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Audio Joiner

Join multiple audio files into one seamless track. Free, fast, processed locally.

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 — download your merged file

Tips

  • Drag items to change the order
  • Crossfade smoothly blends between tracks
  • Mixing different formats is fine — all get converted
  • Processing is instant and free (no points used)

Also Try

Why Choose Audio Joiner

Completely Free

Zero API cost — audio is processed locally with FFmpeg. No points deducted, join unlimited files.

Instant Processing

Files are merged server-side in seconds. No waiting for API queues — your joined audio is ready almost immediately.

Crossfade Support

Optionally blend tracks together with smooth crossfades from 1 to 5 seconds for seamless transitions.

Drag & Reorder

Easily rearrange your files in any order before joining. Mix different audio formats — MP3, WAV, FLAC, M4A all supported.

Perfect For

Podcasts Music Production Voice Recordings Audiobooks DJ Mixes Presentations Sound Design

Powered by FFmpeg

Professional Audio Processing

Audio Joiner uses FFmpeg, the industry-standard open-source multimedia framework trusted by YouTube, Spotify, and professional studios worldwide. Your files are processed entirely on the server — no external API calls, no waiting.

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, completely free. Audio Joiner uses FFmpeg for local server-side processing — no external AI APIs are called, so there is zero cost. No points are deducted from your account.

MP3, WAV, FLAC, M4A, OGG, AAC, and WMA. You can even mix different formats in the same batch — they are all automatically converted before joining.

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 smoothly blends the end of one track into the beginning of the next, creating a seamless transition instead of an abrupt cut. Choose 1-5 seconds depending on how gradual you want the transition.

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 automatically normalizes all input files to a consistent sample rate and channel layout before merging. You can freely mix files recorded at different quality levels — FFmpeg handles the conversion seamlessly.

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