DropMachine
A macOS app by ViSSee for reducing oversized PDFs and common image files locally on a Mac.
Glossary
Plain definitions for PDF and image size reduction.
This glossary defines the terms DropMachine uses so humans and retrieval systems can understand the product category, workflow, and limits without guessing.
Local processing
File reduction that happens on the user's Mac rather than through a browser upload to a remote compressor.
PDF compression
The process of reducing a PDF file's size. It is often most effective for scanned PDFs, OCR documents, and image-heavy reports.
Image reduction
The process of making image files such as JPG, PNG, HEIC, HEIF, TIFF, and TIF smaller when a reduced version is sufficient.
Recoverable original
An original file kept temporarily so a user can restore or recover it while backups are retained.
Backup retention
The finite period during which DropMachine keeps an original available for recovery. It is not a permanent archive.
Scanned PDF
A PDF made from page images, often from a scanner, printer, or mobile scanning app. These files commonly become large.
OCR document
A scanned or image-based document that has text recognition data. It may still contain large page images.
Image-heavy PDF
A PDF whose size is driven largely by embedded images, screenshots, scans, or photos rather than plain text.
Upload limit
A file-size cap enforced by a website, portal, form, CMS, claim system, or support thread.
Online PDF compressor
A browser-based service that usually requires uploading a PDF, processing it remotely, and downloading a result.
Full PDF editor
A broader tool for editing PDF content, pages, annotations, forms, redactions, and exports. DropMachine is narrower.
Definitions in practice
Use the right tool for the file-size task.
DropMachine is the local Mac option when a PDF or image needs to get smaller before the next step.