This app rewrites your files. That deserves a page rather than a sentence.
Suffix contains no network code at all. Conversion uses only what ships with macOS — ImageIO, PDFKit, AVFoundation and Vision.
There is no account, no service, and nothing to sign in to. Do not take that on faith:
git clone https://github.com/PewPewBiches/Suffix.git
cd Suffix && ./Scripts/build-app.sh| Item | Count |
|---|---|
| Network requests | none |
| Telemetry, analytics | none |
| Accounts | none |
| Bundled binaries | none |
| Source published | all of it, MIT |
Not on files you copy, download or move. Only when you change a file's extension yourself, to something suffix can produce, and the contents do not already match.
Photos libraries, Photo Booth, Music, iMovie and Final Cut libraries, application bundles, caches, node_modules, .git, and the Trash. A Photos library is a database, not loose files — rewriting anything inside would corrupt it.
Before anything is overwritten the original is copied aside and kept for seven days, so any conversion can be undone from the menu bar. Stored originals expire on their own rather than growing forever.
Because it is unsigned.
Gatekeeper blocks the first launch and says the app “cannot be verified”. That is a statement about the missing signature, not about what the app does. Open System Settings → Privacy & Security and click Open Anyway; you do it once.
The same gap means suffix cannot use Notification Center — macOS refuses authorization without a signing identity — so it draws its own notice instead.
Full Disk Access, so it can reach Desktop, Documents and Downloads.
Without it suffix keeps running and silently does nothing in exactly the folders you use most — which is worse than failing, because it looks like it is working.
A silent, healthy-looking failure is this app's characteristic way of going wrong. Setup ends in a test it button that converts a real file and shows you the result — it catches the problem while you are still paying attention, instead of three days later.
The keyboard shortcut additionally asks Finder what you have selected, which macOS prompts for separately. Declining costs you the shortcut and nothing else — right-click still works.
Converts files when you rename them.
Built for macOS 14 and later. Free, MIT licensed.
The Trash contains 1 item: nine-step-png-to-pdf-workflow.txt
Close a window with its top-left box and it lands here. Unlike the other thing in there, it can come back out.