Split Large PDF into Smaller Files
Break oversized PDFs into manageable, smaller files that fit email limits, upload portals, and sharing platforms. Split by page ranges to create parts that work everywhere — fast, free, and browser-based.
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Supported format: .pdf
Got a PDF that is too large to email, upload, or share? OmnisPDF lets you split it into smaller files by selecting page ranges. For example, split a 20-page PDF into four 5-page files — each small enough to attach to an email or upload to a portal with strict size limits.
- ✓ Split oversized PDFs into email-friendly parts
- ✓ Create equal-sized sections by dividing page ranges
- ✓ Original quality preserved — no recompression
- ✓ Works on Mac, Windows, iOS, Android, and Linux
- ✓ No installation — split PDFs directly in your browser
Split PDFs for Email Attachments
Most email providers cap attachments at 25MB. If your PDF exceeds that, split it into smaller parts by page range and send each part in a separate email. Combine with OmnisPDF's compression tools for even smaller files.
Meet Upload Portal Size Limits
Government portals, job applications, and university submissions often enforce strict file size limits — 5MB, 10MB, or 20MB. Split your PDF into sections that fit within those limits, then upload each part separately.
Share Large Documents in Parts
Need to share a 100-page report via messaging apps or cloud links? Split it into logical sections — introduction, data, appendix — so recipients can download and read the parts they need without waiting for the full file.
How to Split a Large PDF into Smaller Files
Upload or drag and drop your large PDF into OmnisPDF.
Enter page ranges to create equal-sized parts (e.g. 1-5, 6-10, 11-15, 16-20).
Click Split PDF to break your file into separate parts.
Download each smaller PDF and email, upload, or share them individually.
Frequently Asked Questions
How do I split a large PDF into smaller files?
Upload your PDF to OmnisPDF and enter page ranges to divide it into equal parts. For example, split a 20-page PDF into four 5-page files by entering ranges 1-5, 6-10, 11-15, and 16-20. Download each part separately.
Can I split a PDF to fit email attachment limits?
Yes. Most email providers limit attachments to 25MB. Split your large PDF into smaller parts by page range, then attach each part to separate emails or compress each part further with OmnisPDF's Compress for Email tool.
How small can the split parts be?
Each part can be as small as a single page. The file size of each part depends on the content — pages with images will be larger than text-only pages.
Will splitting a PDF reduce the quality?
No. Splitting only separates pages into different files. The content, images, and formatting stay exactly the same as the original document.
Can I split a PDF for upload portals with file size limits?
Yes. Many portals have 5MB or 10MB limits. Split your PDF into smaller sections, then use OmnisPDF's compression tools on each part to ensure they meet the size requirement.
Can I recombine the split files later?
Absolutely. Use OmnisPDF's Merge PDF tool to combine split files back into a single document whenever you need the full version again.