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PDF Compare

Upload two PDF files to compare them side-by-side or overlay them to spot differences.

Compare PDF Files

Select or drop the two PDF files you want to compare.

or drop PDFs here

Drop PDF Files to Compare

Only PDF files are supported

PDF comparison tool icon

Compare PDF Documents Online for Free

Need to find what’s changed between two versions of a file? Use our free PDF compare tool to instantly identify differences. You can analyze two documents side-by-side or with a visual overlay. This works with any standard Portable Document Format (PDF), and because all processing is secure and happens in your browser, your files are never uploaded.

Why Use Our Free Document Comparison Tool?

An interface showing the two methods to compare PDF documents online: text and visual.
  • 100% Secure & Private: First and foremost, your files stay on your computer. All processing happens in your browser, guaranteeing that your sensitive documents remain completely confidential.
  • Two Comparison Modes: In addition, you can choose between a side-by-side **Text Compare** to spot wording changes, or a **Visual Compare** that overlays the documents to highlight layout and image differences.
  • Instant & Unlimited: Furthermore, our tool is completely free, with no limits on file size or usage. Get your results in seconds without any registration or hidden costs.
  • No Installation Required: Finally, you can use this powerful utility instantly from any device. There is no software to download and no account is ever needed to begin.

How to Check Your PDFs for Differences

Our intuitive online tool makes it simple to spot changes. Follow these easy steps to analyze your files in seconds:

  1. Upload Your Two PDF Files

    To begin, click the “Select PDF Files” button or drag and drop the two documents you want to analyze into the upload area.

    Uploading two PDF files to the online compare tool.

  2. Choose a Comparison Mode

    Next, select either “Text Compare” for a side-by-side analysis of wording changes or “Visual Compare” to overlay the documents and spot layout differences.

    Selecting between text and visual comparison modes.

  3. Download Your Comparison Report

    Finally, after reviewing the highlighted changes, click the “Download Report” button to get a new PDF that clearly marks all the changes between the two versions.

    Downloading the final report with all differences highlighted.

Once you’ve identified the changes, you might need to take further action. You can easily Merge PDF files to combine versions, Extract PDF Pages that are important, or Sign PDF documents to finalize them.

Frequently Asked Questions

Is it safe to analyze confidential documents?

Yes, it is 100% secure. Our file comparison tool performs all operations locally in your browser. Consequently, your files are never uploaded to our servers, ensuring your data remains completely private.

What kind of differences can this tool find?

Our utility is designed to find both content and visual changes. The “Text Compare” mode will highlight differences in wording, while the “Visual Compare” mode uses an overlay to show changes in layout, images, and formatting.

Is this service really free to use?

Absolutely. You can check your PDF files as many times as you need, without any limits, watermarks, or registration requirements. It’s a completely free utility.