Split Large PDF into Smaller Files
Break oversized PDFs into smaller, more manageable files. Perfect for emailing large documents, meeting upload limits, or splitting textbooks into chapters.
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Supported format: .pdf
Large PDFs — 100+ page reports, oversized scans, textbooks, and manuals — are difficult to email, upload, and share. OmnisPDF splits them into smaller files by page range or individual pages, so each part fits within size limits and is easy to handle.
- ✓ Split PDFs with 100+ pages into manageable parts
- ✓ Choose custom page ranges or split evenly
- ✓ No quality loss — pages are extracted, not re-encoded
- ✓ Works on Mac, Windows, iOS, Android, and Linux
- ✓ No installation — split PDFs directly in your browser
Split Large PDFs for Email Attachments
Most email providers limit attachments to 25MB. If your PDF is too large to attach, split it into smaller parts and send each one separately. Combine with OmnisPDF's compression tool for even smaller files.
Break Up Files for Upload Portals
Government portals, HR systems, and submission platforms often have strict file size limits. Split your oversized PDF into parts that meet the portal's requirements — no content is lost, and each part retains full quality.
Split Textbooks, Manuals, and Long Reports
Working with a 500-page textbook or a lengthy compliance manual? Split it into chapters or sections for easier reading, sharing with team members, or printing specific parts without handling the entire document.
How to Split a Large PDF
Upload or drag and drop your large PDF into OmnisPDF.
Choose your split method — by page range, individual pages, or equal parts.
Click Split PDF and download your smaller files.
Frequently Asked Questions
What is the maximum file size I can split with OmnisPDF?
Free users can split PDFs up to 25MB. Pro users can split files up to 200MB — perfect for oversized scans, textbooks, and large reports.
How many parts can I split a PDF into?
You can split a PDF into as many parts as you need — by page range, individual pages, or evenly divided sections. There is no limit on the number of output files.
Does splitting a PDF reduce the quality?
No. Splitting extracts pages from the original PDF without re-encoding. Text, images, and formatting remain exactly as they were in the original file.
Can I split a 100+ page PDF into smaller chapters?
Yes. Use page ranges to split a large document into chapters or sections. For example, split pages 1-25, 26-50, and 51-100 into three separate files.
Can I split a large PDF on my phone?
Yes. OmnisPDF works in mobile browsers — upload, split, and download on iPhone or Android. No app installation required.
How do I split a PDF to send by email?
Upload your large PDF, split it into smaller parts that fit under your email provider's attachment limit (usually 25MB), and attach each part to your email. You can also compress each part after splitting for even smaller files.