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✉️ Email-Ready

Reduce PDF Size for Email

Compress your PDF to pass any email attachment size limit. Select a preset (5MB, 2MB, 1MB) or enter a custom target. Free, instant, browser-only.

✉️ Compress PDF for Email →

Email attachment size limits by provider

Email Provider Attachment Limit Recommended Target
Gmail25MBUnder 5MB
Outlook / Office 36520MBUnder 5MB
Yahoo Mail25MBUnder 5MB
Corporate email servers2–10MB (varies)Under 2MB
Government / HR portals1–5MBUnder 1MB
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Frequently Asked Questions

Gmail allows attachments up to 25MB per email. However, if the total email size exceeds 25MB including other attachments, delivery may fail. Many corporate mail servers impose tighter limits of 5–10MB.
For text-heavy PDFs (invoices, contracts, reports), email-optimised compression is visually identical to the original in print. For photo-heavy PDFs, some quality reduction is expected and visible on close inspection.
Yes. WhatsApp accepts PDFs up to 100MB. Compressing your PDF before sending reduces load time for recipients, especially on mobile connections.
Yes. The output is a standard PDF file compatible with Adobe Reader, Preview (Mac), Chrome, Edge, and all PDF viewers on Android and iOS.
Open the Compress PDF tool, select your target size (1MB or 5MB for most emails), upload the PDF, and click Compress. The binary-search engine finds the optimal quality level automatically.
No. The browser-based compression process decodes the PDF pages into images and rebuilds the file, which does not carry over password protection. If you need an encrypted output, apply password protection after compression using a PDF editor.

Email attachment limits by provider

Email ServiceLimit per attachmentTotal per email
Gmail25MB25MB
Outlook / Hotmail20MB20MB
Yahoo Mail25MB25MB
Corporate servers5–10MB typicalVaries by IT policy

Compress PDF for Email – Avoid Bounced Attachments

Email delivery failure from oversized attachments is one of the most common document-sharing frustrations in professional settings. Gmail technically permits attachments up to 25MB, but it automatically converts any attachment over 25MB to a Google Drive link — meaning the recipient needs a Google account to access it. Most corporate email servers, especially those using Microsoft Exchange or on-premise mail infrastructure, block attachments over 5–10MB at the gateway level. The safest approach is to always compress PDFs to under 5MB — and ideally under 2MB — before attaching them to email.

This tool uses the same binary-search PDF compression engine as the main PDF Compressor, pre-configured to target email-friendly file sizes. Drag in your PDF, let the engine find the optimal quality level, and download a compressed PDF that passes through virtually every mail server's attachment filter.

  • Gmail — Converts to Drive link above 25MB; best practice under 5MB for inline attachment
  • Outlook / Exchange — Many corporate configs block above 5–10MB
  • Yahoo Mail — 25MB limit; same practical advice applies
  • Mobile email clients — Sluggish on 2G/3G for PDFs above 2MB; keep under 1MB for mobile-first recipients

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