Compress a PDF to fit email and upload limits

How PDF compression works here

DocumePro downsamples embedded images, strips redundant fonts and metadata, and rebuilds the file's object streams. Text stays vector-based, so a compressed contract or statement remains selectable, searchable and printable at full quality.

Most scanned documents drop 60-90%: a 25MB scanned bundle typically lands between 2MB and 6MB, comfortably inside the 10MB and 25MB caps used by most email providers and submission portals.

When you need a smaller PDF

Email attachment bounces, government portals with a hard 2MB cap, court e-filing systems, mortgage and lender uploads, and client portals that silently reject anything over 10MB. If you need a guaranteed ceiling, use the dedicated under-2MB compressor.

Why teams use Compress PDF

Compress PDF files online and shrink large documents to email-friendly sizes — typically 40-80% smaller — without making text fuzzy or images unreadable.

The reason people search for a PDF compressor is almost always an upload limit: an email attachment that's bounced, a portal that caps files at 5MB, a court e-filing system that refuses anything over 20MB. DocumePro uses three compression profiles — Email (aggressive, target 1-2MB), Web (balanced, ~50% reduction), and Print (light, keeps full image quality) — so you can match the compression level to where the file is going. The Email profile will get most documents under 5MB; Web is the right choice when the PDF still needs to be readable on a desktop.

Image-heavy PDFs benefit most. Scanned documents shrink dramatically because the embedded images are recompressed with modern algorithms (JPEG 2000 for colour, JBIG2 for black-and-white text) that older PDF generators didn't use. Text-only PDFs change less because text is already extremely compact in PDF format. The compressor never resamples vector content, so charts, diagrams, and signatures stay sharp at any zoom level — only raster images are touched, and the output remains fully searchable and selectable.

Metadata bloat is another common culprit: PDFs exported from accounting software, design tools, or Office often carry redundant XMP metadata, unused embedded fonts, and orphaned objects from edits. The compressor strips all of that automatically without changing visible content. Compressed PDFs stay PDF/A-compatible where the source was PDF/A, useful for archival work.

Two situations account for most compression: an email gateway rejecting an attachment over 10MB or 25MB, and a planning portal or government upload form capping files at 2MB, 5MB or 10MB. Pick a target size and the compressor downsamples images and subsets fonts to hit it while keeping text crisp and vector line drawings sharp — which matters when the file is a site plan, an elevation drawing or a scanned deed a case officer has to read on screen.

Get started

Drag your PDF above and pick a compression profile — your smaller, email-ready PDF will be ready in seconds.

Frequently asked questions

How do I reduce PDF file size without losing quality?

Upload the PDF and pick a compression level. Text and vector content is preserved losslessly; only embedded images are downsampled, which is where nearly all the size in a large PDF sits.

How small can you make my PDF?

Scanned documents usually shrink by 60-90%. If you need a hard ceiling — for example under 2MB for a government portal — use the compress-to-2MB tool, which targets that exact limit.

Is compressing a PDF online secure?

Files are encrypted in transit and at rest, processed in the UK/EU, never used to train AI, and permanently deleted within 60 minutes under our Non-Persistence Guarantee.