Compress PDF

Compressing a PDF to 100KB or smaller is a common requirement when uploading to portals with strict file size limits, such as government forms, university application systems, or HR platforms. The "Small file" setting applies maximum compression to bring PDF file sizes as low as possible.

The primary lever for aggressive compression is image downsampling. When you compress to the smallest profile, embedded images are reduced to 72 DPI — the resolution used for screen display. If your PDF contains high-resolution photographs or diagrams, you should see significant size reduction.

For text-only PDFs, the size reduction will be more modest because text is already stored compactly. If your document is still too large after compression, the most effective next step is to use the Split PDF tool to remove pages you do not need, then compress the shorter document.

To reach the smallest possible output, select "Small file" in the compression options. For documents where some image quality must be preserved but size still matters, try "Balanced" first. All compression uses Ghostscript on the server — there is no client-side processing.