Compare PDF Online Free
Compare PDF versions and see every word that was added or removed.
- No upload
- Word by word
- No sign-up
- List of changes
Compare PDF versions of a contract, quote or report and see exactly what changed. Added words are highlighted in green, removed words are shown in a red note where they used to be, and every change is listed. Both files stay on your device.
How to Compare PDF Files
Put the older version first.
Choose both versions
Click Choose PDF files and pick the old and the new version, or drop both on the tool above.
Check the order
The first card is Old, the second New. Use Swap old and new if needed, then click Compare.
Read the changes
Scroll the list of changes, then click Download PDF for the marked-up copy.
How the Comparison Works
Reading two versions side by side and hunting for differences is slow, and a changed number is easy to miss. The tool does it for you, word by word.
When you compare PDF files here, the text of both versions is read and lined up. Words that are only in the new version are highlighted on its pages. Words that were taken out get a small red note at the place they used to be: click it to read them.
Punctuation and capital letters are ignored, so only real changes are shown.
Side by side
Both versions read and lined up.
Added
Highlighted in green.
Removed
Shown in a red note.
Every Change Marked on the Page
The new version with each addition highlighted, opened in the editor.
Reading Twice or Comparing Automatically
A missed change can cost money.
| Reading by eye | This tool | |
|---|---|---|
| Time | Minutes to hours | Seconds |
| Changed numbers | Easy to miss | Always listed |
| Record of changes | Your own notes | Marked PDF and a list |
Compare PDF Files Without Uploading
Two versions of a contract are twice the confidential information. TickPDF compares them inside your own browser tab, so neither file leaves your device.
There is no account and no copy on our side.
- 0files uploadedBoth files stays on your device.
- 0copies keptWe never see your pages.
- 0accounts neededOpen the page and start.
Works on iPhone, Android or Computer
- Windows
- Mac
- Linux
- Chromebook
- iPhone
- iPad
- Android
Open this page in your phone's browser, choose both PDFs and tap Compare. The list of changes appears on the screen.
It works the same on Windows, Mac, Linux and Chromebook, with nothing to install.
When People Compare Documents
People compare PDF versions before they sign, pay or publish.
Contracts
What did the other side change?
Quotes and invoices
Spot changed prices.
Leases
Check a renewal against last year.
Reports
Review edits to a draft.
Policies
See what changed in terms.
Essays
Compare two drafts.
Pro Tips for Faster Results
- Old firstThe second file is treated as new.
- Scanned filesRun OCR PDF on them first.
- Read the listRemoved words are only in the notes.
- Check numbersLook at every changed figure.
- Rename the resultAdd the date to the file name.
- ReplyAdd your own comments in the editor.
More PDF Tools
They all run in the same private editor.
OCR PDF
Make scans searchable.
Add comments
Leave notes for others.
Annotate PDF
Highlight, draw and note.
Sign PDF
Sign the document.
Redact PDF
Black out private details for good.
PDF Editor
Edit text, sign and annotate.
Compare PDF: Frequently Asked Questions
Answers to what people ask before they compare PDF files.
How do I compare PDF files?
Choose the old and the new version at the top of this page and click Compare. You get the new version with added words highlighted in green and a red note wherever words were removed, plus a list of every change.
Can I compare PDF files for free?
Yes. The free plan works on PDFs up to 50 pages and 20 MB, with 3 downloads a day, no account and no watermark. TickPDF Pro removes these limits.
Can I compare PDF files online?
Yes. The tool runs in your web browser on Windows, Mac, Linux and Chromebook, with nothing to install. Open your PDFs at the top of this page to start.
How do I compare PDF files on my phone?
Open this page in your phone's browser, choose both PDFs and tap Compare. The list of changes appears right away, and you can download the marked-up PDF.
Can I compare PDF files without Adobe Acrobat?
Yes. You do not need Acrobat or any other software. The tool runs in your browser, and the marked-up PDF opens in Acrobat, Preview, Chrome and every other PDF reader.
Is it safe to compare PDF files online?
Yes. Your PDF is not uploaded. It is opened and processed inside your browser tab and never sent to our servers, so nobody else sees it. Close the tab and nothing is left behind.
Does comparing change my PDF files?
No. Your two files are not changed. The result is a new copy of the newer version with the changes marked as comments, so the text and layout stay exactly as they were.
What is the easiest way to compare PDF files?
Drop both versions on the tool above and click Compare. The first file is treated as the old one; use Swap old and new if they are the wrong way round.
Ready to Compare PDF Files?
No account, no upload and no watermark: choose your PDFs at the top of this page.
Open the toolTickPDF compares two versions on your own device. Choose your files and compare PDF documents today.