Compress PDF — Free

Upload your PDF to ZiaSign, choose a compression level (low, medium, or high), click 'Compress PDF', and download the smaller file. Free, no signup, no watermark.

Typically 40-90% reduction depending on image content. Text-only PDFs see smaller reductions. Image-heavy PDFs can be compressed significantly.

Start with low or medium compression if readability matters most. Text stays crisp at every level, and image-heavy files can usually be reduced substantially before quality loss becomes noticeable.

Yes, often. The final size depends on how many images, pages, and scans are inside the file. For strict limits, try high compression first, then remove unneeded pages or compress a cleaner source file.

Yes. Use the high compression setting to get your PDF under typical email attachment limits (25 MB for Gmail, 20 MB for Outlook).

Yes. ZiaSign works well for submission-style limits where a portal asks for files below 100KB, 200KB, 500KB, or 1MB. If the limit is very strict, try high compression or split unnecessary pages first.

No. ZiaSign never adds watermarks to compressed PDFs. The output is clean and professional.

Anonymous users can upload files up to 25 MB. A free account and paid PDF-tool plans support files up to 100 MB, with a 100 MB combined input limit for one operation.