Compress PDF for Email

To make a PDF small enough for email, compress it with SlimPDF to under 10MB, which fits almost any inbox, including Gmail and Outlook's 20–25MB limits. Pick a target size, download, and attach. It's free for up to 20 files, and nothing is uploaded.

Make PDFs small enough to email. Fit Gmail and Outlook attachment limits without uploading your file anywhere.

✓ 100% Free🔒 Private, in-browserKeeps quality

Choose PDF filesor drag & drop · up to 20 files per job (free)🔒 Compressed on your device. Nothing is uploaded.

Compression level

Good balance · target size takes priority

Target size

Convert pages to images (maximum compression for scans; text will no longer be selectable or searchable)

Gmail and Outlook limit attachments to about 20–25MB, and many company mail servers bounce files much smaller. Compress your PDF here so it sends the first time, instead of fighting with shared links.

Tips

Sending to a corporate address? Aim for 5–10MB to be safe.
Several files? Compress up to 20 at once and attach the results.
Recipients on mobile appreciate smaller files too.

Frequently asked questions

What size should I aim for?

Under 10MB is safe for almost any inbox.

Can I compress several PDFs?

Up to 20 files at once for free; unlimited is $2.99 for 24 hours.

More: Compress PDF · Compress PDF to 1MB · Compress PDF to 500KB · Compress PDF to 200KB