MP4 or MP3: which TikTok download format to pick
Most download buttons on a TikTok result do the same job at different sizes, and one of them does a different job entirely. Here is what each one is for.
MP4, no watermark — the default choice
This is the video as it was uploaded, without the bouncing logo and username TikTok adds to the copy from its own Save button. It is what you want in almost every case.
Its size depends on length and resolution, not on the watermark. Removing a watermark does not make a file smaller; taking a lower resolution does.
MP4, standard — when the HD file is too big
The same video at a lower resolution. Useful on a metered connection, on a phone that is nearly full, or when the video is going somewhere that will re-compress it anyway — a messaging app, a story, a slide in a deck.
Picking it costs detail you would only notice on a large screen. Paying for HD you are about to throw away costs you the download.
MP3 — the sound on its own
This extracts the audio track and discards the picture, which makes it dramatically smaller — usually under a megabyte for a short clip.
It is the right choice when you wanted the sound, not the video: a track to identify, a voice note, a snippet for editing. It is the wrong choice if you might want the picture later, because you cannot get it back from an MP3.
Why a watermarked option exists
Occasionally the clean file is not available and the watermarked one is. Offering it is more honest than showing nothing, as long as the button says which one you are getting.
It is also sometimes what you actually want. If you are reposting with credit, the watermark carries the creator’s username — which does the crediting for you.
What the file size next to a button tells you
It is the real size of the file you are about to fetch, read before the download starts. That matters on a limited data plan, and it is the one number a downloader can give you that a screen recording never can.
If two buttons show the same size, they are probably the same file behind different labels. If a button shows no size, the source did not report one — which is worth knowing before you start a large download on mobile data.
Frequently asked questions
Does removing the watermark make a video file smaller?
No. File size depends on length and resolution, not on the watermark. Choosing a lower resolution is what makes the file smaller.
When should I pick the standard MP4 instead of HD?
On a metered connection, on a nearly full phone, or when the video is going somewhere that will re-compress it anyway, such as a messaging app or a story.
Can I get the video back from an MP3 download?
No. The MP3 keeps only the audio and discards the picture, so pick it only when you want the sound and are sure you will not need the video later.