Compare PDF
Compare two PDF files online for free. See every word that was added, removed or changed between two versions, highlighted side by side.
Original
Select the original PDF
Earlier version
Changed
Select the changed PDF
Newer version
How to Compare Two PDF Files
Need to know what changed between two versions of a document? ToolifyPDF compares two PDF files and shows you every difference: words that were added, removed, or changed are highlighted on both versions, side by side, with a list of all the changes. Unlike tools that compare pictures of the pages, it compares the text itself, so a paragraph added on page 2 doesn't make every following page look different. It's ideal for contracts, reports, offers, and any document that goes through several versions. Download a comparison report in PDF to share or keep. No software to install, no account, and no watermark.
Every Change Highlighted
Removed words are highlighted in red on the original, added words in green on the new version. Changed words show on both, so you see what was there before and what replaced it.
Real Differences Only
The text of both files is compared as one continuous document, so text that only moved to another page, or a different line break, isn't reported as a change.
Side by Side, With a Report
Go through the differences one by one with both pages side by side, or open the list of all changes. Download a PDF report of the pages with changes.
How to Compare PDF Files
- Select the files: Choose the original PDF on the left and the changed PDF on the right.
- Compare: Click "Compare". Both files are read and every difference is found.
- Review: Go through the differences with the arrows or the list. Both versions are shown side by side, with the changes highlighted.
- Download: Click "Download report" to save a PDF with all the pages that have changes.
Compare PDF Files on Windows, Mac, iPhone, and Android
ToolifyPDF works in any modern browser. You can compare PDF files on Windows, Mac, Linux, iPhone, iPad, or Android without installing software. It works in Chrome, Safari, Firefox, and Edge.
Why Compare PDF Files with ToolifyPDF?
Reading two versions of a long document line by line takes hours and it's easy to miss a changed number. ToolifyPDF finds every difference in seconds. It's perfect for:
- Checking what changed in a new version of a contract or agreement
- Reviewing edits to reports, offers, and quotes before signing
- Finding changed prices, dates, and amounts in invoices or price lists
- Comparing translations, drafts, and revised course material
- Making sure only the agreed changes were made to a document
FAQ
How do I compare two PDF files?
Select the original PDF and the changed PDF, then click "Compare". ToolifyPDF shows both versions side by side with every added, removed, or changed word highlighted, and a list of all the differences.
Is it free to compare PDF files?
Yes. You can compare PDF files online for free, with no account and no watermark. Each PDF can be up to 200 MB.
What differences are found?
Every difference in the text: words, numbers, sentences, and paragraphs that were added, removed, or replaced, including text in tables. Changes in formatting only, such as bold or color, and changes in images are not reported.
What if text moved to another page?
It isn't counted as a change. Both files are compared as one continuous text, so if a new paragraph pushes the rest of the document down, only the new paragraph is reported.
Can I compare scanned PDF files?
A scanned PDF is a picture of the pages, with no text to compare. Make its text readable with PDF OCR first, then compare the two files.
Can I compare a Word document with a PDF?
Convert the Word document to PDF first with Word to PDF, then compare the two PDF files.
What is in the comparison report?
The report is a PDF with each page that has changes shown side by side with the matching page of the other version, and the differences highlighted in red and green. It's easy to share or keep with your files.
Can I compare password-protected PDF files?
Yes. You'll be asked for the password of each protected file when you add it, then the files are compared as usual.
How do I compare PDF files on Mac or Windows?
Open ToolifyPDF in your browser, on Windows, Mac, Linux, or your phone, and select the two PDF files. You don't need Adobe Acrobat or any other software to compare PDF documents.
Is it safe to compare PDF files online?
Yes. Your files are sent over encrypted HTTPS connections and processed on secure servers. All uploaded and processed files are automatically deleted one hour after processing, and we never share your documents with third parties.
Advanced Features
Beyond showing the differences, our PDF compare tool offers several useful features:
- Word by Word: Even a single changed word or number is found and highlighted.
- Moved Text Ignored: Text pushed onto another page isn't reported as a change.
- Side-by-Side View: Both versions at the same zoom, with the matching pages shown together.
- List of Differences: Jump to any change in one click.
- PDF Report: Download the pages with changes, highlighted, side by side.
- Password Support: Compare password-protected PDF files.
💡 Pro Tip
Received a new version of a contract? Compare it with the one you agreed on before signing: a changed amount, date, or notice period stands out at once.
Privacy & Security
We take your privacy seriously. All file uploads and processing happen over encrypted HTTPS connections. Your files are automatically deleted from our servers after one hour, and we never store or share your documents with third parties. You maintain complete control over your data at all times.
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