Merge audio

Drop in multiple audio files and merge them in your browser — no software to install.

About Merge audio

Merge audio files in order in your browser—no cloud upload. Free, private, export one file locally with NanoPix.

How to Merge Audio Files Locally in Your Browser

Combine multiple songs, voiceovers, or podcasts into a single track without uploading.

  1. 1Add your audio files to the NanoPix audio merge workspace.
  2. 2Drag tracks up or down to arrange their sequence, and trim boundaries if desired.
  3. 3Choose your target output format (MP3, M4A, or WAV) and click Export.

Tool facts

Processing
Runs locally in your browser. Source files are not uploaded to NanoPix for editing.
Available controls
Clip drag-and-drop reordering · Streaming decode-encode with zero memory overflow · Unified sample rate & channels
Output
Export one audio file

Frequently asked questions

What can Merge audio do?
Merge audio files in order in your browser—no cloud upload. Free, private, export one file locally with NanoPix.
Will merging audio with different sample rates (e.g. 44.1kHz vs 48kHz) cause pops or desync?
No. NanoPix employs automated audio resampling (`aresample`) and channel alignment in its WASM pipeline, normalizing all inputs to pristine 48kHz stereo with zero audio artifacts.
Will merging long audio files (e.g. 1+ hour podcasts) crash browser RAM?
No. NanoPix operates on a streaming decode-and-encode pipeline with constant O(1) memory overhead. Decoded frames are immediately processed and garbage collected, handling hours of audio safely even on mobile browsers.
Are my files uploaded to your servers?
No. NanoPix runs in your browser with WebAssembly. Your video, audio, or image files stay on your device—we never receive them.
Is browser-based editing private?
Yes. Processing happens locally on your machine. Nothing is sent to NanoPix servers for encoding or storage.
Is this tool free?
Yes. NanoPix tools are free to use in a modern browser. No account is required for basic editing and export.