Compress PDF Online
Reduce PDF file size on an isolated server using Ghostscript and qpdf. Choose the balance between image quality and a smaller download.
Real PDF processing
Ghostscript recompresses PDF resources, then qpdf validates and linearizes the result for reliable downloads.
Private and short-lived
Processing runs without network access. The source is removed after processing and the result expires automatically.
Never returns a larger file
If recompression would increase the size, Moletools returns the original valid PDF and reports 0% saved.
Frequently asked questions
- Which compression level should I choose?
- Balanced is the best default for sharing. Choose Light for print-quality images, or Strong when file size matters more than image detail.
- Will text remain searchable?
- Normally yes. Existing PDF text and vector content are preserved where possible, while embedded images are the main target for downsampling. Always review important files.
- Are uploaded PDFs stored permanently?
- No. The source is removed after processing and the downloadable result expires automatically after about one hour.