Why PDFs get too big
PDFs grow heavy for the same reason most of the time: large images. Scans, photos, and design exports embed full-resolution pictures in every page, and email providers (typically 20–25 MB) and web upload forms (often 5–10 MB) both reject them. Compression reduces the size of those embedded images and re-optimizes the PDF’s internal streams, which is usually enough to bring a document back under the limit.
How to compress a PDF step by step
- 1
Open the Compress PDF tool
Go to the FileNova Compress PDF tool.
- 2
Upload your PDF
Drag in the document you want to shrink. Files up to 50 MB are accepted — enough for scanned contracts and image-heavy reports.
- 3
Choose a compression level
Pick Light to stay close to the original quality, Recommended for the usual balance of size and readability, or Maximum for the smallest possible file when the PDF still has to be readable but every megabyte counts.
- 4
Compress and compare
FileNova optimizes the document and shows you the result. Check the preview — especially pages with photos — then download the compressed copy.
What compression changes (and what it never touches)
Compression works on the embedded images and internal streams of the file: photos are re-encoded at a lower quality and capped resolution, and optional metadata is stripped on the stronger levels. Vector text, fonts, and page layout are always kept crisp and readable — a compressed document still selects, searches, and prints its text normally.
If the PDF is still too large
When even Maximum compression is not enough, the document usually needs to be divided rather than squeezed further. Use Split PDF to send the file as two parts, or export the pages you actually need as images with PDF to JPG conversion. And if you are combining several documents, merge them first with Merge PDF and compress once at the end, so every page is optimized exactly once.