--- title: Free Tool to Split a PDF by Size – Parts Small Enough for E-mail (10 MB) | HelpRange url: https://www.helprange.com/tools/split-pdf-by-size --- Free tool # Split a PDF by file size Too big to attach? Split the PDF into parts of at most 10 MB each (or 5, 20, 25 MB) – pages in order, every part a normal PDF. [Do this for your team](https://www.helprange.com/feature-secure-documents-sharing) ## How it works ### Pick the largest part size 10 MB is preselected – it fits almost every mail server. ### Drop the PDF The split starts by itself and keeps the pages in order. ### Download the ZIP Part 1 of 4, part 2 of 4… each a complete PDF with its page range in the name. ![Split PDF by size: a 46 MB PDF split into five parts under 10 MB](/static/images/ui/tools/split-pdf-by-size.jpg)Split PDF by size: a 46 MB PDF split into five parts under 10 MB ### Too big for e-mail? Send a link instead Share any size of PDF, video or Office file as a HelpRange link: it opens instantly in the browser, you get an alert when it is read and can revoke access later. [Try HelpRange free](https://www.helprange.com/?from=tool-cta#signUpSection) [Compare plans – from $39 per team](https://www.helprange.com/pricing?from=tool-cta) [Share large files](https://www.helprange.com/feature-share-any-file) Most mail servers refuse attachments above 10–25 MB. Splitting a scanned contract, a deck with photos or a construction report into parts by size gets it through without losing quality – each part is a complete PDF with consecutive pages. Choose the size before you drop the file. ## Attachment limits of common e-mail services - Gmail: 25 MB per e-mail (attachments are encoded, so ~18 MB of files is the safe maximum per message). - Outlook.com: 20 MB; Microsoft 365 company mail: often 10–25 MB, set by the administrator. - Many company and government servers: 10 MB or less. Send one part per e-mail. Each part is measured after it is written, so it really is under the limit. ## Smaller instead of more parts Scans and photo-heavy PDFs often shrink by 50–90% with [Compress PDF](https://www.helprange.com/tools/compress-pdf) – try that first. Or skip attachments altogether: [send the PDF as a link](https://www.helprange.com/tools/send-pdf-link) and see when it is opened. ## Example: a scanned tender document A 46 MB scanned tender has to reach a public office whose mail server takes 10 MB. Keep 10 MB, drop the PDF and you get five parts named like tender-part-1-of-5-pages-1-24.pdf. Send them in five e-mails, numbered in the subject line, so the office can put them back together in the right order. FAQ ## Split a PDF by file size – questions Which size should I choose? 10 MB fits most e-mail systems safely; 20–25 MB fits Gmail and Outlook.com (25 and 20 MB); 5 MB for strict company mail servers. What if one page is larger than the limit? That page becomes a part on its own, and the result tells you which page it was – compress the PDF first to make it smaller. Do you keep my file? Only for a short time: uploads are deleted right after processing, the result after 30 minutes – or at once with “Delete now”. Are the pages kept in order? Yes – part 1 has the first pages, part 2 continues where part 1 ended, and every file name shows its page range. Related free tools [Compress a PDF](https://www.helprange.com/tools/compress-pdf)[Split a PDF](https://www.helprange.com/tools/split-pdf)[Merge PDF files](https://www.helprange.com/tools/merge-pdf)[Send a PDF and see when it is read](https://www.helprange.com/tools/send-pdf-link) [All free tools](https://www.helprange.com/tools)