Privacy Policy
How Undersize handles your data — where your video goes, and what leaves your Mac.
Last updated: August 14, 2026
In short: Your video never leaves your Mac. Undersize collects no personal data, uploads nothing, and has no accounts and no servers.
Scope
This policy explains how the Undersize macOS app and this website handle information. Undersize is made by Andrii Mahda ("I", "me").
Your video files
Everything happens on your Mac. Files you import are read locally, and the converted result is written to the export folder you chose — nothing is uploaded, streamed, or copied anywhere else. Encoding runs through Apple's own video frameworks on your machine's hardware encoder, so no external service is involved at any point.
The app is sandboxed: it can only reach the files and the export folder you pick yourself. Your choice of export folder is remembered between launches as a security-scoped bookmark stored locally; nothing else about your files is retained.
What the app stores
Your settings — the mode, container, codec, resolution ceiling, bitrate or target size, and the export folder — are stored locally on your Mac in the app's own preferences. They never leave the device and are not synced anywhere.
What I collect
Nothing. Undersize contains no analytics, no crash reporting, no advertising, and no third-party SDKs of any kind. This matches the "Data Not Collected" declaration on the app's App Store privacy label.
Network connections
The app makes none of its own. It does not phone home and works identically with your Mac offline. The only network activity involved is the App Store's, when you install or update the app — that is between you and Apple.
This website
The site is served by a third-party static host. Like most websites, the host may keep standard technical request logs (such as IP address, timestamp, and browser type) for security and reliability. I add no analytics, tracking pixels, or advertising cookies.
Your control over your data
Because I hold none of your data, there is nothing for you to request, correct, or delete from me. Removing the app removes its preferences; your videos are yours and stay wherever you put them.
Children
Undersize is not directed at children and collects no personal information from anyone, including children.
Changes
If this policy changes, I'll update this page and the "Last updated" date above. Material changes will be noted in the app's release notes.
Contact
Questions about this policy: [email protected].