Audio Joiner
Combine multiple audio files into a single track, in any order, with optional crossfade. Processed locally on the server, no points used.
Drop audio files here or browse
MP3, WAV, FLAC, M4A, OGG, AAC (max 20MB each, up to 10 files)Drag to reorder
Joining your audio files...
Merging and encoding with FFmpeg
How It Works
- Upload 2 or more audio files
- Drag to reorder, pick output format
- Click Join, then download your merged file
Tips
- Drag items to change the order
- Crossfade smoothly blends between tracks
- Mixing different formats is fine, all get converted automatically
- Processing is instant and free (no points used)
Joining your audio files...
Merging and encoding with FFmpeg
My Joined Files
Audio Joined!
Why Choose Audio Joiner
Completely Free
Audio is processed locally with FFmpeg, so no external API is called and no points are deducted from your account.
Instant Processing
Files are merged server-side with FFmpeg in seconds. There is no API queue to wait for, so your joined audio is ready almost immediately.
Crossfade Support
Add a crossfade of 1 to 5 seconds between tracks so each transition fades out and in rather than cutting abruptly.
Drag & Reorder
Drag files up or down the list to set the exact playback order before joining. MP3, WAV, FLAC, M4A and more can all be mixed together freely.
Perfect For
Powered by FFmpeg
Professional Audio Processing
Audio Joiner uses FFmpeg, the open-source multimedia framework used by YouTube, Spotify, and broadcast studios worldwide. Your files are processed entirely on the server with no external API calls.
All audio formats are automatically converted and resampled to match before joining. Optional crossfade uses FFmpeg's acrossfade filter for smooth, professional transitions between tracks.
Frequently Asked Questions
You can join up to 10 audio files in a single operation. Each file can be up to 20MB. If you need to join more files, simply join them in batches.
Yes. Audio Joiner runs FFmpeg on the server rather than calling an external AI API, so no points are deducted from your account and there is zero per-operation cost.
MP3, WAV, FLAC, M4A, OGG, AAC, and WMA. You can mix different formats in the same batch, and FFmpeg converts each file to a matching format before stitching them together.
Yes, after uploading your files you can drag and drop them to rearrange the order. The final output will follow the order shown in the file list.
Crossfade overlaps the end of one track with the beginning of the next so they fade through each other rather than cutting abruptly. Choose 1 to 5 seconds depending on how gradual you want the overlap.
Usually just a few seconds. Since everything is processed locally with FFmpeg (no external API calls), the result is nearly instant. Larger files or FLAC/WAV output may take slightly longer.
MP3 (compressed, universal), WAV (uncompressed, lossless), FLAC (compressed, lossless), and M4A/AAC (compressed, high quality). MP3 is recommended for most use cases.
When using WAV or FLAC output, there is zero quality loss. For MP3 and M4A, files are encoded at high bitrate (192-256 kbps) to maintain excellent quality. Source files in different sample rates are automatically resampled to match.
You can use Audio Joiner as a guest, but creating a free account lets you access your join history and download previous files. Since the tool is completely free and uses no points, there's no cost either way.
Yes. Audio Joiner normalizes all input files to a consistent sample rate and channel layout before merging, so you can mix files recorded at different quality levels and FFmpeg handles the conversion automatically.
Audio Joiner vs Other Methods
| Feature | Luxoret AI | Manual / Traditional | Other Tools |
|---|---|---|---|
| Speed | Results in seconds | Hours in a studio | Minutes per track |
| Equipment | Just a browser | Professional studio gear | Desktop app required |
| Skill Required | None — fully automated | Audio engineering skills | Some learning curve |
| Quality | Professional AI output | Depends on engineer skill | Basic quality |
| Format Support | MP3, WAV, and more | Varies by studio | Common formats only |