Compress PDF
Optimize PDFs in your browser. No upload, no signup.
Drop PDFs to compress
Optimize PDFs, then download one file or a ZIP for batches.
Up to 25 files ยท 500 MB total
Files are processed in your browser. No data is uploaded.
Questions
Does Compress PDF upload my file?
No. The PDF is read, optimized, and exported locally in your browser with pdf-lib.
Why did my PDF not get much smaller?
Many PDFs already contain compressed images. This browser tool can reduce structure overhead and unused data, but it cannot guarantee large savings for every file.
Which PDFs may not work?
Encrypted, damaged, or unusual PDFs may not be readable in the browser.
Does Utilumo upload my input?
No. Utilumo has no backend that could receive your input. Where a tool makes a request as part of its function, it goes directly from your browser to the destination you choose, never through Utilumo.
Do I need an account?
No. Utilumo tools are built to work without accounts or sign-in.