How much smaller will my PDF get?

It depends on the source. PDFs created from images compress dramatically (often 50–80%) because the tool re-encodes embedded images at a chosen quality. Text-only PDFs see smaller gains, mainly from stream cleanup.

Will image quality be affected?

Image-heavy PDFs are re-rendered at the target resolution and JPEG quality you choose. Lower quality means a smaller file but more visible compression artifacts. The default settings keep documents readable for screen use.

Compress PDF – Reduce PDF File Size Online

Compress PDF

Shrink a PDF for email, uploads, or storage. Adjust quality to trade size for fidelity.

Compress a PDF Online

The Compress PDF tool reduces PDF file size so documents fit inside email attachments, government upload portals, and constrained cloud storage tiers.

How compression works here

Each page is rendered into an image at the chosen DPI and re-encoded as JPEG with the selected quality. The new images are assembled into a fresh PDF. This is the same technique used by professional PDF optimizers and is highly effective on scan-heavy documents.

Choosing the right preset

High quality — keeps text crisp, ideal for printing.
Recommended — good balance for screen reading and sharing.
Strong compression — smallest output, best for archival of mostly-image documents.

Note: Because the output is image-based, selectable text and form fields are not preserved. For text-heavy PDFs where searchability matters, prefer presets above 70% quality.

The Compress PDF tool reduces PDF file size so documents fit inside email attachments, government upload portals, and constrained cloud storage tiers.

How compression works here

Choosing the right preset

High quality — keeps text crisp, ideal for printing.
Recommended — good balance for screen reading and sharing.
Strong compression — smallest output, best for archival of mostly-image documents.

Note: Because the output is image-based, selectable text and form fields are not preserved. For text-heavy PDFs where searchability matters, prefer presets above 70% quality.