WhatsApp has a 100 MB file size limit for document attachments. Large PDFs — especially scanned documents and photo-heavy reports — often exceed this. Here's how to compress a PDF specifically for WhatsApp sharing.
WhatsApp allows document attachments up to 100 MB. Most text-based PDFs are well within this limit, but scanned documents, architectural drawings, photo portfolios, and multi-page presentation exports can easily exceed it.
Before compressing, check the file size. On iPhone: tap the file in Files app to see its size. On Android: open your file manager and view file properties. If the file is already under 10 MB, no compression is needed.
Open pdfeditor.onl/compress-pdf on your phone or desktop. Upload the PDF. Select Good compression for files between 10–50 MB, or Strong for files over 50 MB. Tap Compress Now.
Tip: For scanned PDFs over 50 MB, use Strong compression — the result is typically 60–85% smaller with minimal visible quality difference on a phone screen.
Download the compressed PDF. Open WhatsApp, go to the chat, tap the attachment icon, select Document, and choose the compressed file.
WhatsApp accepts PDF documents up to 100 MB. Files larger than 100 MB cannot be sent as attachments.
For most scanned PDFs, Good compression produces a result that looks identical on a phone screen. Text remains sharp — only high-resolution images are slightly reduced in quality.
Yes. Open pdfeditor.onl/compress-pdf in Safari (iPhone) or Chrome (Android). No app download required.