Audio Merger — Free Online

Combine two audio files into one. Concatenate MP3s, WAVs, and other formats in your browser.

File 1 (played first)

Tus archivos se eliminan aproximadamente una hora después

File 2 (played second)

Tus archivos se eliminan aproximadamente una hora después

Joining two audio files end-to-end is a task that comes up constantly: stitching an intro jingle onto a podcast episode, concatenating two takes of a voice recording, or assembling a continuous music mix from separate tracks. Most dedicated audio tools handle this well, but they require installation and several steps just to perform what is conceptually a very simple operation.

This merger accepts two audio files, joins them sequentially, and produces a single combined output file. It handles format matching automatically, so you can merge an MP3 with a WAV and receive a clean result without any manual conversion step. Everything runs in your browser — no upload required.

How to Merge Audio Files Online

  1. 1

    Upload your audio files

    Drop two or more MP3, WAV, FLAC, OGG, or AAC files. Files up to 100 MB each are supported.

  2. 2

    Arrange the order

    Drag and drop to set the sequence. Files will be joined in the order you set.

  3. 3

    Download your merged audio

    Click Merge. FileCrank concatenates all files into a single audio file. Files are deleted within 1 hour.

How Audio Concatenation Works

Concatenating audio files correctly requires that both streams share the same sample rate and channel count before they are joined. The tool decodes both input files using WebAssembly FFmpeg, detects their audio properties, and — when they differ — resamples the second file to match the first. This ensures the join point is seamless and free from pitch or tempo jumps caused by sample-rate mismatches.

Once both streams are normalised, FFmpeg's concat demuxer chains them into a single timeline and encodes the result. The approach avoids loading both full PCM buffers into memory simultaneously by processing in segments, which keeps the tool usable even for longer recordings on memory-constrained devices.

Why Use FileCrank to Merge Audio?

  • ✓ Merge unlimited audio files into one in a single step.
  • ✓ Supports MP3, WAV, FLAC, OGG, and AAC input.
  • ✓ Drag-and-drop to reorder files before merging.
  • ✓ No watermarks, no signup, completely free.
  • ✓ Files are processed securely and deleted within 1 hour.

Características y Especificaciones

Tamaño máx. de archivo
Hasta 100 MB
Privacidad
Archivos eliminados tras aproximadamente una hora
Precio
Gratis, sin registro
Procesamiento
En el servidor
Archivos eliminados en 1 hora — automáticamente.No se requiere registro.Gratis — sin cargos ocultos.

Frequently Asked Questions

Can I merge different audio formats?

Yes. FileCrank converts all input files to the same format before joining them, so you can mix MP3, WAV, and OGG files freely.

Is there a limit on how many files I can merge?

There is no hard limit on the number of files. The total size of all files must be under 100 MB each.

Will there be silence between the merged clips?

No. FileCrank concatenates files seamlessly without any gap.

Browser Merger vs Audio Editor

Audio editors like Audacity support track concatenation, but the workflow — import, align on the timeline, export — is overkill for a two-file join. Online services that handle this typically upload your files to a server, which is a privacy concern for sensitive recordings. This tool joins files locally in the browser with no upload and no account required.

FileCrank Audio Merger concatenates multiple audio files into one. Supports MP3, WAV, FLAC, OGG, and AAC. Free, no signup, files deleted within 1 hour.

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