Are my audio or video files uploaded to a server?

Absolutely not. The entire transcription process, including AI model execution and audio decoding, happens locally within your browser's memory using WebAssembly.

Which file formats are supported?

The tool supports virtually all common audio and video formats, including MP3, WAV, MP4, MKV, WebM, MOV, and AAC, thanks to our dual-engine (Web Audio API + FFmpeg.wasm) decoder.

What does 'Words Per Segment' mean?

This setting allows you to control subtitle pacing. For example, setting it to '1' creates karaoke-style word-by-word captions, while '4-7' creates standard, readable video subtitles.

Do I need a powerful computer?

Smaller models like 'Tiny' or 'Base' run smoothly on most modern laptops and phones. The 'Large-v3' model provides maximum accuracy but requires a device with at least 8GB of RAM.

🚧 Experimental: This tool is still in development and undergoing improvements. It is not yet fully complete, but you can use it. We welcome your feedback on what more we can improve!

Audio Transcriber

Transcribe audio and video files to text locally in your browser using Whisper AI. Zero uploads, 100% private, with dynamic subtitle chunking.

Select your file here to get started

or drop your file here.

.mp3.wav.mp4.webm.mov.mkv.aac.ogg

Max 2000MB. 100% Private. Files never leave your device.

What to expect

Experience fast, secure, and completely private processing directly inside your web browser.

100% Private & Local

Your media files are processed entirely in your browser. Zero server uploads.

99+ Languages Supported

Accurate transcription and translation for almost any language globally.

Dynamic Subtitle Chunking

Customize exactly how many words appear per subtitle segment for perfect video editing sync.

Multi-Format Export

Instantly download your results as SRT, VTT, ASS, TXT, JSON, or CSV.

How it works

Simply upload your content, adjust your settings, and download the result instantly.

Upload Media

Select any audio or video file (MP3, MP4, WAV, MKV, etc.).

Configure Settings

Choose your Whisper model, language, and subtitle chunking preferences.

Transcribe & Export

Process locally and download your transcript in SRT, VTT, TXT, or other formats.

Frequently Asked Questions

Get quick answers about supported formats, data privacy, and using this tool.

Audio Transcriber - Transcribe audio and video files to text locally in your browser using Whisper AI. Zero uploads, 100% private, with dynamic subtitle chunking.

About This Tool

Transform any audio or video file into accurate text transcripts directly in your web browser. Powered by OpenAI's Whisper model running locally via WebAssembly, this tool guarantees 100% privacy—your sensitive meetings, interviews, and media files never leave your device. Unlike cloud-based services that charge per minute or risk your data, our local transcriber supports 99+ languages, dynamic word-level subtitle chunking (perfect for TikTok, YouTube, or professional editing), and exports to SRT, VTT, ASS, TXT, JSON, and CSV formats. Simply upload your file, choose your settings, and get studio-quality transcripts instantly.

audio transcriberwhisper browserspeech to textlocal transcriptionsrt generatorvideo to text

100% Open Source & Trustworthy

Every tool on PrivateTools is fully open source and runs entirely in your browser. No server uploads. No tracking. No hidden code. You can verify the source code yourself on GitHub at any time.

Open Source Code

Full source code available on GitHub — inspect, fork, or contribute.

Verify & Audit

Read every line of code. Nothing is hidden. Total transparency.

Browser-Local Processing

Files never leave your device. Zero server uploads. 100% private.

Community & Support

PrivateTools is built by the community, for the community. Found a bug? Have a tool idea? Want to report an issue? We'd love to hear from you. Every contribution makes these tools better for everyone.

PrivateTools on GitHub

https://github.com/sikandardevbusiness/privatetools

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