Split a PDF by file size
Cut a heavy PDF into 5/10/25/35 MB chunks (Gmail / M365 / Outlook EAS / iCloud SMTP limits). 100% WebAssembly in-browser, zero upload (GDPR Art. 25). Beats Smallpdf $12/mo, Adobe $19.…
Upload your PDF
Drag your file into the upload zone, or browse from your disk.
1-click action
The tool processes your PDF instantly, locally whenever possible.
Download the result
Get your processed PDF, share by email or save to cloud storage.
Why choose iFillPDF
Custom size
5 MB (Gmail attachment cap), 10 MB (Microsoft 365 default per Exchange Online limits), 25 MB (Outlook Exchange ActiveSync), 35 MB (Apple iCloud Mail), or any custom KB/MB value — auto-rounds to whole-page boundaries so no page is…
Pages stay intact
Cuts are made between pages — no page is split in two.
Sequential output
Chunks numbered file_part1.pdf, file_part2.pdf, etc.
Local processing
Files never leave your computer — processed in your browser.
Cut a heavy PDF into chunks of a chosen size (5 MB Gmail-safe, 10 MB Microsoft 365 default, 25 MB Outlook EAS, 35 MB Apple iCloud Mail) — perfect for email attachments with tight RFC 5322 + RFC 1870 SMTP-EXT SIZE limits. Runs locally via WebAssembly + pdf-lib in your browser, zero upload (GDPR Art. 25 data-minimization), no Smallpdf $12/mo, no Adobe $19.99/mo.
Go further with lifetime access
E-signature proof log, business templates, no watermark. $8.99, one payment, for life — no subscription.
Frequently asked questions
Is it really free?+
Yes — 100% free and unlimited. No account, no credit card; the free version adds a watermark, which a paid plan removes.
Is my data safe?+
Yes — files never leave your computer — processed in your browser. All processing happens locally on your machine.
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