What this looks like
Email is where PDF size limits are felt most sharply. Attachment caps vary by provider, and once a file is over the limit the message simply will not send — which makes "compress to a size that fits" a more useful instruction than "compress this".
- The mail app refuses to attach the file.
- The message bounces back with an attachment size error.
- The recipient never receives the document.
- The attachment takes an unusually long time to upload.
Why it happens
- A mail provider attachment limit lower than the file size.
- A scanned document stored at image resolution far above what a screen needs.
- A report with embedded photographs.
- A multi-hundred-page document sent in one file.
How to fix it with PDF JustFit
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Note the limit
Find out the attachment limit of your mail provider or the recipient's.
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Send the PDF to PDF JustFit
From Mail, tap Share and choose PDF JustFit — no need to open the app first.
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Enter the target size
For example 2 MB for a typical attachment limit.
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Compress and check
Compare the result to confirm text is still readable.
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Send
Attach the compressed PDF to your email and send it.
Frequently asked questions
How do I compress a PDF for email?
Enter the attachment limit your mail provider allows as the target size in PDF JustFit, compress the document, check the result, and attach the compressed file.
What is a safe target size for an email attachment?
Common attachment limits sit in the single-digit megabyte range. The product description uses 2 MB as its example target size for an email attachment.
Sources
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