How do I overlap two audio files?

Upload both audio files and click Process. The tool mixes them together so both tracks play simultaneously.

What's the difference between joining and overlapping?

Joining (combine) plays files one after another. Overlapping (mix) plays them at the same time, layering the sounds together.

Can I overlap two songs so they play at the same time?

Yes - add both files and they are layered, not queued. Drop one song's volume to roughly 30-50% so the other stays in front, otherwise the two compete and the mix sounds muddy.

Why does the overlapped audio sound distorted or crackly?

Both tracks are kept at their own level, so loud passages can add up past digital full scale and clip. Lower one track's volume before processing, or run the result through Normalize Audio .

Overlap Audio Files Online Free — Layer & Mix Tracks

Overlap Audio Files

Overlap two audio files so they play at the same time. Layer music, voiceovers, and sound effects together. Free, private, browser-based audio overlapper.

Overlapping audio files means playing two or more tracks at the same time in a single file — background music under narration, ambience under dialogue, stacked vocal takes. EditClips.online overlaps audio directly in your browser: add the files, balance each track's volume and timing, click Process, and download the mixed result as MP3, WAV, AAC, FLAC, or OGG. Nothing uploads to a server, and no sign-up is needed.

How to Use Overlap Audio Files

Upload the first audio track (e.g. vocals or main audio)
Upload the second audio track (e.g. background music or sound effects)
Click Process to mix both tracks together
Download the mixed audio file

Features

Mix two audio tracks to play at the same time
Perfect for background music, sound effects, or layering
Supports MP3, WAV, AAC, FLAC, and OGG
Free and private — no server upload

Quick Facts

Each track keeps the level you set instead of being divided by the number of tracks, which is the default behavior for a mixer and would drop 2 layered tracks to 50% each.
The exported file is as long as the longest track, so a 20-second effect layered over a 3-minute song gives a 3-minute result.
Two tracks played at full level sum together and can pass 0 dBFS, the loudest value a digital file can hold, which is what clipping sounds like. Source

Which Tool Do I Need?

Overlap Audio Files layers tracks so they play at the same time. If you want them one after another instead, use Combine Audio - that joins end to end. Mix Audio is the same engine with a timeline, so reach for it when a track needs to start late or be trimmed. To put audio onto a video rather than onto another audio file, use Add Audio.

Frequently Asked Questions

How do I overlap two audio files?: Upload both audio files and click Process. The tool mixes them together so both tracks play simultaneously.
What's the difference between joining and overlapping?: Joining (combine) plays files one after another. Overlapping (mix) plays them at the same time, layering the sounds together.
Can I overlap two songs so they play at the same time?: Yes - add both files and they are layered, not queued. Drop one song's volume to roughly 30-50% so the other stays in front, otherwise the two compete and the mix sounds muddy.
Why does the overlapped audio sound distorted or crackly?: Both tracks are kept at their own level, so loud passages can add up past digital full scale and clip. Lower one track's volume before processing, or run the result through Normalize Audio.