🔒 No server uploads · No watermark

Compress PDF for email

If a PDF is over your email provider's attachment cap, you need to compress it before attaching. DukPdf shrinks PDFs in your browser using a quality preset, so you can fit a file under Gmail's 25MB or Outlook's 20MB limit without installing software. Open the Compress PDF tool and pick a preset.

Open Compress PDF →

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A common scenario

You have a 30MB scanned report you want to email to a client, but Gmail caps attachments at 25MB and Outlook at 20MB. A balanced compression preset typically brings a 30MB scan under 10MB.

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Why privacy matters here

A report often contains financials, strategy, or customer data. DukPdf compresses in your browser, so the document never leaves your device. See how local processing works.

✓ No watermark✓ Works offline✓ Open DevTools to verify

How to compress pdf for email

Open the tool and add your file

Click the link below to open the tool in your browser. Drop in your PDF or click to select it. The file is read locally on your device.

Configure the operation

Pick a quality preset, page range, signature style, or whatever the tool needs. Every option runs in your browser — nothing is sent to a server.

Download the result

Click the action button. The result saves to your device. The original file is unchanged unless the tool explicitly modifies it.

Every step runs in your browser. No server uploads, no waiting.

Compress PDF for email — questions

How small can I make a PDF for email?

Most image-heavy PDFs shrink 50–80% with the maximum preset. Text-only documents shrink less because the text streams are already compact. Pick a preset and the tool shows the new size before you commit.

Will compression ruin the image quality?

Lossless mode keeps every pixel identical. Balanced and maximum modes downsample large images slightly — text stays sharp, photos soften a little. For most email use, balanced is the right tradeoff.

Will the compressed PDF still be under 20MB / 25MB?

Most scanned PDFs do fit under 20MB after balanced compression. For very large originals, the maximum preset usually gets well under 10MB. The tool shows the new size before you save.

Are the files uploaded to a server?

No. Compression runs entirely in your browser. Open DevTools → Network tab and you will see zero upload requests while compressing.

🔒 DukPdf — YOUR FILES NEVER LEAVE YOUR DEVICE

Ready to compress pdf for email? Your files stay yours.

No server uploads. No watermark. Open the tool, drop your file, and download the result.