Caption Translator
What is Caption Trans?
Use AI large language models to translate video subtitles. Especially optimized for Japanese.
Supports: Google Gemini, OpenAI, DeepSeek, and other OpenAI-compatible API services.
Download
Supports macOS (Apple Silicon) and Windows.
Please go to Releases to download.
⚠️ How to open on macOS
- Double-click the app. Since it is not currently signed with an Apple developer certificate, it will be blocked by the system.
- Go to System Settings > Privacy & Security.
- Scroll down and find the blocked app notice in the Security section, then click "Open Anyway".
- After verifying your Mac password, click "Open" in the final popup. (You only need to do this once. After that, you can open it normally by double-clicking.)
App Screenshots
Notes
Transcription is especially optimized for Japanese, and GPU acceleration is supported on both Windows and macOS.
For translation, I recommend the gemini flash lite model. In practice, it is very fast, delivers solid quality, and is relatively affordable. It can also translate some sensitive content.