Reduce PDF for WhatsApp

Compress PDF for WhatsApp.

WhatsApp limits file attachments to 100 MB. If your PDF is too large to send, compress it here — no upload, no server, done in seconds.

Compress PDF for WhatsAppConvert PDF →

No account needed · zero uploads, verifiable in DevTools

—Target under 100 MB for WhatsApp
—Adjustable quality slider
—No file upload — stays on your device
—Free — no account needed
—Works offline
● SecurePDFcontract.pdf2.4 MBWASMYour browserlocalDOCXcontract.docx1.9 MBConverted in 1.8 s0 bytes sent to any server↓SaveNO SERVER

Fitting a PDF under WhatsApp's 100 MB cap

WhatsApp's document limit is generous compared to email, but scanned multi-page contracts or photo-heavy reports can still exceed it, especially over a mobile connection where the send just fails without much explanation.

Because this compressor runs in your browser rather than uploading to a server first, it's also useful in the exact moment you need it — standing in a spot with a weak signal, trying to shrink a file enough to send before the connection drops.

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 my file uploaded to a server?

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

What is WhatsApp's file size limit?

WhatsApp allows documents up to 100 MB. If your PDF exceeds this, compress it with a quality setting of 60–75 until it fits.

Does this work offline?

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

Is it really free?

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

Related tools

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