Compress PDF for WhatsApp
WhatsApp caps documents at 100MB. Compress your PDFs to fit while keeping content sharp. Free, no signup, files auto-deleted in 1 hour.
WhatsApp's document attachment limit is 100MB — generous compared to email, but easy to exceed with scanned documents, photo-heavy PDFs, or long reports. Hitting the limit is one of the more frustrating moments in a chat, especially when you've already typed the message.
PDFOnly compresses your PDF in seconds so you can drop it into WhatsApp without WhatsApp Web or the mobile app rejecting it. For typical 100-300 MB PDFs, the High preset reliably brings them under 100MB. For very large scanned archives, you may need to split the file first (so each piece fits) and send them as a sequence. WhatsApp delivery times also drop dramatically with smaller files — 2 MB sends in seconds, 95 MB takes minutes.
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Frequently asked questions
What's the WhatsApp file size limit?
100MB for documents (PDF, Word, Excel, PowerPoint, etc.). Photos and videos have separate, smaller limits (16MB for videos in most regions). The limit applies to both Web and mobile apps.
Will compressing affect how the PDF looks on the recipient's phone?
Recommended compression is invisible on a phone screen — the small display already limits visible detail. High compression is fine for most documents and gives you the most aggressive size reduction.
Why do PDFs sometimes fail to send on WhatsApp even under 100MB?
Slow connection, weak signal, or temporary WhatsApp server issues. If the file is comfortably under 100MB and still fails, retry on a stable WiFi connection or split the document into smaller pieces.