Free ✂️ Split PDF by Size Free Online — No Sign-Up
Email and upload forms reject oversized PDFs, but cutting pages by hand is guesswork. Choose a PDF, set a maximum size per part — 2 MB by default — and this tool measures every page's real size on your device, then splits the file into parts that fit. Nothing is uploaded, ever.
🔒 Your data never leaves this page
- Splitting runs 100% in your browser — your document is never uploaded to any server.
- No account, no email capture, no tracking of your business or document details.
- Everything is processed on your own device — verify it in the Network tab: no upload happens. Why that matters →
📤 No upload
Your files never leave your device.
🔒 Files stay private
Nothing is stored on any server.
🆓 No sign-up
Use it instantly, free, unlimited.
Split a PDF into smaller files
How it works: the tool measures each page's real size on your device, then groups pages in order so every part stays at or under your target. A single page larger than the target still becomes its own part — pages are never cut in half.
How to use it in 4 steps
- Choose your PDF. Drop it on the page or click to browse. The tool reads the page count and file size on your device.
- Set the maximum size per part. Use 2 MB for most email and portal limits, or type any value from 0.1 MB to 100 MB.
- Press Split by Size. The tool measures each page, groups pages in order under your target, and builds one PDF per part.
- Download the parts. Files download one by one as “part 1 of 3” and so on. If your browser blocks some downloads, allow multiple downloads for this site and try again.
Worked example: a 9 MB scan for a 2 MB portal
A student holds a 9 MB scanned application file, but the portal accepts at most 2 MB per upload. Setting a 2 MB target, the tool measures each page — scanned pages vary, so page counts per part vary too — and produces five parts, each at or under 2 MB, in original page order. The student uploads the five parts in sequence instead of re-scanning or degrading the whole document.
If the whole file only needs shrinking rather than splitting, try our compress PDF to target size tool first, which aims at an exact kilobyte target. And if you want chosen page ranges instead of size limits, the classic split PDF tool does that.
Answer in brief: the facts
Gmail's published attachment limit is 25 MB per message — and many university, visa and job portals set far lower limits, commonly 1 MB to 5 MB per file. That gap is why size-based splitting exists: instead of guessing how many pages fit, this tool measures each page's actual size and groups pages so every part lands under the limit you set.
Why browser-only beats server-upload tools
Server-upload tools receive your full document: your client names, amounts, salaries or CV details sit on somebody else's server, under somebody else's retention policy, even if the page promises deletion. This tool does the opposite — the PDF is assembled or converted by JavaScript running on your own device, so the file never travels anywhere. You can verify that in your browser's Network tab: no upload request appears. For confidential business and personal documents, that difference matters more than any extra feature, and it is why our safety guide recommends browser-only tools for sensitive files.
Straight talk: limits
📄 Pages are never cut in half
Splitting happens between pages only. A single page larger than your target still becomes its own part, slightly over the limit — shrink that page first with compression if a portal is strict.
🖼️ Scanned pages vary in size
One image-heavy page can outweigh ten text pages. Parts therefore hold different page counts; the tool guarantees size, not equal page numbers.
⏳ Large files take a moment
Measuring every page means building each page once before grouping. Very large files (hundreds of pages) may take a minute on slower devices — keep the tab open until the downloads start.
🔒 Encrypted PDFs
Password-protected files may fail to load in the browser. Unlock the file first with the password, then split it here.
Split PDF by Size FAQ
Is splitting a PDF by size really free?
Yes — unlimited splits, any target size, every download, forever. No trial, no watermark on your parts, no account and no payment details, because everything runs in your browser.
Do I need to sign up or give my email?
No. The tool works the moment the page loads. There is no account and no email capture, and your file never leaves your device.
Are my PDFs uploaded to split them?
No. Pages are measured and regrouped entirely in your browser with the pdf-lib library. Your document never leaves your device — verify it in the Network tab.
How is this different from splitting by page range?
Page-range splitting cuts at page numbers you choose. Size splitting cuts at a size limit you choose: it measures real page sizes and groups pages so each part fits, which is what email and portal limits actually require.
What if one page alone is bigger than my target?
That page becomes its own part and stays slightly over the limit, because pages are never cut in half. Compress that page, or the whole file, first if the limit is absolute.
Will the parts keep the original page order?
Yes. Pages are grouped in order from first to last, and parts are named part 1 of 3, part 2 of 3 and so on, so reassembly order is obvious.
What is the smallest and largest target size?
From 0.1 MB to 100 MB. Below 0.1 MB almost every real page would exceed the target alone, so the tool refuses targets at or under zero.
🔒 Your files stay with you
- Processing runs 100% locally in your browser — nothing is uploaded to any server.
- No account, no email, no tracking of your documents.
- GDPR-friendly by design: we never receive your data in the first place.