How Vidmini works
Your files stay on your device
When you pick a file, your browser reads it directly from your disk. All processing (decoding, editing, encoding) happens in a background thread of the page, using the WebCodecs API built into your browser and, for a few formats, small WebAssembly encoders. The result is written to your browser's private storage and handed back to you as a download. At no point is the file sent over the network.
Check it yourself
- Airplane-mode test: open a tool, then turn off Wi-Fi or mobile data. Tools keep working, because nothing needs the network.
- Open your browser's developer tools, "Network" tab, then process a file: you will see no upload request.
- Our Content Security Policy only allows the page to connect back to vidmini.com itself, for loading the page's own code. The browser blocks any other destination.
AI that runs on your device
Automatic subtitles use OpenAI's open-source Whisper model. The first time you use it, the model (68 to 102 MB) is downloaded from vidmini.com and kept in your browser's cache; the speech recognition then runs on your device. Your audio is never uploaded, and there are no credits or quotas.
What we collect
No account, no cookies for tracking, no advertising trackers. The only cookie we may set remembers the language you picked. Results are kept in your browser's private storage only while you use them and are cleaned up automatically.
Why some tools are instant
A video file is a container (MP4, MOV, WebM…) holding compressed streams. When the target format can hold the same streams, as when trimming, muting or turning a MOV into an MP4 that already uses H.264, Vidmini copies them without re-encoding. That is lossless and takes seconds, even for large files. Other operations (compression, resizing, GIFs) must re-encode, which uses your device's hardware encoder when available.
Limits
We don't impose a size limit. What your device can handle depends on its memory, storage and browser: desktop Chrome and Edge handle multi-gigabyte files; phones are more limited. Older formats such as AVI, WMV or FLV are first converted on your device by a WebAssembly build of FFmpeg, downloaded once (32 MB) from vidmini.com; this fallback accepts files up to 1 GB.