Audio Merger Online
Join multiple MP3, WAV, OGG, and FLAC files into one, in the order you choose. Drag to reorder, mix formats, and process locally in your browser — no upload needed.
Local processing, privacy-safe
Your audio never leaves your device — no upload, full privacy
Reorder however you like
Drag files or use the up/down buttons to set the order — the list order becomes the playback order
Mix formats freely
Upload MP3, WAV, OGG, and FLAC together — sample rate and channel count are normalized automatically
Use Cases
- Combine multi-part voice recorder files into one complete meeting recording
- Merge multiple audiobook or podcast chapters into a single file for uninterrupted listening
- String several songs together into one continuous playlist for running or party background music
- Join narration recorded in separate takes into a single voiceover track for video
- Merge multiple lesson recordings into one archive to cut down on file count
- Join separately recorded instrumental and vocal takes in order into a complete track
About Audio Merger
The audio merger joins multiple audio files end to end into a single file, with the output duration equal to the sum of all segments. It accepts mixed input in MP3, WAV, OGG, FLAC, and M4A — different sample rates and channel counts are automatically normalized before joining — and outputs MP3, WAV, OGG, or FLAC. Everything runs locally in your browser using WebCodecs for fast processing, with no file upload, keeping your data completely private.
If you only need to cut out one part, use Audio Trimmer; to shrink audio for sharing, use Audio Compressor; and if you're joining video instead, use Video Merger.
How to Use
Upload Audio
Select or drag in at least 2 audio files
Adjust Order
Drag or use the up/down buttons to set the playback order
Choose Format
Choose an output format (defaults to the first file's format)
Download File
Preview and download the file as soon as merging is done
Frequently Asked Questions
How many audio files can I merge at once?
At least 2, with no hard limit on the number. The practical limit depends on your device's memory — for the best experience, we recommend keeping the total combined duration under 2 hours.
Can I merge audio files of different formats?
Yes. MP3, WAV, OGG, FLAC, and M4A files can be mixed together — the tool automatically normalizes the sample rate and channel count before joining them in the order you set.
How do I change the order the audio files are merged in?
Drag any item in the file list to reorder it, or use the up/down buttons on the right for fine adjustments. The list order from top to bottom becomes the final playback order.
Will merging reduce audio quality?
Merging requires re-encoding. Choosing WAV or FLAC as the output keeps it lossless with no quality loss; MP3 or OGG output uses a high-quality preset that's virtually indistinguishable to the ear.
Will my files be uploaded to a server?
No. All processing happens locally in your browser — your audio file never leaves your device. We use WebCodecs technology for fully client-side processing that keeps your privacy intact.
What happens if one of the files is corrupted?
The tool will clearly flag which file has no audio track or can't be decoded, and stop the merge instead of silently skipping it — so you never end up with a file missing a section. Just remove or replace that file and start again.