PDFTwin

How-to guides ·

Compress PDF for email and upload limits

Gmail blocks attachments over 25 MB. Outlook and corporate gateways often cap lower. Job portals and visa systems sometimes require under 2 MB. This guide walks through realistic compression workflows — inspired by help articles from iLovePDF, Smallpdf, and ihatepdf’s size-target guides.

8 min read

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Step 1 — Measure the problem

Check your PDF size in file properties. If you are 30 MB on a 25 MB email limit, moderate compression may be enough. If you are 80 MB, combine compress + split.

Step 2 — Compress with the right preset

Open Compress PDF and choose medium compression for contracts with photos, or high compression for text-heavy reports. PDFTwin processes on secure servers and discards the file after download — similar retention model to iLovePDF’s two-hour deletion policy, without watermarks.

  • Medium — balance quality and size for client deliverables
  • High — smaller files for portals with strict caps
  • If still too large, split appendices into a second PDF

Step 3 — Split instead of over-compressing

Over-compression blurs scans and charts. Split exhibits or backup tables into separate files. Merge again on the recipient side if needed.

Portal-specific targets

  • Email (Gmail): aim under 20 MB for headroom
  • Government / visa uploads: often 2–5 MB — compress then remove non-essential pages
  • ATS résumé uploads: keep under 1 MB — export a text-focused PDF or compress heavily