Online Audio Converter for MP3, WAV, M4A and OGG

How the online audio converter works

Start by deciding what you want to keep: the sound, the words, or a spoken version of a document. A format change preserves an audio recording as audio. Transcription turns speech into an editable draft. Text to speech creates a new recording from writing. Choosing the right workflow prevents unnecessary conversions and helps you keep track of which version is your original. The online audio converter is the place to start when you already have a recording and simply need a different audio format.

Supported formats: MP3, WAV, M4A, OGG and MP4

MP3 is a practical listening format when a destination expects a familiar audio extension. WAV is useful for an uncompressed editing copy, although its size can be much larger. M4A stores audio in a container used by many recording applications. OGG provides another compressed option. An MP4 file can contain video and sound; extracting its audio produces a separate listening file and leaves the original video intact. Select the output that your destination actually accepts rather than assuming every application supports every format.

Audio to text and text to speech with AI

For an interview, use audio transcription to get timestamps and speaker labels, then review the words against the recording. For a presentation script, choose a voice and generate narration. The PDF workflow first extracts document text locally, then sends that text for speech generation. AI results need review: names, timing and pronunciation can be wrong. Payments are coming soon, so check availability on the pricing page before planning an AI project. Local format conversion remains available independently of an AI credit balance.

Online audio converter: four steps

1. Select your source

   Choose a local recording that you have permission to convert. Check its name and play a passage first, particularly if several similarly named versions exist on your device.

2. Set the output

   Choose MP3, WAV, M4A or OGG in the format selector. For an MP3 listening copy, compare the 128, 192 and 320 kbps options with your destination requirements.

3. Run the conversion

   Start conversion and allow the browser to finish reading and encoding the recording. The conversion engine loads when needed, so the first run can take longer while its files download.

4. Save and verify

   Download the completed result and play it in the intended application. Confirm the duration, sound and filename before sharing it or closing the browser tab.

Files stay on your device

Local conversion reads the source in your browser through ffmpeg.wasm. The sound is not uploaded to a conversion server, although your browser must download the application and conversion engine. Available memory and the source codec affect whether a file can be processed successfully. Very large recordings can exceed browser resources. Close unnecessary tabs, keep the device awake and retain your source if a conversion fails. A successful download should be checked in the player where you plan to use it.