Compare PDFs
Compare two PDFs page by page and export a difference report.
A practical guide to Compare PDFs
Compare PDFs analyzes two document versions to expose page-level or content differences. Meaningful review depends on aligned editions, similar page structure, and human interpretation of each detected change.
Example: review a revised agreement
Load the signed-off draft and the new version in the correct order, inspect changed clauses and moved pages, and verify every material difference visually.
Task-specific steps
- 1
Choose the known baseline and revised PDF, confirming their names, dates, and page counts before comparison.
- 2
Run comparison and review detected additions, removals, movements, and visual changes in document order.
- 3
Cross-check every important difference against both source pages and record what requires approval or correction.
Options that affect the result
- Baseline-versus-revised order gives additions and removals a consistent meaning.
- Page and visual review helps separate formatting movement from substantive content change.
Limitations to know first
- Reflow, font substitution, scanning noise, or page shifts can create many changes that are not semantic edits.
- Automated comparison cannot decide whether a detected difference is legally or operationally important.
Questions specific to this task
Why does a small layout change create many PDF differences?
Moving text changes pixel positions and sometimes reading order, so one formatting edit can affect a large page region.
Can PDF comparison prove two files are identical?
A byte hash can prove exact binary identity; visual comparison instead helps inspect rendered or extracted differences between nonidentical files.