How much smaller will my PDF get after compression?

It depends heavily on the content — image-heavy scans often shrink by 50-90%, while text-only documents shrink only slightly since there are few images to re-encode.

Will compressing my PDF make the text blurry?

No. Compression targets embedded images; selectable text and vector graphics remain sharp at every quality level.

What is the difference between the three compression levels?

Smallest Size prioritizes the lowest possible file size, Balanced is a good default for everyday sharing, and Best Quality keeps images closer to their original resolution for print use.

What is the typical email attachment size limit?

Most providers cap attachments somewhere around 20-25 MB, though exact limits vary by provider.

Which compression setting is best for email?

Balanced is the right default for most email attachments — a substantial size reduction with no meaningfully visible quality loss.

What if my file is still too large after compressing?

Consider splitting the document into parts across two emails, or share a link instead of an attachment.

Compress

Compress PDF for Email

Most email providers cap attachments somewhere between 20 and 25 MB, and a scanned or image-heavy PDF can easily exceed that. Compressing specifically with email in mind means picking a setting that gets comfortably under that limit while keeping the document clearly readable for whoever receives it.

Use the Compress PDF Tool

No registration required
Files deleted automatically
Works in any browser

Why This Matters

What Is a PDF Compression Tool?

A PDF compression tool reduces the file size of a PDF, usually by re-encoding the images embedded inside it and streamlining the document's internal structure, while keeping the number of pages, the text, and the overall layout exactly the same. The result is a file that looks the same to the reader but takes up noticeably less disk space and transfers faster.

Step by Step

How to Compress PDF for Email

Upload Your PDF

Drag in the PDF you want to shrink, or click to browse and select it.

Choose a Compression Level

Pick Smallest Size, Balanced, or Best Quality depending on how the file will be used.

Click Compress PDF

Our server re-encodes the document's images and rewrites its structure, usually within seconds.

Download the Smaller File

Save your compressed PDF — same pages and layout, a fraction of the size.

Recommended Tool: Compress PDF

Reduce file size while preserving visual quality.

Open Compress PDF

Get Better Results

Tips

Match the Preset to the Purpose — Use Smallest Size for quick, informal sharing, and Best Quality when the document is going to professional print.
Don't Compress Twice — Running an already-compressed PDF through compression again rarely reduces size further and can slightly reduce image quality unnecessarily.
The Balanced preset is usually the right choice for email — it cuts file size substantially with no meaningfully visible quality loss on screen.
If a single attachment still exceeds your recipient's limit after compressing, consider splitting the document into two smaller emails instead.

Avoid These

Common Mistakes

Uploading a file that is already password-protected without unlocking it first — most operations require an unencrypted starting file.
Assuming a converted or compressed file replaces the need for the original — keep your source file until you have confirmed the result looks right.
Not checking the 50 MB upload size limit before starting, then wondering why a very large scan fails to upload.
Using the highest-quality compression preset when the goal is actually getting under a strict size limit — Smallest Size or Balanced usually serves email far better.