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MP3 to Opus Converter

Convert MP3 audio to Opus with bitrate, resampling, and channel options

Click to upload file or drag and drop file here

Maximum file size: 50MB Supported formats: audio/mpeg, audio/mp3

Select the source audio file

Key Facts

Category
Media
Input Types
file, select, checkbox
Output Type
file
Sample Coverage
4
API Ready
Yes

Overview

The MP3 to Opus Converter is a high-efficiency tool designed to transform your MP3 audio files into the Opus format, offering superior compression and audio quality. With customizable settings for bitrate, sample rate, and channel configuration, it provides a flexible solution for optimizing audio for web streaming, storage, or specialized playback.

When to Use

  • •When you need to reduce file size while maintaining high audio fidelity for web applications.
  • •When you want to standardize audio assets by adjusting bitrates or channel counts.
  • •When preparing audio files for platforms that prioritize the Opus codec for low-latency streaming.

How It Works

  • •Upload your source MP3 file using the file selector.
  • •Adjust your preferred output settings, including bitrate, sample rate, and channel count.
  • •Toggle the metadata option if you wish to preserve original track information.
  • •Click the convert button to process your file and download the resulting Opus audio.

Use Cases

Optimizing podcast episodes for faster loading times on web players.
Converting music libraries to a more efficient format for mobile storage.
Standardizing audio assets for consistent playback across different hardware devices.

Examples

1. Web-Optimized Podcast Hosting

Content Creator
Background
A podcaster needs to upload episodes to a website but wants to minimize bandwidth usage without sacrificing voice clarity.
Problem
Large MP3 files are causing slow page load times for listeners.
How to Use
Upload the MP3 file, set the bitrate to 96 kbps for a balance of quality and size, and ensure metadata is preserved.
Example Config
Bitrate: 96 kbps, Sample Rate: 48 kHz, Channels: Mono, Keep Metadata: Yes
Outcome
A significantly smaller Opus file that maintains excellent voice quality, resulting in faster streaming for the audience.

2. Standardizing Audio for App Development

Software Developer
Background
A developer is building a mobile app that requires all audio assets to be in the Opus format with a consistent 48 kHz sample rate.
Problem
The source assets are in various MP3 formats with inconsistent sample rates.
How to Use
Batch process the files by setting the sample rate to 48 kHz and selecting Stereo output to ensure uniformity.
Example Config
Bitrate: 128 kbps, Sample Rate: 48 kHz, Channels: Stereo, Keep Metadata: No
Outcome
A set of standardized Opus files ready for seamless integration into the mobile application.

Try with Samples

audio, file
Copyright-Free MP3 Audio Samples
Collection of royalty-free audio samples for testing and development purposes including nature sounds, meditation music, and ambient audio
title token mp3
audio
Copyright-Free OPUS Audio Samples
Next-generation OPUS audio samples with superior compression and quality, featuring nature sounds and meditation music optimized for modern streaming
title token opus
audio
Copyright-Free WAV Audio Samples
Uncompressed PCM WAV audio samples for testing and development, mirrored from MP3 set with nature sounds and meditation music
preferred input family audio
audio
Copyright-Free FLAC Audio Samples
Lossless FLAC audio samples for testing and development, mirrored from MP3 set with nature sounds and meditation music
preferred input family audio
audio

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FAQ

What is the advantage of converting MP3 to Opus?

Opus is a highly versatile codec that provides better audio quality at lower bitrates compared to MP3, making it ideal for internet streaming and bandwidth-sensitive applications.

Can I change the audio channels during conversion?

Yes, you can choose to keep the original channel count or force the output to Mono or Stereo.

Does the tool preserve my ID3 tags?

Yes, if you enable the 'Keep Metadata' checkbox, the tool will attempt to preserve title and artist tags from the original MP3 file.

What is the maximum file size I can upload?

You can upload MP3 files up to 50 MB in size.

Is the conversion process secure?

Your files are processed locally or in a secure environment and are not stored permanently on our servers.

API Documentation

Request Endpoint

POST /en/api/tools/mp3-to-opus

Request Parameters

Parameter Name Type Required Description
audioFile file (Upload required) Yes Select the source audio file
bitrate select No -
sampleRate select No -
channels select No -
keepMetadata checkbox No -

File type parameters need to be uploaded first via POST /upload/mp3-to-opus to get filePath, then pass filePath to the corresponding file field.

Response Format

{
  "filePath": "/public/processing/randomid.ext",
  "fileName": "output.ext",
  "contentType": "application/octet-stream",
  "size": 1024,
  "metadata": {
    "key": "value"
  },
  "error": "Error message (optional)",
  "message": "Notification message (optional)"
}
File: File

AI MCP Documentation

Add this tool to your MCP server configuration: 

{
  "mcpServers": {
    "elysiatools-mp3-to-opus": {
      "name": "mp3-to-opus",
      "description": "Convert MP3 audio to Opus with bitrate, resampling, and channel options",
      "baseUrl": "https://elysiatools.com/mcp/sse?toolId=mp3-to-opus",
      "command": "",
      "args": [],
      "env": {},
      "isActive": true,
      "type": "sse"
    }
  }
}

You can chain multiple tools, e.g.: `https://elysiatools.com/mcp/sse?toolId=png-to-webp,jpg-to-webp,gif-to-webp`, max 20 tools.

Supports URL file links or Base64 encoding for file parameters.

If you encounter any issues, please contact us at [email protected]