How to use Compress PDF

Upload PDF.

Pick a compression level.

Download the smaller PDF.

Formula

Compression ratio ≈ 1 − (output_size / input_size).

📰 Learn More

Understand PDF compression levels and pick the right one for emails, archiving or print.

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About Compress PDF

Reduce PDF size while preserving quality.

Compress PDF is part of Smart2Office's suite of free browser-based utilities. It is designed to handle everyday tasks that would otherwise require installing dedicated desktop software or subscribing to a paid service. Open the page, use the tool, and close it — there is nothing to set up and nothing to maintain.

It works on any modern device — Windows PC, Mac, iPhone, Android phone or tablet — because it runs entirely in your web browser. That also means there is no version to update, no compatibility issues between operating systems, and no licence to renew.

✅ Key Features

Runs entirely in your browser — no PDF is ever sent to a server
No watermarks added to output files
Supports all standard PDF versions
Free to use — no sign-up, no usage limits, no subscriptions

💼 When to Use This Tool

Combining reports from multiple team members into one document
Splitting a large scanned archive into individual pages
Preparing PDFs for regulatory submission or client delivery
Reducing file size before emailing or uploading to a portal

🔒 Your Privacy — Your PDF files are processed using pdf-lib, a JavaScript PDF library that runs entirely in your browser. No file data is transmitted to any server at any point. Smart2Office does not track what you process, and we do not store any output files. What you create belongs entirely to you.

📦 Compress PDF