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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)

Joining your audio files...

Merging and encoding with FFmpeg

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How It Works

  1. Upload 2 or more audio files
  2. Drag to reorder, pick output format
  3. 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)

Also Try

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

Podcasts Music Production Voice Recordings Audiobooks DJ Mixes Presentations Sound Design

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