editvideo.tools / tools / Auto Subtitles
Tool · AI
Auto Subtitles
Transcribe any video to subtitles with a real Whisper AI model that runs 100% in your browser — free, private, no upload.
Drop a video here
MP4, WebM, MOV, MKV — anything your browser can decode.
PRIVATE BY DESIGN — PRIVATE BY DESIGN — decoding, processing and encoding all run in your browser's engine. No server sees your file.
How to Add Subtitles to a Video
Drop your video, pick the spoken language, click transcribe — a Whisper AI model running locally in your browser writes the transcript, and you download the SRT.
Tip: pick the exact language for best accuracy — auto works, but a known language transcribes cleaner.
FAQ
Frequently asked questions
Is Auto Subtitles really free?
Yes — completely free, with no hidden fees, no premium tier and no signup required. The tool runs entirely in your browser.
Do I need to install anything to use Auto Subtitles?
No. Auto Subtitles works directly in your browser. There is no software to install, no app to download and no plugin required.
Is my video uploaded to a server when I use Auto Subtitles?
Never. All processing happens locally on your device. Your file never leaves your computer, which is why there is no upload wait and no privacy risk.
Which video formats does Auto Subtitles support?
It accepts MP4, WebM, MOV and MKV — anything your browser can decode. Output is MP4 by default, playable on any device.
What happens to my file after processing?
Nothing is stored anywhere. Once you close the tab, everything is gone. We have no server, no storage and no access to your files.
Will my video have a watermark?
No — every download is 100% watermark-free. EditVideo never adds logos, branding or watermarks to your files.
Is this really AI — and is my video uploaded anywhere?
Yes — a real Whisper speech-recognition model (a genuine neural network) runs directly in your browser via WebAssembly. Your file never leaves your device: no server, no upload, no API.
Which languages are supported?
14 languages plus auto-detection: English, Chinese, Japanese, Korean, Spanish, Portuguese, French, German, Russian, Arabic, Hindi, Thai, Vietnamese and Indonesian.
How accurate is it?
Very good on clear speech. We run the compact Whisper-tiny model so it fits entirely in your browser — on clean audio it's reliably accurate; heavy background noise, crosstalk or strong accents may reduce quality.