Compress technical PDFs without unpleasant surprises
Understand rasterization, size targets and the final quality check.
Updated 11 November 2026 · OfflinePDFHub
Know what changes
This compressor renders pages as images and builds a new PDF. It can reduce scanned reports, but it can also remove selectable text, links, forms, layers and vector detail. Keep the source. If those features must survive, request an optimized export from the authoring application.
Choose a realistic target
Start with a balanced setting rather than the smallest possible file. A hundred-page drawing set is unlikely to remain legible at 100 KB. The tool reports actual bytes and whether the target was met; no preset guarantees a specific size.
Inspect the smallest detail
Open the output at the size a recipient will use. Check dimensions, fine linework, notes, stamps, symbols and scanned signatures. A small file that cannot be read fails the task. Use a higher quality option or split the package if necessary.
Check orientation and completeness
Verify rotated pages and the first, middle and last sheet. Compare output page count with the original. Do not replace the master document with the compressed derivative; label it as a distribution copy.