AI Subtitle Translation
Translate Whisper-generated subtitles into another language via the loaded WebLLM. Source language auto-detected.
| Mode | Speed | Quality | Best for |
|---|---|---|---|
| WebLLM translate | Fast | Translates an SRT in-browser | Multi-language captions |
Quick start
See all 6 presets
Want this capability inside the main editor with layers, history, and the full AI panel?
How it works
- 1
Add your srt
Drop or select the srt you want to process — it stays on your device.
- 2
Run the model in-browser
AI Subtitle Translation runs instantly with no download — the work happens locally in a worker.
- 3
Download the srt
Preview the result and download the srt. Re-run with different settings anytime.
Common use cases
Why it’s different
100% Private
Every model runs in your browser. Your files never leave your device — nothing is uploaded to a server.
True Alpha Channel
Exports preserve a real straight-alpha transparency channel (PNG / WebP / AVIF), not a baked-on background.
Free Forever
No account, no watermark, no credits. Open the tool and use it.
Works Offline
After the model downloads once it is cached, so the tool keeps working with no connection.
FAQ
Is it uploaded?
No — translation runs via the in-browser LLM; your transcript stays local.
Is it free to use?
Yes — AI Subtitle Translation is completely free. No account, no watermark, no credits, and no usage limits.
Do my files or prompts ever leave my device?
No. Everything runs locally in your browser via WebAssembly/WebGPU — there is no server that receives your files, prompts, or results.
Which browser and hardware do I need?
A modern browser. Chrome and Edge get WebGPU acceleration for the fastest results; Firefox and Safari run via WebAssembly. This tool downloads nothing and runs on any device.
Can I use the results commercially?
Yes. You own everything you create — NSS makes no claim to the images, videos, or text you process or export.
Does it work on mobile?
Yes — it runs on phones and tablets too, since there is no model download.
Where can I see a step-by-step guide?
Yes — there is a full walkthrough at /how-it-works/ai-subtitle-translate.
Ready to try AI Subtitle Translation?
Free, private, no signup — runs right in your browser.