The document workshop / Email

Compress PDFs for Email

Get a PDF under your provider's attachment limit without guesswork.

An email size error can refer to the combined attachments or to the encoded message. Read the provider or administrator rule before compressing: one PDF may fit on its own while the addition of photos or a spreadsheet pushes the total over the allowance.

Personal Gmail and Yahoo currently publish 25MB totals across attached files; managed accounts and receiving servers can impose different rules. Use the linked email guides for the official sources, and confirm the recipient's actual limit when delivery matters.

MIME encoding can add overhead, but an attachment limit and an encoded message limit are different rules. Do not subtract a third from every provider's advertised allowance. Leave room for other files and check the compose screen; a numbered mode is a best-effort target, not a delivery guarantee.

Match the mode to the task.

Targets are best effort. The final size and warnings are shown with your result.

Choose an approach
Your situation	Mode	What to expect
Standard email, unsure of the limit	Email	Balanced clarity and size for typical inboxes — the right first try for most messages.
Personal Gmail or Yahoo (published 25MB attachment total)	Under 25MB	Gentlest numbered target, in colour. Verify the combined attachment total and leave room for other files.
Corporate mailbox, or it bounced once already	Under 10MB	Use this only when the administrator states a 10MB allowance; it may use grayscale.
Strict portal or an old mail server	Under 5MB	Most aggressive target; resamples images low, so use it only when a hard 5MB rule forces your hand.
Several files in one message	Email	Compress each attachment, or send the big PDF on its own — the limit covers the whole message combined.

Articles & resources.

Read further before choosing your settings.

No specific articles published for this topic yet.

Frequently Asked Questions

What size should I actually aim for?

Use the documented attachment or message limit, account for other files, and leave practical headroom. Encoding overhead is provider-specific; no one number is safe for every mailbox.

My PDF fits but the email still bounces — why?

The limit is almost always for all attachments combined, not each file. Send the PDF in its own message, or compress the other attachments too.

Will the recipient be able to edit the PDF?

A rasterised copy loses live text, links and forms. An original kept unchanged retains those features. Send an approved source copy when editing or text extraction is required.

Put the advice to work.

Mode: Email. Review the result before sharing your file.

Start compressing