Compress PDF for Email

Shrink any PDF to fit under email attachment limits — Gmail (25 MB), Outlook (20 MB), corporate (often 10 MB). Set the target and download.

Use this tool
PDF Compressor
Compress PDFs to your desired maximum file size.
Open PDF Compressor →

Why this matters

Most email systems reject attachments over 25 MB. Scanned PDFs, presentations with photos, and contract scans routinely exceed that. Compressing before sending avoids the dreaded "attachment too large" bounce.

Step by step

  1. 1
    Open the PDF compressor
    Drop your PDF in.
  2. 2
    Set the target size
    Choose 25 MB for Gmail/Yahoo, 20 MB for Outlook, 10 MB for safe corporate inboxes.
  3. 3
    Compress
    The compressor reduces image quality and removes redundant data until the target is hit.
  4. 4
    Download
    Save the compressed PDF.
  5. 5
    Send
    Attach to your email.

Frequently asked questions

What is the max email attachment size?

Gmail: 25 MB. Outlook: 20 MB. Yahoo: 25 MB. Most corporate accounts: 10–25 MB.

How small can a PDF get?

Scanned PDFs typically compress 70–90%. Text-only PDFs already lean and may only shrink 10–30%.

Will compression affect signatures or form fields?

No — the PDF structure is preserved. Only embedded image quality is reduced.

Is the PDF uploaded to a server?

No. The PDF stays in your browser; compression runs locally with pdf-lib.

What if my PDF is over 100 MB?

Set a 10 MB target and the compressor will aggressively recompress all embedded images.

Can I password-protect the compressed PDF?

Not in this tool — but the compressed PDF works fine with any external PDF password tool.

Try PDF Compressor now
Free, private, no signup. Runs in your browser.
Open PDF Compressor →

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