PDF Compress
Shrinks PDF file size by lowering image quality or stripping non-visible data. You can compress many PDFs at once.
What it does
Makes heavy PDFs small enough to email, upload or archive. Scanned PDFs can drop to one fifth of their size; vector reports save less.
How to use
- Drag your PDF files into the list.
- Pick a compression profile (default: Office / Email - 150 DPI).
- Optionally enable "Convert to grayscale" or "Strip metadata".
- Click Run.
You get one compressed PDF per input.
Compression profiles
| Profile | Target DPI | Typical saving | When to use |
|---|---|---|---|
| Screen | 72 | 70-90% | Web upload, quick preview |
| Office / Email | 150 | 40-70% | Email attachments, office use (recommended) |
| 300 | 10-30% | Keep print quality | |
| Lossless | - | 5-20% | Only strip redundant data, no visual loss |
Extra options
- Convert to grayscale: Colour pages turn black-and-white. Bigger savings, no way back to colour.
- Strip metadata and bookmarks: Author, creator and page bookmarks are removed. Slightly smaller and more private.
Examples
Emailing a report: Run with Office / Email. Output is about half the size.
Archiving scanned invoices: Screen profile + grayscale. Size drops up to 90%.
Print-quality catalogue: Print profile. Visual fidelity stays, size drops modestly.
Watch out
- Vector or text-only PDFs barely shrink.
- Grayscale is permanent, keep the colour original somewhere safe.
- Encrypted PDFs are skipped; unlock them with PDF Encrypt first.
- Stripping metadata removes "Author" and "Creation date" fields - leave it off if archives need them.
License
Free tier has a monthly compression cap. Office plan removes it.