Aiko screenshot

What is Aiko?

Aiko is a macOS audio transcription application developed by Sindre Sorhus that converts spoken audio into text. The app processes audio files directly on your device rather than sending them to external servers, which means your recordings stay private and you don't need a constant internet connection for transcription. The tool is designed for anyone who needs to convert audio to text: journalists recording interviews, students capturing lectures, content creators transcribing podcasts, or professionals documenting meetings. It handles the technical side of speech recognition so you can focus on your work. Being built by Sindre Sorhus, a well-known open-source developer, Aiko benefits from a focus on simplicity and reliability. The on-device processing approach differentiates it from cloud-based alternatives, offering both privacy protection and lower ongoing costs for frequent users.

Key Features

On-device transcription

processes audio locally without uploading to external servers

Multiple file format support

works with common audio formats including MP3, WAV, and M4A

Batch processing

transcribe multiple audio files in succession

Editable transcripts

review and correct the text output within the application

Export options

save transcripts in various formats for use in other applications

Pros & Cons

Advantages

  • Privacy focused: audio files never leave your computer
  • Works offline: no internet required for transcription once the app is installed
  • Lower cost for heavy use: no per-minute or per-hour charges like cloud services
  • Straightforward interface: designed to be simple rather than feature-heavy

Limitations

  • macOS only: not available for Windows, Linux, or mobile platforms
  • Processing speed depends on your Mac's specifications: older machines may transcribe slowly
  • Accuracy varies: on-device models may not match cloud-based services for heavily accented or poor-quality audio

Use Cases

Transcribing recorded interviews or conversations for journalism or research

Converting lecture or conference recordings into readable notes

Creating text versions of podcast episodes or audio content

Documenting meetings or discussions while maintaining audio privacy

Preparing accessible transcripts for video or audio content