Compare Two PDFs
Quickly diff two PDF files before signing or approving changes.
Quick Summary: Compare Two PDFs
Quickly diff two PDF files before signing or approving changes. Siliph runs in your browser with encrypted uploads and a built-in AI assistant for portal-specific settings.
What does Compare Two PDFs do?
Quickly diff two PDF files before signing or approving changes. Compare PDF highlights visual differences between two document versions—spotting text edits, moved figures, and replaced paragraphs during contract review.
When to use Compare Two PDFs
- You need to compare two pdfs quickly without installing apps
- The file contains sensitive data and you prefer local processing
Legal and procurement teams receive revised contracts where redlines are missing or untrustworthy. Side-by-side pixel or text-aware comparison surfaces added commas, deleted indemnity clauses, and swapped exhibits faster than manual line reading.
Siliph Compare PDF aligns pages in the browser-backed engine with encrypted uploads, marking additions in one color and deletions in another. Scanned comparisons work when OCR layers exist; purely image scans compare visually.
Use comparison output as an internal QA step before signing—export a summary PDF for audit trails showing exactly what changed between draft v3 and v4. Large documents may compare faster when you extract changed chapters first with Extract Pages.
Auto-deletion within two hours on the free tier protects negotiation confidentiality, and comparison requires no signup. Flatten PDF afterward if the comparison report itself must be immutable.
Pair with Redact PDF when differences reveal confidential third-party names that should not appear in the shared comparison file.
Siliph edit utilities—crop, rotate, headers, Bates numbers, metadata—apply changes in the browser with encrypted handling from the moment you drop a file. Finished PDFs auto-delete within two hours on the free plan, and every edit workflow opens without signup.
How Compare PDF works
This interactive preview demonstrates the interface layout and processing controls you will find in our workspace above. Everything is designed to be fast, responsive, and completely secure.
Click or drag PDF files here
Supports files up to 50 MB / 50 Pages
How to use Compare PDF online — step by step
Follow these detailed steps to complete your task securely in the cloud.
Upload files
Drag and drop your files into the workspace, or click browse to choose files securely.
Configure parameters
Adjust the settings available on the layout options panel to your preferences.
Process document
Click the process button to start editing securely in the cloud.
Download output
Save the final processed file directly to your desktop or device.
Key Features & Benefits of Compare PDF
Discover why thousands of professionals trust Siliph for fast, high-quality document editing and conversion.
AI Tool Assistant
Built-in AI suggests optimal settings and answers questions for every PDF tool.
Rich Annotations
Modify pages layout. Add custom text elements, type boxes, and highlight blocks.
Handwritten Signatures
Draw your signature, type your name using a cursive font, or upload a stamp scan.
Visual Shapes
Draw rectangles, circles, arrows, and custom outlines directly on document sheets.
Frequently asked questions about Compare PDF
Quickly diff two PDF files before signing or approving changes. Siliph is free to start — no signup required.
No. The tool runs in your browser on phone, tablet, or desktop.
Yes. Siliph lets you use Compare PDF for free. The free plan includes 3 tasks per hour with files up to 50 MB or 50 pages. Paid plans remove these limits and add priority processing.
Yes. Files are transferred over an encrypted HTTPS connection, processed automatically without human access, and deleted from our servers within 2 hours on the free plan.
No. Compare PDF runs entirely in your web browser and works on Windows, Mac, Linux, Android and iOS. There is nothing to download or install.
Embed this tool on your site
Add Compare PDF to your blog or website for free. The embed includes a dofollow backlink to Siliph when you use the attribution snippet below — that helps both sites rank.
Embed (iframe)
<iframe src="https://siliph.com/compare-two-pdfs?embed=1" title="Compare PDF — Siliph" width="100%" height="620" style="border:0;border-radius:12px;max-width:900px;" loading="lazy" allow="clipboard-write"></iframe> <p style="font-size:12px;color:#666;margin-top:8px;"><a href="https://siliph.com/compare-two-pdfs" title="Compare PDF — Siliph" rel="dofollow">Compare PDF</a> powered by <a href="https://siliph.com/" title="Siliph — Free PDF Tools" rel="dofollow">Siliph</a></p>
Link for blog posts / tool lists
<p style="font-size:12px;color:#666;margin-top:8px;"><a href="https://siliph.com/compare-two-pdfs" title="Compare PDF — Siliph" rel="dofollow">Compare PDF</a> powered by <a href="https://siliph.com/" title="Siliph — Free PDF Tools" rel="dofollow">Siliph</a></p>
Direct link: https://siliph.com/compare-two-pdfs
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