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Whisper Web
Free MP4 Transcription

Convert MP4 to Text Free with AI

Upload an MP4 video and extract a full text transcript. Powered by OpenAI Whisper running locally in your browser. No upload to servers, no signup, free local processing.

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The Easiest Way to Transcribe MP4 Videos

Built for MP4

Optimized for the world's most common video format. Drag and drop your .mp4 file and extract the text in minutes.

Zero Upload

Your MP4 file is processed entirely in the browser. It is never sent to any server. Safe for confidential videos.

100+ Languages

Transcribe MP4 videos in English, Spanish, French, German, Chinese, Japanese, Korean, Arabic, and 100+ other languages.

Fast Processing

WebGPU acceleration makes transcription 3–5x faster. A 30-minute MP4 typically processes in under 10 minutes.

Timestamped Segments

Get time-aligned text segments so you can pinpoint exactly when each part was spoken in the original video.

TXT & JSON Export

Download the transcript as plain text or structured JSON with timestamps. One-click copy to clipboard also available.

How to Convert MP4 to Text

1

Upload Your MP4 File

Drag and drop your .mp4 file onto the page, or click to browse. We automatically extract the audio track.

2

Select Model & Language

Choose a Whisper model (Base is recommended for most MP4s) and select the spoken language.

3

Transcribe

Click start and watch the AI transcribe your MP4 segment by segment during processing. Everything runs locally on your device.

4

Export

Copy the transcript to clipboard, or download as TXT or JSON. No email or signup required.

Common MP4 Transcription Scenarios

Transcribe video podcasts saved as MP4
Convert video interviews and meetings to text
Create text transcripts for YouTube videos
Transcribe MP4 recordings of Zoom calls
Generate subtitles or captions from video
Convert lecture recordings into study notes
Create searchable archives of video content
Transcribe social media videos

Frequently Asked Questions

Can I upload large MP4 files?
Yes — there is no file size limit. All processing runs on your device, so there are no server-imposed upload restrictions. Users regularly transcribe MP4 files over 1 GB without issue.
Do I need to convert MP4 to audio first?
No. You can upload the MP4 directly. Our browser-based tool automatically extracts the audio track from the video file locally before processing it with Whisper.
How accurate is MP4 transcription?
OpenAI Whisper achieves a 4.2% word error rate on standard benchmarks. On clear speech with minimal background noise, expect 95%+ accuracy.
Can I transcribe multiple MP4 files?
With the free Unlimited plan, you can batch-upload multiple files for cloud transcription. In local mode, files are processed one at a time.
Is this really free?
Yes. Local mode is completely free with no account, no signup, and no usage limits. The AI model runs on your own hardware.
What if my file isn't MP4?
Whisper Web supports all common video and audio formats: MOV, WebM, AVI, MKV, MP3, WAV, etc. Simply upload any media file your browser can decode.

Transcribe Your MP4 Videos — Free

No signup. No server upload. Free local processing. Just drag, drop, and transcribe.

Upload MP4 & Transcribe