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Cifrivo
Audio

Merge audio

Arrange multiple audio files, preview them and join them into one MP3.

FreeNo sign-upLocal processing

Your files are processed locally and never leave your device.

Drop your audio files here

Choose files from your device. URLs and platform downloads are not accepted. Up to 10 files, 100 MB each and 300 MB in total.

How it works

  1. Select the files accepted by Merge audio.
  2. Choose the output and quality options.
  3. Start local processing and follow the real progress.
  4. Review the actual result and download it.

Practical example

Select a file in Merge audio, choose 192 kbps when available and compare the real input and output sizes after processing.

Formula and explanation

Each input is decoded, resampled to a common 44.1 kHz stereo stream and concatenated in the displayed order before MP3 encoding.

Supported path: MP3, WAV, M4A, FLAC, OGG → MP3. Compatibility also depends on the codec contained in each file.

Processing runs with FFmpeg WebAssembly inside this browser. Files are not uploaded to Cifrivo or a third-party service.

Frequently asked questions

Is Merge audio free?

Yes. It is free and requires no account.

Are my files uploaded?

No. All decoding, encoding and downloads happen locally in your browser.

Which formats are supported?

This tool supports MP3, WAV, M4A, FLAC, OGG → MP3. A valid extension, MIME type and file signature are checked first.

Audio

Audio cutter

Choose a precise start and end point, preview your audio and export the selected segment.

Audio

Compress audio

Reduce MP3, WAV or M4A file size with high, balanced or maximum compression.

Audio

Change audio bitrate

Re-encode MP3 audio at 64, 96, 128, 192, 256 or 320 kbps and compare actual size.