HotConvertPDF — Portable Document Format
DocumentPDF compression re-samples embedded images, removes redundant streams, and subsets fonts to produce a much smaller document without altering its layout or typography. Reducing a PDF can cut its size by 50–90%, making it practical to email multi-page reports, share scanned forms, or archive legal documents.
✓Common use cases
- ›Shrinking scanned PDF invoices and contracts for email attachments
- ›Reducing multi-page report sizes before uploading to a client portal
- ›Compressing eBook PDFs for faster download from a website
- ›Optimizing PDF presentations for online conference sharing
★Advantages
- ›Dramatic size reduction (50–90%) while preserving layout and fonts
- ›Selectable quality levels from screen-resolution to print-ready
- ›Handles scanned PDFs by recompressing embedded page images
- ›Maintains clickable links, bookmarks, and form fields
⚙Technical details
PDF compression targets multiple resources: embedded JPEG/PNG images are re-encoded at lower quality; duplicate objects and streams are deduplicated; unused fonts and resources are removed; and cross-reference tables are rebuilt. Ghostscript presets range from /screen (72 dpi) to /prepress (300 dpi).
Compress your PDF file
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Max file size: 100 MB · Your file is processed securely and deleted after compression.
Frequently asked questions
Does compressing PDF reduce quality?
PDF compression reduces embedded image resolution and removes redundant streams, which can slightly soften images inside the document. Text and vector elements remain perfectly sharp. Use the "high quality" preset if the PDF contains important graphics.
How much can I reduce a PDF file?
PDF files can typically be reduced by up to 90% depending on the source content and the compression level you select. Files with lots of detail compress less than simpler content.
Is my PDF file safe when I compress it?
Yes. Your file is uploaded over an encrypted HTTPS connection, processed on our secure servers, and permanently deleted immediately after you download the compressed output. We never store or share your files.
What tool is used to compress PDF files?
We use Ghostscript — a battle-tested, open-source compression engine trusted by developers worldwide — to process PDF files reliably and efficiently.