Compress PDF for WhatsApp — fit the 100 MB chat cap.

WhatsApp caps documents at 100 MB per message (up from the old 16 MB media limit). Telegram lifts that to 2 GB per file (4 GB for Premium), while Signal and iMessage both hold around 100 MB. Facebook Messenger is tighter at roughly 25 MB. This tool targets any of these caps with one click.

Open this page, drop your PDF, pick the 100 MB WhatsApp preset, and let the iterative reducer shrink image data until the file fits. Text stays vector (not rasterized) so it stays searchable inside the chat preview. The compressed PDF downloads straight to your device — no upload.

Yes — text remains crisp because the text layer is never rasterized, so the WhatsApp document preview thumbnail shows clean text. Embedded images are re-encoded at a quality level that avoids visible artifacts at normal reading zoom. For quality-critical files, pair with the lossless compressor.

No. Compression runs entirely in your browser using pdf-lib and the built-in image encoders. DevTools → Network shows zero requests carrying your document. The same local model powers the without-upload compressor, so nothing transits a third-party server.

No. No account, no email capture, no daily limit. Drop a PDF, pick a chat-app target, download. Sign-in only unlocks unrelated AI features (chat with PDF, translate).

Open this page in Safari (iOS) or Chrome (Android). Drop the PDF from your files app, pick the 100 MB preset, and download — the file saves to your phone's Downloads / Files folder and you can share it straight into a WhatsApp chat via the share sheet. No app install required.

WhatsApp measures the uploaded (base64-encoded) size, and a handful of WhatsApp versions or regional server configs enforce slightly stricter caps (often ~95–96 MB). Compress to around 90 MB and you'll land safely under every variant. Leave margin — it's the difference between the message sending and stalling at "Preparing".

Yes — the 100 MB document ceiling applies across all official WhatsApp clients (iOS, Android, Web, Desktop, and KaiOS). Older versions of WhatsApp (< v2.22) still enforce the legacy 16 MB cap for some media types, so if the recipient is on an outdated client, compress under 16 MB or tell them to update.

Telegram is the most generous: 2 GB per file, 4 GB for Premium. iMessage and Signal match WhatsApp at ~100 MB. Facebook Messenger is tightest at ~25 MB. If you're sending to a mixed group, compress to the lowest common denominator — 25 MB covers everyone, 100 MB covers everyone except Messenger.

Yes, with the password. Everything runs in the browser, so your password never leaves the page. Unlock → compress to the chat-app target → optionally re-apply the password before sharing, all locally.

Very image-heavy PDFs hit a floor. Options: (1) switch to Scanned mode if it's a scan, (2) drop non-essential pages, (3) send via Telegram (2 GB cap) instead of WhatsApp, or (4) use an encrypted link — the recipient taps the link in chat and their browser decrypts locally.

Yes. Load the page once online, then switch to airplane mode — compression continues because it runs in-browser, not on a server. Compress during the flight, share to WhatsApp when you land.

Yes. The output is a standard PDF with intact structure, metadata, text layer, and bookmarks. WhatsApp's internal viewer, plus every major reader (Acrobat, Preview, Google Drive Viewer), opens it normally.

Yes — the target is four times larger (100 MB vs Gmail's 25 MB), so compression can be much gentler and image quality stays higher. See compress for email for the tighter 25 MB / 20 MB / 10 MB mail-server targets, or reduce for Gmail specifically.

Yes — drop several files and the tool processes them sequentially, each hitting your chosen size cap. If you want to combine them into one chat message first, merge locally before compressing so the single combined file fits the 100 MB limit.