18Docs

Compress a PDF for email

Compress a PDF so it fits under common email attachment limits like 25 MB. Free and private. Tool is being set up.

100% private: this tool runs entirely in your browser. Your file never leaves your device — nothing is uploaded, nothing is stored.

Drop files, paste, or click to browse

Files are processed in your browser — they never leave your device.

Add a file to continue.

Compress a PDF for email

Most email providers cap attachments at around 25 MB (Gmail and Outlook), and corporate mail servers are often stricter at 10 MB, so a heavy PDF full of scans or photos can bounce before it ever sends. Compressing the file shrinks it enough to clear those limits while keeping it readable, which is far easier than splitting it up or hunting for a file-sharing link. The biggest savings come from PDFs built from images — scanned documents, photo-heavy reports — where the embedded pictures can be downsampled significantly with little visible loss at screen and normal print sizes. A text-only PDF is usually already small and will compress less. Aim to get comfortably under your recipient's limit rather than to the absolute minimum, so quality stays high. Your file is processed under our strict privacy promise: encrypted in transit, never logged, and automatically deleted within about an hour.

Frequently asked questions

What size should I aim for to email a PDF?
Under 25 MB suits Gmail and Outlook; aim for under 10 MB for stricter corporate mail servers to be safe.
Will compressing ruin the quality?
For image-heavy PDFs the loss is minor at screen and normal print sizes. Text stays sharp because it is not an image.

More ways to use Compress PDF