How to Compress PDF Files Without Losing Quality

Email attachment limits typically cap at 25MB. A poorly-optimised PDF can blow past that with just a few high-resolution images.

Three compression levels

• **High quality** — minor size reduction, perfect for printing.
• **Recommended** — balanced, ideal for sharing online.
• **Maximum compression** — smallest file, screen-only.

Open our Compress PDF tool, pick a level, and download. Most users see 60-80% reduction in seconds.

Pro tips

• Convert to grayscale if colour isn't essential.
• Flatten form fields and annotations.
• Remove unused fonts and metadata.

Sending lots of screenshots? Bundle them first with PNG to PDF, then compress the result for a much smaller attachment.