📧 Compress PDF for Email

Compress PDF for Email Attachments — Free

PDF too large to send? Reduce your PDF size for Gmail, Outlook, and Yahoo Mail in one click. No signup, no watermark. Works on any device.

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Drop your PDF here — compress it for email
Click to browse · Any PDF size · Free & instant

Files deleted after 2 hours · Encrypted upload · No data stored

Email Attachment Size Limits

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Gmail
25MB total per email. Recommends under 10MB for reliability.
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Outlook
20MB attachment limit. Corporate Outlook often lower (5–10MB).
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Yahoo Mail
25MB per attachment. Shared mailboxes often limited to 10MB.
💡 Tip: Even within the limit, smaller PDFs load faster for recipients and are less likely to be flagged by spam filters. Aim for under 5MB for best deliverability.

Why Is Your PDF So Large?

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High-resolution embedded images
Photos, scanned pages and screenshots inside PDFs are the #1 cause of large file size. A single 300 DPI scanned page can be 500KB–2MB on its own.
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Embedded font files
PDFs embed entire font files (sometimes 2–5MB each) even if only a few characters are used from that font.
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Hidden metadata and layers
Office software, design tools (Illustrator, InDesign) embed editing history, author data, hidden layers and comments that add invisible bulk.
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Uncompressed content streams
Some PDF generators don't apply stream compression, resulting in 3–5× larger files than necessary.

How to Compress PDF for Email in 3 Steps

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1. Upload
Drag your PDF into the box. Supports any PDF — presentations, scanned documents, reports.
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2. Auto-Compress
PDFTash re-encodes images, strips metadata and subsets fonts automatically.
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3. Send!
Download the compressed PDF and attach it to your email. Under the limit every time.

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Frequently Asked Questions — Compress PDF for Email

My email says the PDF attachment is too large — what do I do?

Upload your PDF to PDFTash above. Most PDFs compress by 70–90% in one pass. A 10MB PDF becomes 1–2MB — easily under any email provider's limit.

What is the Gmail attachment size limit?

Gmail allows attachments up to 25MB total per email. However, for reliability, Google recommends keeping attachments under 10MB. Corporate Gmail accounts (Google Workspace) may have lower limits set by the admin.

Will the recipient's PDF look different after compression?

For the vast majority of documents, no. Text is always crisp (it's vector). Images may have marginally lower resolution but look identical on screen and when printed on A4 paper.

Can I compress a PDF on my phone before emailing?

Yes. PDFTash works in any mobile browser — Safari on iPhone, Chrome on Android. Upload, compress, download, and attach to your email app in under a minute.

Should I share a Google Drive link instead of attaching a large PDF?

That works too, but attachments are often preferred in professional settings. If you need an actual attached PDF, compressing with PDFTash is the fastest solution and doesn't require the recipient to have a Google account.