Free PDF Compressor

Free PDF compressor.

Shrink any PDF file for free. No upload, no watermarks, no hidden limits. Just open, compress, download — all inside your browser.

Compress PDF freeConvert PDF →

No account needed · zero uploads, verifiable in DevTools

—100% free — 5 uses per day
—No watermarks added
—No account or email required
—Quality slider for fine control
—In-browser — nothing uploaded
—Supports large PDFs
privapdf.net/convert● SecurePDFcontract.pdf2.4 MBWASMYour browserlocalDOCXcontract.docx1.9 MBConverted in 1.8 s0 bytes sent to any server↓SaveNO SERVER

Don't trust us.
Verify it yourself.

Open DevTools → Network while converting. You'll see zero outbound requests. Every byte stays inside your browser tab.

—Works offline — no internet connection required
—Nothing is uploaded — ever
—Designed for sensitive documents
ZERO OUTBOUND CALLS
ElementsConsoleNetworkSources
FilterAll · XHR · JS · Wasm
NameStatusTypeSize
converter.worker.js200script48 kB
pdf.worker.wasm200wasm312 kB
✓ No requests to external servers
Powered byWebAssembly·Web Workers·pdf-lib·mammoth.js·Service WorkerAll open source · auditable in DevTools

Common questions

Is it really free?

Yes. You get 5 free tool uses per day. No account or credit card required.

Will there be a watermark on my compressed PDF?

No. PrivaPDF never adds watermarks to your files, even on the free tier.

Is my file uploaded to a server?

No. All processing happens entirely in your browser using WebAssembly. Your file never leaves your device.

Does this work offline?

Yes. Once the page is loaded, you can disconnect from the internet and the tool will still work perfectly.

Related tools

Compress PDF < 100KB →Reduce PDF Size →Secure Offline PDF Compressor →Merge PDF →Compress PDF →PDF to Word →