Compress PDF Online — Free, Private, No Upload
Reduce PDF file size while maintaining readable quality. Works entirely in your browser — your documents never leave your device.
Drop a PDF to compress
PDF files — processed entirely in your browser
How It Works
Upload PDF
Drop or select a PDF file you want to compress.
Set Quality
Adjust the quality slider. Lower quality = smaller file. 70% is recommended for most uses.
Download
The compressed PDF is created in your browser. Download it instantly.
How to compress a PDF online in seconds
Reducing PDF file size used to mean Adobe Acrobat, paid desktop software, or trusting a stranger's server with your documents. With FileWash you open the page in your browser, drop the PDF, set the quality, and download the compressed version. For most documents the entire process takes a few seconds.
The compressor runs directly in your browser — there is no upload to a server. That matters when the file is a contract, an invoice, a bank statement, or anything you would rather not hand to a third party.
Who this free PDF compressor is for
Anyone sending PDFs by email runs into attachment size limits — Gmail caps at 25MB, Outlook around 20MB. Compressing a PDF for free solves that in seconds, without installing anything.
Students, academics, and researchers submitting theses, papers, and journal uploads on platforms with size limits get a quick fix without a paid subscription.
Lawyers, accountants, and consultants working with sensitive documents value that the compression happens locally in the browser. No upload, no cloud storage, no third-party servers in the loop.
Why compress PDFs in the browser instead of uploading?
Most online PDF compressors upload your file to their servers, process it there, and send the compressed version back. That means a document which might contain personal data, account numbers, or confidential information passes through machines you don't control.
FileWash runs the compression entirely in your browser using JavaScript and pdf-lib. The file never leaves your device. No signup, no account, no watermark, no daily limit, no cost. After the page loads you can disconnect from the internet entirely — the compressor keeps working offline.
For sensitive documents that local-processing model gives a privacy guarantee that cloud-based commercial tools simply can't match.
Tips for the best PDF size reduction
The default 70% quality strikes a strong balance between file size and readability for most documents. For text-only documents you can drop the quality to 50% and still get crisply readable text in a much smaller file.
PDFs containing high-resolution photos, scanned pages, or print-quality artwork compress most dramatically — often 50–80% smaller. Already-optimized PDFs and pure-text documents see smaller wins (10–30%).
If the compressed file is still too large, step the quality down a notch at a time. There's no cap on attempts — try different values until you hit the target size.
FileWash vs. other PDF compressors
Compared with iLovePDF, Smallpdf, and Adobe Online, FileWash differs on three things: processing happens on your own device (real privacy, no upload), usage is completely free and unlimited (no daily limits, no subscription), and there's no watermark or quality downgrade applied to the result.
The tool also works without registration, without an email address, and without supplying any personal information. Open the page, compress the file, download — done.