Compress PDF for Email

Compress pdf for email is one of the most common PDF tasks we see at RatPDF. Whether you are submitting a form before a deadline or sharing a contract with a client, file size limits appear everywhere. Our PDF Compressor handles the compression; this page explains the workflow end to end.

Typical size limits for this use case

Requirements vary by platform. Always check the current portal FAQ, but these ranges help you plan:

• Email (Gmail) — 25 MB attachment, but keep under 5 MB for mobile recipients
• WhatsApp — 100 MB max, but 1–5 MB sends faster on 4G
• University portals — 200 KB–2 MB per document
• Government e-forms — 100–500 KB common in India
• Job boards / ATS — 2–5 MB résumé PDF recommended

Recommended compression settings

For compress pdf for email, start with Recommended compression. Text résumés and typed forms usually shrink enough without visible quality loss. Scanned certificates need Extreme or pre-scan DPI reduction.

Security considerations

Passport copies, bank statements, and offer letters contain PII. RatPDF transfers files over TLS, processes them in isolated jobs, and deletes uploads after download. We never use document content for advertising or model training.

Before you upload

Remove password protection if you own the file (Unlock PDF). Merge related pages with Merge PDF only after each part is already compressed — merging bloated scans first makes compression harder.

After compression

Open the PDF locally, verify every page, and confirm the file name matches portal rules (some require surname_firstname.pdf). Keep the original uncompressed archive for your records.

Explore related workflows on our Compress PDF hub including device-specific guides and Adobe alternatives.