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Compare PDF

Compare two PDFs side by side and highlight every difference.

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Max 5MB · encrypted in transit · auto-deleted after use · 10 conversions left today · Sign up free for more

  • Encrypted upload
  • Deleted after download
  • No sign-up needed
  • Works on all devices
Input PDF
Output PDF
How it works

How to Compare Two PDF Files Online

  1. 1 Upload two PDFs

    Add the two document versions you want to check.

  2. 2 Spot the differences

    See a side by side view that highlights every change.

  3. 3 Review or download

    Save the comparison or keep reviewing the changes.

What you get

Features of Compare PDF Tool

Compare PDF

  • Spot every change

    Compare two PDFs side by side and see exactly what differs.

  • Highlighted differences

    Added, removed and changed content is clearly marked.

  • Text and layout

    Catches wording edits as well as layout shifts between versions.

  • Great for contracts

    Ideal for reviewing revisions before you Sign PDF.

  • Any device

    Compare PDFs in the browser with nothing to install.

  • Private

    Both files are encrypted and deleted automatically afterwards.

Checking two versions of a PDF manually can take a lot of time, and it's easy to miss even small changes. The Compare PDF tool makes the process simple by placing both files side by side and highlighting everything that has been added, removed or edited. You can quickly review contracts, reports, assignments or other PDF documents without reading every page yourself. The tool is completely free to use, requires no signup, adds no watermark and works in any web browser on desktop or mobile devices.

Easily Find Changes Between Two PDF Files

Finding differences in a long PDF can be difficult, especially when only a few words or numbers have changed. This tool automatically highlights all changes, including added text, deleted content and edited sentences. This allows you to review document revisions in just a few minutes. If you are checking an updated contract, reviewing edits from a colleague or comparing two versions of a report, the highlighted differences make it easy to confirm exactly what has changed. If the pages in your PDFs are not in the same order, organize them first before comparing. Matching page order helps produce more accurate comparison results.

Get Better Results with Scanned PDF Files

Compare-PDF works best with PDFs that contain selectable text. If your document is a scanned copy, it is treated as an image, which makes text comparison less accurate. For the best results, first convert each scanned PDF into a searchable document using OCR tool. Once the text is searchable, the tool can detect changes much more accurately. This is especially useful when comparing a signed scanned document with its original digital version. After reviewing the changes, you can merge both PDF files into one file or keep the approved version for future reference.

Compare PDF Anywhere and On Any Device

You can compare PDF files directly from your web browser without installing any software. The tool works on Windows, Mac, Android, iPhone and tablets, making it easy to review documents wherever you are. Your files are transferred through a secure encrypted connection and are automatically deleted from the server after processing. This helps protect your privacy when working with contracts, legal documents, financial records or other confidential files.

FAQ

Frequently asked questions

How do I compare two PDF files for differences?
Upload the two PDF versions you want to compare and the tool finds and highlights the differences. You can easily see added, removed or changed content without checking both files line by line. It is useful for comparing drafts with final versions or making sure a signed document matches the approved copy.
Is the compare-PDF tool free to use?
Comparing two PDFs is free, with no account needed and no watermark added to your downloads. You can compare contract changes, policy updates or document drafts whenever you need. The tool works on modern browsers on both desktop and mobile, so you can check differences from your computer or phone.
Can it compare scanned PDFs or only text documents?
The tool works best with PDFs that contain selectable text because it can compare words and sentences more accurately. Scanned PDFs are just images, so use OCR first to add readable text before comparing. It can still find visual differences, but text based PDFs provide the most accurate word by word comparison.
What kinds of changes does the comparison highlight?
The tool highlights content that was added, removed or changed between two PDF versions, making edits easy to find. It helps you spot changed numbers, updated clauses or deleted text that you may have missed. Reviewing the highlighted changes is much faster than reading both long documents from start to finish.
Do both PDFs need to have the same layout to compare?
The two PDFs do not need the exact same layout, but the best results come when they are different versions of the same document. If pages are moved around, the tool may show large sections as changed. To get clearer results, you can organize PDF pages first so both files follow the same order. Comparing similar drafts gives more accurate and useful differences.
Are my files kept confidential during comparison?
Both PDF files are uploaded securely through an encrypted connection and automatically deleted from the server after the comparison is complete. No signup is required, so your files are not linked to an account. The documents are only used to find differences and are not stored or shared after you finish.
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