Tested tool guide
Tested browser tools
Checked August 16, 2026
What TikTok Post Previewer does, with a checked example
You assemble a TikTok post the way the upload screen expects it: caption with hashtags, and the audio label that rides below it. The tool renders the whole thing inside a phone-frame For You feed mock, with the platform's own layout - username, two-line caption, link-styled hashtags, the audio ticker, and the right-side action rail - and overlays the safe zones where that UI covers the video frame. The surprise most people hit first: the feed shows only the first two lines of a caption, and the 2,200-character limit is the upload box, not what anyone sees in-feed.
Worked example
A concrete input and expected output from the current implementation.
Input
Caption: "10 things I wish I knew before starting my first garden #gardening #beginner #gardentips #diy #outdoors"
Audio label: Original sound - @gardenwithjo
Video: 9:16 portrait
->
Expected output
Character check: 103 of 2,200 - within limit. Hashtags: 5, rendered as link text. Feed preview: caption wraps to two lines, then a 'Show more' toggle; the audio label 'Original sound - @gardenwithjo' sits below the caption. Safe-zone guides mark the right action rail, the bottom caption block, and the top tab bar as covered areas of the video frame.
The body text is 55 characters and the hashtag segment is 48, so the whole caption is 103 characters - comfortably inside the 2,200-character upload limit. The preview still cuts it after two lines because in-feed truncation is independent of the limit.