About Extract subtitles

Transcribe speech locally with Whisper, review captions alongside the video, and export SRT or VTT.

Tool facts

Processing
Runs locally in your browser. Source files are not uploaded to NanoPix for editing.
Available controls
On-device Whisper WebGPU transcription · Video preview synced with caption cues · Export SRT / VTT
Output
Export SRT / VTT subtitle files

Frequently asked questions

What can Extract subtitles do?
Transcribe speech locally with Whisper, review captions alongside the video, and export SRT or VTT.
Are my files uploaded to your servers?
No. NanoPix runs in your browser with WebAssembly. Your video, audio, or image files stay on your device—we never receive them.
Is browser-based editing private?
Yes. Processing happens locally on your machine. Nothing is sent to NanoPix servers for encoding or storage.
Is this tool free?
Yes. NanoPix tools are free to use in a modern browser. No account is required for basic editing and export.