Quick answer
To download a TikTok video in HD, paste a public link and choose the HD MP4 button when that quality is available.
When image quality matters, start from a clean public TikTok URL and compare the detected video outputs before downloading.
When a real HD version exists
The final quality always depends on the source uploaded to TikTok. If the original post is already compressed, the HD output cannot exceed that source quality.
- The link must point to a public TikTok video.
- HD means a sharper source was actually detected.
- Removed or private videos expose no usable format.
How to avoid TikTok link errors
Most failures come from profile links, incomplete redirects or posts that are no longer public.
- Copy the URL again from TikTok's share button.
- Check that the video still opens in a browser without a special login.