ORGANIZE PDF
Free Split by Size online
Split PDF into parts with max file size.
Split by Size on DocTools helps you split PDF into parts with max file size, with no account needed. Drop your file into Split by Size, choose your settings, and save the finished file. Split by Size runs locally on your device, so nothing is uploaded to a server.
- Free to use
- No signup
- No uploads
- Works offline
Why use Split by Size
- split PDF into parts with max file size without installing software
- Your file is processed on your device by Split by Size, never uploaded
- Split by Size needs no account, email address or payment details
- Split by Size is batch-friendly: reuse it immediately on the next file
- Split by Size is keyboard accessible and screen-reader friendly
- Split by Size is free forever, with no watermark on the result
Split by Size runs entirely inside your browser. Your file is never uploaded, stored or shared, and nothing is retained once you close the tab.
How to use Split by Size
- Add your file Drag your file onto the drop zone or pick it from your device.
- Adjust the options Set the options that control how Split by Size handles your input.
- Process it Split by Size works instantly on your device, with no queue and no upload wait.
- Download the result Save the finished file straight to your device, then reuse the tool as often as you like.
Benefits
Private by design
Your file stays on your device while Split by Size works. Split by Size never sends it to a server, so confidential work stays confidential.
Instant results
Split by Size finishes most jobs in under a second because the work happens on your own hardware.
No signup, no limits
Use Split by Size as many times as you want. Split by Size asks for no account, adds no watermark and keeps no paid tier gating the output.
Works offline
Once the page has loaded, Split by Size keeps working without a connection, which helps on flights and locked-down networks.
Who it is for
For students
Students use Split by Size to hand in coursework without installing software: split PDF into parts with max file size on a shared or locked-down machine.
For freelancers
Split by Size helps freelancers send client deliverables quickly, since your file never leaves the laptop it was created on.
For HR and admin teams
Split by Size helps HR and admin teams process paperwork quickly, since your file never leaves the laptop it was created on.
How it works
Split by Size loads your file into memory, applies the change you requested to the underlying data rather than to a screenshot of it, and writes a fresh copy for download. Your original stays untouched on disk, and every step of Split by Size happens inside your browser sandbox.
Frequently asked questions
Is Split by Size free to use?
Yes. Split by Size is completely free with no account, no trial and no usage cap. Every feature on this page is available on the first visit.
Does Split by Size upload your file to a server?
No. Split by Size processes your file inside your browser, so it never reaches a DocTools server. That also means the tool keeps working if your connection drops mid-task.
Is there a file size limit?
The practical ceiling is your device's available memory rather than a server quota. Files up to roughly 100 MB work comfortably on a typical laptop in Split by Size.
Do I need to install anything to use Split by Size?
No installation is needed. Split by Size runs in Chrome, Edge, Firefox and Safari, on desktop and on mobile, with no extension or plugin.
Can I use Split by Size on a phone or tablet?
Yes. The Split by Size interface adapts to small screens and supports touch input, though very large jobs are faster on a desktop browser.
What happens to your file when I close the tab?
It is discarded. Split by Size keeps everything in temporary browser memory, so closing the tab removes every trace of the session.
Related tools
- Split PDF | Separate a PDF into individual pages
- Compress PDF | Reduce file size without losing quality
- PDF Page Size Changer | Change pages to A4, Letter and more, content scaled to fit
Last updated: 2026-09-07