Audio Change Bitrate

Re-encode audio to a new bitrate while keeping the same format

Click to upload file or drag and drop file here

Maximum file size: 60MB Supported formats: audio/mpeg, audio/aac, audio/mp4, audio/x-m4a, audio/ogg, audio/opus

Key Facts

Category
Images, Audio & Video
Input Types
file, select, checkbox
Output Type
file
Sample Coverage
4
API Ready
Yes

Overview

Audio Change Bitrate re-encodes your audio files to a specific bitrate while preserving the original format. Upload MP3, AAC, M4A, OGG, or Opus files up to 60MB and adjust bitrate, sample rate, and channel settings to optimize file size or audio quality for streaming, storage, or distribution.

When to Use

  • •Reduce file size to meet hosting platform limits or mobile storage constraints
  • •Standardize audio specifications across a media library for consistent playback
  • •Optimize voice recordings by converting stereo to mono and lowering bitrate

How It Works

  • •Upload an audio file in MP3, AAC, M4A, OGG, or Opus format up to 60MB
  • •Select target bitrate from 96 kbps to 320 kbps based on your quality or size requirements
  • •Optionally adjust sample rate to 44.1 kHz or 48 kHz, and convert between stereo and mono channels
  • •Download the re-encoded file in the same format with preserved metadata (if selected)

Use Cases

Compress high-quality music files for mobile devices with limited storage
Standardize podcast episodes to platform-specific bitrate requirements
Optimize audiobook files by reducing bitrate and converting to mono for faster downloads

Examples

1. Podcast Hosting Optimization

Independent Podcast Producer
Background
Weekly interview episodes recorded in stereo at 320 kbps result in 80MB files that exceed the hosting plan's 50MB upload limit.
Problem
Need to reduce file size while maintaining voice clarity for speech content.
How to Use
Upload the stereo MP3 recording, select 128 kbps target bitrate, change Audio Channels to Mono, and keep Sample Rate on Auto.
Outcome
File size drops by approximately 60% with clear voice quality, meeting hosting requirements without noticeable quality loss for listeners.

2. Music Library Standardization

Digital Music Collector
Background
Music library contains tracks with mixed bitrates ranging from 96 kbps to variable high rates, causing inconsistent playback experiences across devices.
Problem
Standardize all tracks to 256 kbps for consistent car stereo compatibility while preserving existing metadata.
How to Use
Upload variable bitrate files, set Target Bitrate to 256k, ensure Keep Metadata is enabled, and process each file.
Outcome
Uniform high-quality files with intact artist and title tags, ensuring consistent volume and quality during playback.

3. Audiobook Mobile Distribution

Audiobook Distributor
Background
Original 320 kbps stereo master files are too large for convenient mobile download on slow cellular connections.
Problem
Create compact files optimized for voice narration without sacrificing intelligibility.
How to Use
Upload the stereo MP3, select 96 kbps bitrate, convert channels to Mono, and set sample rate to 44100 Hz.
Outcome
Dramatically smaller files suitable for mobile streaming and storage while maintaining clear, intelligible narration.

Try with Samples

audio, video, file
Copyright-Free AAC Audio Samples
High-quality AAC encoded audio samples for testing and development, featuring nature sounds and meditation music with excellent compression
title token audio
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
title token audio
audio
Copyright-Free OGG Vorbis Audio Samples
Open-source OGG Vorbis audio samples for testing and development, featuring excellent compression with nature sounds and meditation music
title token audio
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 audio
audio

Related Hubs

Audio Encoding and Format Conversion Tools
Compare audio format conversion, bitrate changes, sample-rate conversion, codec swaps, and export tools in one hub for delivery and archive workflows.
Video-to-Audio and Animation Conversion Tools
Compare tools that turn video into audio, extract video streams, and convert between short-form video and animated image formats in one hub.
Audio Editing and Cleanup Tools
Compare audio trimming, silence removal, fades, mixing, and denoise tools in one hub for podcast, voiceover, and music cleanup workflows.
Video Preview, Extraction, and Subtitle Tools
Compare video preview generation, stream extraction, audio extraction, subtitle translation, and quick flip tools in one hub for lightweight video prep workflows.

FAQ

What audio formats are supported?

MP3, AAC, MP4/M4A, OGG, and Opus files up to 60MB.

Will lowering the bitrate reduce audio quality?

Yes, lower bitrates produce smaller files but may reduce fidelity, particularly for music. Voice content typically tolerates lower bitrates well.

Can I convert stereo audio to mono?

Yes, select Mono (1 channel) in the Audio Channels dropdown to reduce file size, which is ideal for voice recordings.

Does this tool change the file format?

No, the output maintains the same format as the input. An MP3 input produces an MP3 output at the new bitrate.

What happens to metadata like artist names and titles?

Metadata is preserved by default. Uncheck Keep Metadata to remove tags during conversion.

API Documentation

Request Endpoint

POST /en/api/tools/audio-change-bitrate

Request Parameters

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

File type parameters need to be uploaded first via POST /upload/audio-change-bitrate 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-audio-change-bitrate": {
      "name": "audio-change-bitrate",
      "description": "Re-encode audio to a new bitrate while keeping the same format",
      "baseUrl": "https://elysiatools.com/mcp/sse?toolId=audio-change-bitrate",
      "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]