Compare Two PDFs Online Free
Compare two PDF files side by side — see page count differences, text similarity, and a list of page-level changes. Free, private, runs entirely in your browser.
Original PDF
Click to select a First PDF, or drag and drop
Your file never leaves your browserModified PDF
Click to select a Second PDF, or drag and drop
Your file never leaves your browserHow to Compare Two PDFs
- Upload the original PDF and the modified version side by side.
- Click Compare PDFs — the tool extracts text from both and analyses differences.
- Review the side-by-side page counts, text similarity score, and a list of page-level differences.
Example
Uploading a contract draft and its revised version reveals which pages changed, how similar the text is overall, and whether the page count was altered — useful for spotting edits without manual side-by-side reading.
Common Use Cases
- Verifying that only the expected sections were edited in a revised document.
- Spotting differences between two versions of a report or proposal before signing.
- Auditing changes across revisions of legal, academic, or financial documents.
FAQ
- Does this compare images or formatting? No — the comparison is based on the text layer only. Visual differences (fonts, images, layout) are not detected.
- How is similarity calculated? Word-by-word matching across both files produces a percentage of matching words relative to the total word count of both documents.
- Is my file uploaded anywhere? No — both files are processed entirely in your browser.