Upload two PDFs to compare them visually side by side. Text differences are highlighted per page automatically.
Upload exactly two PDF files
Drag and drop files here, or click to browse
Left = original, right = revised. You can upload the same file twice to confirm they match.
About Compare PDF
Compare two PDF files side by side with visual diff and per-page text comparison. Spot changes between contract versions, report drafts, and signed copies. Runs in your browser.
PDF compare highlights moved text, layout shifts, and page differences — faster than manual line-by-line review.
How to compare pdf
- Upload two PDF files to Compare PDF.
- Review the side-by-side visual comparison.
- Inspect per-page text diffs for detailed changes.
Frequently asked questions
- Is Compare PDF free on OyoPdf?
- Yes. Compare PDF is free with no account required for standard use.
- Are my files uploaded to your servers?
- This tool runs in your browser on your device. Your PDF is not uploaded to our servers for processing.
- Can I compare two identical files?
- Yes. OyoPdf detects byte-identical files and identical content early so you get an instant match result.
- Is Compare PDF free?
- Yes. Compare PDF on OyoPdf is free for everyday use with no account required.
- Are my files private?
- OyoPdf is privacy-first. Processing runs in your browser whenever possible so files stay on your device.
- What file size is supported?
- Most tools support files up to 20 MB per upload.