SmartTools PDF Utility
Compare PDF Files Online
Compare two PDF documents to identify added and removed text. Upload your original and revised PDF files to find text differences and download a comparison report. Your files are processed directly in your browser.
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Added Text
Identify lines found only in the revised PDF.
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Removed Text
Identify lines missing from the revised PDF.
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Export Report
Save the comparison results as a text file.
Compare Two PDF Files Online
Need to find differences between two versions of a document? SmartTools PDF comparison tool helps you compare two PDF files and identify text that has been added or removed. It is useful for reviewing revised reports, contracts, assignments, proposals and other text-based PDF documents.
Upload your original PDF and revised PDF, then select Compare PDFs. The tool extracts readable text from both documents and displays lines that appear in only one version. You can also download the comparison results as a text report.
How to Compare PDF Documents
- Select the original PDF document from your computer.
- Upload the revised PDF document you want to compare.
- Click Compare PDFs to start the comparison.
- Review the added and removed text in the results.
- Download the comparison report as a TXT file if needed.
Features of Our PDF Comparison Tool
- Compare two PDF documents directly in your browser.
- Identify text lines present only in the revised document.
- Find text lines missing from the revised document.
- View added and removed text separately.
- Download comparison results as a text report.
- Process files locally in your browser without server uploads.
Frequently Asked Questions
1. How can I compare two PDF files for free?
Upload your original and revised PDF files, click Compare PDFs, and review the added or removed text. You can download the results as a text report.
2. Can I compare PDF files without installing software?
Yes. This tool works in a compatible web browser. You do not need to install a separate PDF comparison application.
3. Are my PDF files uploaded to a server?
No. This comparison tool extracts text directly in your browser. Your selected PDF files are not sent to our comparison server.
4. Can this tool compare scanned PDF documents?
Scanned PDFs usually contain page images instead of selectable text. This version does not include OCR, so scanned documents may need text recognition before comparison.
5. What happens when a line is changed?
If a line is changed, the original line may appear as removed and the revised line may appear as added. This version compares extracted text lines rather than identifying individual word changes.
6. What is the maximum PDF file size?
Each PDF file can be up to 50 MB. Very large or complex documents may require additional browser memory.
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This tool compares extracted text lines, not exact visual layout or images. Scanned PDFs may require OCR. Lines with changed wording may appear as both removed and added.