Is Compare PDF Files free?

Yes, Compare PDF Files on PDF Merge Toolkit is completely free. No subscription, no sign-up, and no watermarks on your output.

Are my files safe when using Compare PDF Files?

Yes. All files are transferred over 256-bit SSL encryption and are permanently deleted from our servers within 30 seconds of processing. We never read or store your document contents.

Do I need to create an account?

No account or sign-up is required. Simply visit the page, upload your file, and download the result.

What is the maximum file size?

The maximum file size is 20 MB per upload. For larger files, try compressing your PDF first using our free Compress PDF tool.

🔒 We never store your data ✦ ⚡ Lightning fast conversions ✦ ✅ 100% Free — No sign-up required ✦ 🌐 Works entirely in your browser ✦ 🚫 No watermarks on any output ✦ 📄 48+ PDF tools in one place ✦ 🔒 We never store your data ✦ ⚡ Lightning fast conversions ✦ ✅ 100% Free — No sign-up required ✦ 🌐 Works entirely in your browser ✦ 🚫 No watermarks on any output ✦ 📄 48+ PDF tools in one place ✦

All Tools

Compare PDF Files

Find text differences between two PDFs — get an HTML diff report

Original

Drag & drop or click to select

Modified

Drag & drop or click to select

Output: HTML Diff Report

Additions highlighted in green · Deletions in red · Open in any browser

.html

Text is extracted from both PDFs and compared line-by-line. Formatting differences (fonts, colours, layout) are not compared — only text content.

Max 20 MB per file. Two PDFs required.

Tool Guide

Why use Compare PDF Files Online?

Upload two PDF files and our tool analyses them page by page, highlighting additions, deletions, and modifications in colour-coded diff view. Perfect for reviewing document revisions, contracts, and legal documents.

100% free — no hidden fees ever
No account or sign-up required
Instant browser-based processing
Files auto-deleted within 30 seconds

Upload

Select or drag your file

Process

One click — done instantly

Download

Save your result file