GrumpToolsVideo
AI speech recognition (Whisper) turns your video or audio into a timestamped transcript you can edit right in the browser, then download in the format you need: plain text, timestamped text, SRT, WebVTT, or JSON.
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Powered by Whisper with voice-activity filtering, so silence and noise don't turn into garbage text.
Every line is editable in place, and clicking a timestamp jumps the built-in player to that moment.
Plain text, text with [mm:ss] timestamps, SRT and WebVTT caption files, or JSON segments with start and end times.
Automatic language detection, or choose from 17 languages including English, Spanish, French, German, Japanese, and Arabic.
Upload MP4, MOV, MP3, WAV and other common formats. The audio track is extracted automatically.
Drag and drop your file and pick the language, or leave it on auto-detect.
The AI transcribes with timestamps; click any line to fix wording, click a time to replay it.
Export plain text, timestamped text, SRT, WebVTT, or JSON, with your edits included.
For clear speech, typically around 90 to 95 percent. Heavy background noise, crosstalk, and strong accents lower accuracy, and you can fix any line in the built-in editor before exporting.
Yes. Export as SRT or WebVTT and upload it to YouTube as a caption track. If you want stylish captions burned into the video itself, use our Auto Subtitles tool.
No. The transcript is a single text stream with timestamps; it does not label who is speaking.
Auto-detection works across Whisper's full range, and you can explicitly select English, Spanish, French, German, Portuguese, Italian, Dutch, Russian, Japanese, Korean, Chinese, Hindi, Arabic, Turkish, Polish, Ukrainian, or Vietnamese.
Free accounts can upload files up to 1 GB per file. Pro raises the limit to 3 GB and Premium to 5 GB. File Transfer has its own, much higher limits: 10 GB per transfer on Pro and 100 GB on Premium.
GrumpTools is in beta and runs on a small amount of hardware, so every limit you see is set to what can genuinely finish rather than to what sounds good. We would rather tell you up front than take your file and fail an hour later. These caps are the first thing we raise as the userbase grows and we add capacity, and paid plans are what fund that, so the limits move up over time instead of down.
Files are processed on our servers and deleted automatically within 24 hours. They are never shared, published, or used for anything except running the job you asked for. The one exception is transcription: the Transcript Generator and Auto Subtitles send your audio (never the video, and never your account details) to our speech-to-text provider, Groq, which returns the text. See our Privacy Policy for the full list of processors.
Free plan: 3 uses per day. Pro and Premium raise or remove the limit.