Compress PDF for Email
Reduce a PDF so it slips comfortably under your mail provider's attachment limit.
How to use this tool
- 1Add the PDF you want to send by email.
- 2Choose a compression level based on how much smaller it needs to be.
- 3Click Compress and compare the before and after size.
- 4Download the compressed PDF and attach it to your message.
About this tool
Most mail providers cap attachments somewhere between 20MB and 25MB, and many corporate mail servers are stricter still, rejecting anything over 10MB. A handful of scanned pages can easily exceed that. Rather than splitting your document across several emails or moving it to a file-sharing link that the recipient may not be able to open, compressing the PDF keeps everything in one attachment that arrives normally. This tool re-encodes embedded images and removes redundant internal data, typically cutting scanned documents by a large margin while keeping them legible on screen and in print. The compression happens locally in your browser, so contracts, invoices and personal documents are never uploaded. It is free, unlimited and requires no account.
Frequently Asked Questions
What size should I aim for?
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Under 10MB is safe for almost every mail server, including strict corporate ones. Under 25MB works for Gmail and Outlook.
Is the compressed file still a normal PDF?
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Yes. It opens in every standard reader and prints exactly as you would expect.
Can I compress several PDFs at once?
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Merge them first with the Merge PDF Files Free Online tool, then compress the combined document.