A TikTok downloader is a software tool or online service that allows users to download TikTok videos onto their devices. These tools typically work by copying the video's URL from TikTok and pasting it into the downloader, which then retrieves the video file and saves it locally. This enables users to save TikTok videos for offline viewing or sharing on other platforms. However, it's important to respect copyright and privacy policies when downloading and sharing TikTok content.