How to add your own audio to a TikTok

TikTok has no “upload an MP3” button. This trips up a lot of people, because every other part of the app implies that adding your own audio should be as easy as adding your own video. It is not, and the reason is deliberate: TikTok wants audio to live in its Sounds library, where it can be attributed, reused, and moderated.

The workaround has been the same for years. You attach the audio to the video before TikTok ever sees it.

The method that works

1. Download the clip you want as an MP3. On this site that is the download icon on any sound page.
2. Open a video editor that runs on the same device as TikTok. CapCut is the obvious choice because it is made by the same company and exports in a format TikTok never re-encodes badly, but InShot, VN, or your phone’s built-in editor all work.
3. Import your video, then import the MP3 as a separate audio track.
4. Line the sound up where you want it. If you are cutting to a beat, do this before you do anything else — moving a cut is easy, moving a sound that other cuts depend on is not.
5. Export the video with the audio baked in.
6. Upload that exported file to TikTok as a normal video post.

That is it. TikTok treats the baked-in audio as part of the video, so it plays exactly as you mixed it.

The catch nobody mentions

Your audio will not become a reusable TikTok Sound. Nobody can tap the spinning record and make their own video with it, because as far as TikTok is concerned there is no separate sound — there is a video that happens to have audio in it.

If you specifically want a reusable sound, the route is different and considerably more annoying: post the clip once as a video, and TikTok will generate an “original sound” entry attributed to your account, which other people can then use. You are publishing a post you may not want in order to create a library entry.

Why your audio sounds quieter after you post

This one causes a lot of confusion. You export a video that sounds punchy, upload it, and the playback on TikTok sounds flatter and quieter than what you exported.

TikTok applies loudness normalisation. So does YouTube, Instagram, and effectively every platform that plays audio in a feed — it exists so that scrolling from one video to the next does not blow your ears out. The platform measures the perceived loudness of your upload and turns the whole thing down if it is above the target.

The practical consequence: pushing your export as loud as possible does not make you louder on the platform, it just makes you more compressed after the platform turns you down. A heavily-limited mix that measures the same as a dynamic one will sound worse, not bigger.

Getting the sound to sit right

The most common mistake with meme audio in short-form video is playing it at the same level as the voice. A sound effect that is competing with dialogue reads as noise; the same effect six to ten decibels below the dialogue reads as punctuation.

The exception is a hard punchline, where the sound is the content — a reaction sound landing on a beat of silence, for instance. There, let it be loud and let the dialogue stop. Silence around a sound does more for its impact than volume ever will.

Before you post it

If your video is monetised or on a brand account, it is worth knowing whether the clip you just used is an excerpt of someone’s recording. TikTok’s automated matching is good and getting better, and the failure mode is usually a muted video rather than a warning. We have written up how to think about that in more detail.