About Compare PDF
Compare PDF helps teams see differences between two PDF versions—contracts after redlines, policy manuals year over year, or design specs labeled v3 versus v4. Instead of eyeballing hundreds of pages, a structured comparison highlights textual shifts so lawyers, compliance officers, and project managers can focus on what actually changed. It supports due diligence, audit trails, and release notes grounded in real diffs.
Comparison quality depends on whether pages are text-based or scanned images; OCR’d text compares more cleanly than raw bitmaps. Layout changes—moved paragraphs versus edited sentences—may appear differently depending on the engine. Always treat automated diff output as assistive, not legally definitive, for signed agreements—human review still matters.
Upload two files within the size limit; rename them clearly before upload so you know which is “left” versus “right” in the report. After review, merge accepted changes into a single canonical PDF or protect the final version.
Avoid uploading documents under attorney-client privilege or export-controlled data unless counsel approves cloud processing. For public GitHub PDFs or marketing brochures, comparison is lower risk—still verify no accidental PII appears in either file before upload.
Supported formats
This tool accepts PDF. Multiple files are supported when the control allows it—order usually matches page order in the output. Always respect the upload limit shown next to the form before sending large documents.
How to use
- Click Upload and choose your files.
- Set any options shown (compression, mode, ranges, etc.).
- Press Run tool and wait until the progress finishes.
- Download or copy the result from the result panel.
If processing fails, check the upload size limit on the form, try fewer or smaller files, or retry in a fresh tab.
Security & privacy
Files and text you send are processed to produce your result and are not intended for long-term storage on your behalf. Avoid uploading passports, bank details, medical records, or legally sensitive material unless you accept the risks of any online service. For confidential workflows, prefer offline software on a device you control. Read our privacy policy for site-wide practices.