Reduce PDF File Size Online — Free
Shrink any PDF right in your browser. No account, no uploads, no catches.
Drag & drop files here
or browse to choose
100% private — files are processed in your browser and never uploaded.
How to Reduce PDF File Size Online
- 1
Open and drop
Drag your PDF into the tool. No signup, no email, no captcha.
- 2
Let it compress
The tool processes your file using your browser's computing power. Nothing gets uploaded anywhere.
- 3
Download the smaller file
Your compressed PDF is ready. The original file size and new size are shown so you can see the difference.
Why Browser-Based Beats Server-Based
Most online PDF tools upload your file to their servers, process it, and send it back. That means your tax returns, medical records, and legal contracts sit on someone else's computer. This tool never sends your file anywhere — it runs entirely in your browser using WebAssembly.
The tradeoff used to be speed. Server-based tools had more processing power. But modern browsers running WASM are fast enough that you won't notice a difference for typical documents. A 20-page PDF compresses in a few seconds.
Free also means free. No "compress 2 files then pay" limits. No watermarks stamped on your output. No email signup to unlock basic features. The tool works the same whether it's your first file or your hundredth.
Frequently Asked Questions
Is this really free with no limits?
The free tier handles files up to 100MB with no daily cap on number of files. There are no watermarks added to output files.
How is this different from Adobe's online compressor?
Adobe's tool uploads your file to their servers and limits free users to a handful of compressions. This tool processes locally with no upload and no usage cap.
Does it work offline?
Once the page loads, the compression engine is cached in your browser. It works without an internet connection after that initial load.