Audio Editor — Multitrack, Join and Normalize Audio Locally

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Audio Editor max 1GB

Inspector audio/audio-editor

Audio Editor

Audio Tools · Runs in your browser

Stack a few audio tracks, put clips in order, even out their loudness and export one mixed file. Everything runs on your device.

MIXED
1GB max
batch
0 B out

Audio Editor

Overview

Stack a few audio tracks, put clips in order, even out their loudness and export one mixed file. Everything runs on your device.

Key features

Starts in the editor: drop several files and they arrive in file-name order
Stack tracks; clip order is the arrangement. Reorder by dragging, menu or keyboard
Sort a track's clips by name or date, and add exact gaps
Cut, copy, paste, fade, gain and silence across clips and tracks, with undo
Match clips to the same measured loudness, and normalize the mix
Restore your project from local storage; export one MP3 or 16/24-bit WAV

Set

Audio Tools 18

Neighbours

01 Audio Transcriber 02 Generate AI Music 03 Audio Converter 04 BPM Detector 05 DJ Booth 06 Extract Audio from Video

Specification

Command: audio.audio_editor
Set: Audio
Input: MIXED
Output: MIXED
Max file: 1GB
Batch: yes

MPEG WAV FLAC OGG AAC MP4 WEBM AIFF QUICKTIME X-MATROSKA X-MSVIDEO

Runtime

Engine: ffmpeg-wasm 0.12
Threads: — workers
Isolated: —
WebGPU: —
Memory: —

Transport 0 B

Your file is opened, worked on and saved inside this tab. This tool has no upload step, so your file has nowhere else to go.

Keys

Search: ⌘K
Panels: ⌘1 · ⌘2
Full width: F
All keys: ⌘/

How it works

Add audio

Drop files, open them, choose My files or record. Several files at once are ordered by file name. Each recording becomes a track of its own.

Arrange

A track plays its clips one after another; put anything that should play together on another track. Drag clips and tracks, or use the menus and Alt with the arrow keys.

Two tracks stacked on a timeline: a voice track of two clips over a quieter music track, with a selection across both and the measured mix loudness

Even out the loudness

Match clips measures each clip and shows the figures before and after. Normalize the whole mix to a target without exceeding the true-peak ceiling.

Computed before and after loudness and true peak, with both loudness curves and the target

Export the mix

Choose MP3 or WAV. Loudness and peaks are measured from the actual encoded file. Download it or save it to My files.

A finished 24-bit WAV export with actual encoded loudness, peak, duration and file size

Frequently asked

Does my audio leave this device?

No. Decoding, recording, editing, measurements and encoding run in your browser. The app loads its own code and codecs; it never uploads your audio or fetches remote audio URLs.

How many tracks can I use?

Up to 8 tracks on a desktop and 4 on a phone, fewer when memory runs out. The editor names the file and the remaining time when it has to refuse one.

Does the order of the tracks change the sound?

No. Track order is only how they are listed. What you hear is the sum of all tracks that are not muted, or only the soloed ones.

Can I continue after closing the page?

When local storage is available, the editor saves the current project on this device. Continue restores its tracks, clips and edits; undo history starts fresh. Clearing browser data removes it, so download your finished work.

Keys

Search: ⌘K
Panels: ⌘1 · ⌘2
Full width: F
All keys: ⌘/

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