Every PDF and image, smaller — on your Mac. Compress to a target size, merge, split, extract and OCR. Nothing leaves your machine.
Drag in a PNG, JPEG, HEIC, TIFF or PDF — or a whole folder. Slimr handles single files and recurses through entire folders in one go.
Compress to Email 10 MB, Web 1 MB or Small 2 MB. Or merge, split and extract pages, or OCR a scan into a searchable PDF.
Folders are written to a mirror named "<name> — Slimr" beside the original. Your source files are never modified, ever.
Squeeze PNG, JPEG, HEIC, TIFF and PDFs down to a size you choose — presets for Email (10 MB), Web (1 MB) and Small (2 MB), or your own number. Drop a whole folder and Slimr compresses everything inside recursively into a mirror folder named “<name> — Slimr”, never touching your originals.
Merge several PDFs into one, split a document every N pages, or extract any page range into a new file. Fast, precise and entirely local — no upload, no watermark, no page limit.
Turn scans and image-only PDFs into fully searchable documents with an invisible text layer, powered by Apple's on-device Vision engine. Select, copy and search the text — the page still looks exactly the same.
Every operation is logged locally: before and after sizes, date, and one click to open the result. No account, no telemetry, no diagnostics — the whole record lives on your machine. One-time purchase.
| Slimr | PDF Squeezer | Smallpdf / iLovePDF | Adobe Acrobat | Preview | |
|---|---|---|---|---|---|
| Compress to a target size | ✓ | ✓ | ✓ | ✓ | ✗ |
| OCR into searchable PDFs | ✓ | ✗ | ✓ | ✓ | ✗ |
| Merge · split · extract pages | ✓ | ✗ | ✓ | ✓ | ~ limited |
| Batch a whole folder recursively | ✓ | ~ files only | ~ web limits | ~ clunky | ✗ |
| Runs on-device — files never leave your Mac | ✓ | ✓ | ✗ cloud | ~ cloud features | ✓ |
| One-time purchase (no subscription) | $19.99 | $7.99 | subscription | subscription | free |
No. All compression, PDF operations and OCR run entirely on your Mac. Your files, images and PDFs are never uploaded anywhere. The only network connections Slimr ever makes are an update check and a one-off licence validation — never your documents. You can confirm this yourself with a firewall tool like Little Snitch or LuLu.
Yes — completely. Once activated, Slimr does everything offline. Compression, merge/split/extract and OCR all use frameworks built into macOS, so you never need a connection to get work done.
No. Slimr is sold directly and is distributed as a Developer ID app, notarized by Apple. That means it can work with whole folders and write results beside your files without the App Store sandbox getting in the way — while still being Gatekeeper-checked and safe to run.
All the Macs you personally own, with a single licence. One purchase covers your whole setup — no per-seat counting.
Images: PNG, JPEG, HEIC and TIFF. Documents: PDF. You can compress any of these to a target size, run PDF merge/split/extract, and OCR images or PDFs into searchable PDFs.
You're in control. Slimr compresses toward the target size you choose and stops there, balancing quality against size. It never up-scales or enlarges a file — if something is already under the target, it's left as-is.
Never. When you compress a folder, Slimr writes the results to a brand-new folder named "<name> — Slimr" right beside the source. Your originals are read but never modified, moved or deleted.
OCR currently recognises Spanish and English text, using Apple's on-device Vision engine. The recognised text is added as an invisible, selectable layer so the page looks unchanged but becomes searchable.
Absolutely — a 14-day money-back guarantee, no questions asked. Payments are handled by Paddle; just reply to your receipt and we'll sort it out.
