Compare Two PDF Documents

Upload the original and the modified version to visually detect changes instantly.

Original Document

Click or drag & drop PDF here

Modified Document

Click or drag & drop PDF here

How to spot changes in your PDF files

Finding exact differences between two versions of a document can take hours if you do it manually. Our comparison tool makes this process instant. You just need to upload the original file on the left and the modified version on the right. Once both files load, click the start button to view them side by side.

For a closer look at minor layout shifts or font changes, you can switch to the overlay mode. This feature stacks the two files on top of each other. You can then change the blend settings to highlight exact pixel differences, making it incredibly easy to catch missing signatures, altered clauses, or design adjustments.

Secure processing on your own device

Many business contracts and legal agreements contain highly sensitive information. Sending these files to an external server creates a major privacy risk. We designed this utility to run entirely inside your web browser. The code reads your files locally and never uploads them to the internet. You get a fast and completely private way to verify changes in your documents.

Frequently Asked Questions

Common questions about visually comparing PDF files.

How does the visual comparison work?
The tool creates a high quality image of every page in your original and modified files. It then places these images next to each other or layers them so your eyes can easily catch missing words, moved logos, or changed paragraphs.
Does this tool extract text to find changes?
No. This specific utility uses visual diffing. It compares the visual pixels of the pages rather than reading the underlying text characters. This makes it highly effective for checking layout changes and graphic design proofs.
Are my sensitive files uploaded to a server?
Your files never leave your computer. The entire comparison process happens directly inside your web browser using your local device memory.
Is there a limit on the file size I can compare?
We do not enforce any strict file size limits. However, because the tool relies on your computer hardware, comparing documents with hundreds of pages might temporarily slow down your browser.