Before processing
Choose the correct baseline and revised files, align corresponding editions, and note expected changes in pagination, scans, fonts, headers, or page geometry.
Premium online PDF tool
Compare two PDF files and find changes
Review two versions of a document side by side and surface visual differences that deserve a closer look.
Compare PDF is part of TapScanner Premium — see exactly what it costs and what else it unlocks before you decide. TapScanner has 100M+ mobile downloads
Drop your PDF here
Drag a file in, or choose one — it opens in the workspace below, already loaded.
PDF, up to 20 MB. Larger files still work — add them in the workspace itself.
What you get
A visual review of differences between two PDF versions
Compare an original and revised document to surface page changes that deserve focused human review and follow-up.
- Compare two document versions
- Highlight visual differences
- Speed up review workflows
See the workflow before you start
Compare PDF: from your file to a checked result
Compare an original and revised document to surface page changes that deserve focused human review and follow-up. The three decisions below show what to provide, what to configure, and what to verify before you share the output.
Upload the original and revised PDF files.
Run the document comparison.
Review the highlighted differences carefully.
Your file
1Choose the setting
2Ready to review
3Result to check
Compare both PDFs and use the highlighted differences as a review aid, then assess the meaning of each change yourself.
Plan the job
Prepare and verify Compare PDF
A quick source check prevents avoidable rework. After processing, open the output and verify the details that matter for this specific PDF task.
Before relying on the result
Review every reported difference in context and manually inspect important pages for moved content, false positives, omitted changes, images, signatures, and metadata.
How it works
How to use Compare PDF in three steps
Upload the original and revised PDF files.
Run the document comparison.
Review the highlighted differences carefully.
Complete the job
Compare PDF from upload to a checked result
Follow the whole path before you start: choose the source, set the job, run the workspace, verify the output, and continue only when the result is right for its next use.
Choose the source
Configure the job
Run the tool
Check the result
Continue
After processing
Review, download, and continue after Compare PDF
A completed result still deserves a quick check. Keep the original, inspect the output type and contents, and decide what should happen next before you share it.
Output to verify
Result type: PDF outputCompare an original and revised document to surface page changes that deserve focused human review and follow-up.
Check page order, orientation, text, permissions, and any visible signatures before sharing the PDF.
Review the output
Check page order, text, orientation, and the number of files in the workspace before sending anything.
Download your copy
Use the workspace Download action after the result is ready. A browser handoff does not prove that a file was saved to disk.
Delete now when offered
If this workspace offers Delete now, use it after downloading. Availability depends on the tool and current result path.
Continue with the next task
Keep the source until you have verified the result, then move to a related PDF task or return to the tools catalog.
Practical example
Check what changed in a revised contract
Starting point
A new contract draft arrives with a similar filename and no reliable summary of the edits.
Result to check
Compare both PDFs and use the highlighted differences as a review aid, then assess the meaning of each change yourself.
Compare PDF is a Premium tool
What you get when you unlock Compare PDF
Comparing revisions is a Premium tool. It replaces reading two contracts side by side to find the clause that moved.
Usually next: Edit the differences you accept, then sign and protect the final version.
Paddle shows the exact amount, taxes, renewal date, and any eligible trial before you confirm. Stop future renewals yourself from your TapScanner billing account.
- OCR that makes scans searchable and selectable
- Editing the text that already exists in a PDF
- Repair for files that refuse to open
- Compare two revisions and see what changed
- Up to 100 files and 1 GB in one task, no page cap
- No daily job cap, subject to fair-use protection
Work with confidence
Clear limits and an output you can review
Know the access level
Compare PDF requires a TapScanner Premium plan. The requirement is shown before processing.
Keep document data out of analytics
TapScanner web's application data layer rejects filenames and document contents. Published analytics destinations require separate configuration verification.
Temporary storage during processing
Hosted processing paths may use temporary files. In the pinned core's normal download path, the output file is removed when the stream closes; scheduled cleanup covers stale temporary files.
Hosted processing
Web tools may send files to TapScanner's hosted processing service. We do not currently offer a customer-selectable processing region, so do not assume processing stays on your device or in a particular country.
Delete when offered
Delete-now is available only when a result screen explicitly offers it; it is not yet supported by every web tool.
Check the finished file
Open the downloaded result and verify important pages, values, formatting, and permissions before relying on it.
Compare PDF tools
Choose between Compare PDF and the next likely tools
Match the tool to the result you need now. The current choice is shown first, followed by three focused alternatives for a different document outcome.
Current tool
Compare PDF
- Choose this tool when you need
- A visual review of differences between two PDF versions
Alternative
Edit PDF
- Choose this tool when you need
- A PDF with targeted text and image-position changes
Alternative
Redact PDF
- Choose this tool when you need
- A reviewed PDF with selected content permanently redacted
Alternative
PDF Workflows
- Choose this tool when you need
- A reusable sequence for recurring PDF work
Before you start
Not sure this is the right job? Read this first
Questions
Compare PDF FAQ
Is Compare PDF included in TapScanner Free?
Compare PDF is a TapScanner Premium tool. The workspace shows that requirement before processing, so you can review the available plan before the job starts.
Does PDF comparison understand the meaning of text changes?
The comparison highlights document differences for review. You should still evaluate whether each change is intentional and accurate.
Do I need to install software for Compare PDF?
No. TapScanner runs in a modern web browser, so you can upload, process, and download the result without installing desktop software.
Ready to use Compare PDF?
Add your file and finish the job. The limits that apply are shown before processing starts, not after it fails.
Open Compare PDF