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Compress PDFs for Different Destinations

Email, chat apps, portals and cloud storage each handle PDFs differently. Here's how to fit them.

Where you're sending a PDF changes what "small enough" means. An email provider, a job-application portal, a messaging app and a cloud-storage link all enforce different limits — and some don't limit size so much as how the file is shared. This cluster matches the destination to a sensible mode so you're not compressing blind.

A useful habit: find the destination's real rule before you compress. A portal usually states its per-file cap right on the upload screen; a mail provider's limit is "typical and may vary" by account. Sizing to the actual rule saves you from over-compressing a file that already fit, and from under-compressing one that was always going to bounce.

When a readable file cannot fit, check whether the destination accepts separate parts or an approved sharing link. Link delivery has its own storage, permissions, expiry and access rules; it does not remove every size or policy constraint. Use the workflow the recipient actually permits.

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
Email attachment	Email	Balanced for typical inboxes; step down to a numbered target if it bounces.
Upload portal with a stated cap	Under 10MB	Match the portal's number — 10MB clears many forms; drop to 5MB only if required.
Messaging or chat app	Under 10MB	Chat apps often re-compress or cap files, so a smaller target uploads more reliably.
Cloud storage or a shared link	High Quality	If a link is accepted, check storage limits, recipient permissions and expiry. Keep the original when transformation is unnecessary.
Sending something sensitive	Remove metadata	Strips metadata and keeps processing on your device; see the Privacy cluster.

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Frequently Asked Questions

Why does the same PDF work in one app but not another?

Each platform sets its own limit, and some count the whole message or re-compress uploads. Size for the strictest destination, or share a link to sidestep the limit.

Is a shared link better than an attachment?

A link can deliver the original when an attachment will not fit, if the recipient accepts it. Check storage rules, access permissions and expiry; link delivery has its own constraints.

Do attachment limits apply to the file or the whole message?

Email limits usually cover all attachments combined; portals usually cap each file. Check which one applies before you decide how hard to compress.

Put the advice to work.

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

Start compressing