Split PDF by Size

Drag it into the drop zone or click to browse (up to 100MB). The panel shows size, pages, and estimated chunks.

Drag the Target Chunk Size slider to your limit in MB — for email, set it a little under 25MB. The chunk table updates live.

Leave it on to avoid an orphan trailing page, or turn it off for strict, even splits.

Click Split PDF Document, then download each chunk or Get ZIP for all of them.

Upload the PDF, drag the Target Chunk Size slider to your limit in MB, and the tool previews the chunks in a table. Click Split PDF Document, then download each part or grab them all as a ZIP. Each chunk is built to stay under the size you set, and it all runs in your browser.

Set the Target Chunk Size a little under your provider's limit — around 20MB works for the common 25MB cap on Gmail and Outlook. Split the file, and each chunk will be small enough to attach. Send them across a few emails, or share the ZIP via a link.

They're close estimates, not exact. A PDF's weight depends on its content — an image-heavy page is far larger than a text page — so the tool aims for your target rather than hitting it to the byte. Set your limit slightly below the hard cap so an image-dense chunk doesn't go over.

Smart Splitting (on by default) adjusts the cut points so you don't end up with an awkward single page as the last chunk. It keeps the output tidy by absorbing a small trailing remainder into the previous chunk. Turn it off if you want strictly mechanical, even splits regardless of page flow.

No. The pages are copied into the chunks exactly as they are — no re-compression or rasterizing — so text stays selectable and images keep their resolution. Splitting only divides the document; it doesn't change how the pages look.

After splitting, click Get ZIP to download every chunk in a single archive, or use the individual download links to grab specific parts. The ZIP keeps the chunks in order, so reassembling or sending them is straightforward.

The tool accepts PDFs up to 100MB. Because everything is processed in your browser, very large files also depend on your device's memory — a big document splits faster on a laptop than on an older phone.

No. The splitting happens entirely in your browser, so the PDF never leaves your device or reaches a server. That's important for large, sensitive documents. Closing the tab clears the file from memory.

Yes. The tool works in any modern browser on iPhone or Android — no app needed. Upload, set the target size, and download the chunks. Large files use more memory, so they're smoother on a laptop than on an older phone.

Yes. Splitting is free, the chunks have no watermark, and there's no account to create. Set your size limit and download the parts — no paywall before the download.

Split by size when your goal is a file-size limit, like email or an upload cap — this tool does that. Split by page when you want specific pages or one file per page, which is the Split PDF tool. Pick based on whether MB or page selection matters.

Not while it's locked. The tool needs to read the document's structure to size and split it, which encryption blocks. Remove the password first with Unlock PDF, then split the unprotected copy.