.
There is no fixed file-size limit for comparing PDFs. Larger documents may take longer to upload and process.
Yes. Download the comparison result as a PDF and print it like any other document.
Yes. Scanned PDFs can be compared as page images, but identifying exact text differences may be more difficult. You can use our OCR PDF tool to make scanned text searchable before comparing.
Compare PDF supports PDF files only. Convert your Word documents using our Word to PDF tool first, then upload both PDF versions for comparison.
Your original PDF files and comparison results are automatically deleted from our servers after 1 hour.
One hour. After that, both files and the comparison result are deleted from our servers automatically.
combine the reviewed file with a cover page or appendix
permanently remove sensitive text before sharing a comparison result
secure the comparison output before sending it
remove password protection before comparing a locked file
convert scanned pages to searchable text before comparing
to convert Word document versions into PDFs before comparing them.
to sign the final document once you are happy with the changes.
