Free Online Audio Joiner
Merge multiple audio files into a single track. Add crossfades, silence gaps, and create seamless audio compilations.
Unlimited Clips
Merge as many audio files as you need
Crossfade
Smooth transitions between tracks
Silence Gaps
Add pauses between clips
Any Format
Mix different audio formats together
How It Works
Add Audio Files
Upload or drag multiple audio files
Arrange & Configure
Reorder clips, add crossfades or gaps
Download
Get your merged audio file
Perfect For
Podcasters
Combine intro, segments, and outro into a single episode
Musicians
Create mixtapes or combine song sections
Audiobook Creators
Merge chapters into a complete book
Why Use Our Audio Joiner?
What Is an Audio Joiner? Complete Guide
An audio joiner is an online tool that lets you combine two or more audio files into a single, seamless track. Whether you need to merge a podcast intro with your main recording, join multiple song sections, or create a continuous mix, an audio merger handles it all — no software installation required.
Defyaudio's online audio joiner runs entirely in your browser, meaning your files never leave your device. This makes it one of the most private audio joiner tools available. Unlike traditional desktop software, there is nothing to download — just open the tool, add your clips, and combine them in seconds.
The audio joiner gives you full control over how clips are joined: set the playback order, add crossfades for smooth blending, or insert silence gaps between tracks. The result is a single polished file ready to share or publish.
How to Use the Audio Joiner (Step-by-Step Guide)
Merging audio online with Defyaudio takes less than a minute. Follow these steps to combine audio clips into one file.
- 1
Open the Audio Joiner
Navigate to the Audio Joiner tool on the Defyaudio homepage.
- 2
Upload your files
Click "Add Files" or drag and drop your audio clips. You can add as many files as needed — there is no limit.
- 3
Arrange the order
Drag clips into the sequence you want. The merged audio online will follow this exact order.
- 4
Configure transitions
Choose a crossfade duration for smooth blending between audio clips, or add silence gaps to create natural pauses.
- 5
Select an output format
Pick your preferred format: MP3, WAV, OGG, and more.
- 6
Merge and download
Click "Merge" to combine audio clips in your browser. Once done, your file downloads instantly.
Supported Formats
Defyaudio's audio joiner supports all major formats, so you can merge audio files regardless of their source. You can even combine audio files from different formats in the same session.
MP3
The most common format. Our MP3 joiner handles bitrates from 64 kbps to 320 kbps — ideal for podcasts and music.
WAV
Lossless audio for professional-quality merges with no compression artifacts.
OGG
Open-source format widely used in games and web applications.
FLAC
High-resolution lossless audio, perfect for audiophiles wanting to combine MP3 files with studio-quality clips.
AAC
Efficient compressed format used by Apple devices and streaming platforms.
M4A
Common on iOS and macOS. Combine audio files from any Apple device seamlessly.
Merge Audio with Fade In and Fade Out
Defyaudio's audio joiner supports crossfade transitions — a smooth fade-out at the end of one clip combined with a fade-in at the start of the next. This is the standard technique for professional audio merges.
Crossfade (fade in + fade out)
Set a crossfade duration between any two clips. As the first track fades out, the second simultaneously fades in — creating a seamless blend with no audible cut.
Silence gaps
Insert a silence gap of any length between clips for a clean, neutral pause — ideal for podcast segments or audiobook chapters.
Per-clip control
Apply different crossfade durations between different pairs of clips in the same session.
Works with any format
Fade in and fade out transitions work across MP3, WAV, FLAC, OGG, M4A and all other supported formats.
Frequently Asked Questions
How many audio files can I merge?
There's no limit! You can merge as many audio files as you need. The tool handles everything from combining 2 files to merging dozens of clips.
Can I add silence between clips?
Yes! You can add custom silence gaps between any clips. This is perfect for creating pauses between podcast segments or audiobook chapters.
What's a crossfade?
A crossfade smoothly transitions from one audio clip to the next by gradually fading out the first while fading in the second. This creates professional, seamless transitions.
Can I merge different audio formats?
Absolutely! You can mix MP3, WAV, FLAC, and any other supported format. The output can be in your choice of format.
Is there a file size limit?
Processing happens in your browser, so limits depend on your device's memory. Most modern devices can handle hours of audio without issues.