TikTok Post Preview
Write your caption, drop in an image and see the TikTok feed version on the right. A TikTok post is a 9:16 video with your username, caption and sound overlaid at the bottom left, and the like, comment, save and share rail on the right. Captions truncate after about 90 characters until tapped. Toggle dark mode and desktop to check both, then schedule it when it looks right.
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The card follows TikTok's current layout, including where "more" cuts the text. Real feeds vary slightly by device and app version.
What the TikTok feed does to your post
A TikTok post is a 9:16 video with your username, caption and sound overlaid at the bottom left, and the like, comment, save and share rail on the right. Captions truncate after about 90 characters until tapped.
TikTok captions are searchable, so the keyword goes in the first sentence. A question or a "part 1" framing pulls comments; the rest of the caption is for hashtags and credits.
How to use the preview
- Enter your name and paste your caption.
- Add an image or your profile photo: both stay in your browser.
- Switch between light and dark and between mobile and desktop widths.
- Click "more" on the preview to see the expanded version, then copy the text or send it to the scheduler.
Why preview before posting
Most engagement decisions happen before the fold. If the first line is a half-sentence or the image crops off a face, the post underperforms and there is no edit that fixes it after the first hour. Previewing is a ten-second check that catches both. Social by InstantDM shows the same preview for all eight platforms side by side inside the composer.
TikTok character limits (2026)
| Field | Limit | Note |
|---|---|---|
| Caption | 4,000 | Only the first line shows without tapping |
| Bio | 80 | |
| Display name | 30 | |
| Username | 24 | |
| Comment | 150 | |
| Video title (LIVE) | 32 | |
| Text overlay | No published limit | No hard limit; keep to a few words per line |
TikTok image sizes (2026)
| Placement | Size (px) | Ratio |
|---|---|---|
| Video / photo post | 1080 × 1920 | 9:16 |
| Carousel photo | 1080 × 1920 | 9:16 |
| Profile photo | 200 × 200 | 1:1 |
Need one of these sizes? Use the TikTok image resizer.
Frequently asked questions
How many characters show before "more" on TikTok?
Only the first line, around 90 characters, until the caption is tapped.
What image size does TikTok use?
Video / photo post: 1080×1920 (9:16). The full size list is on this page.
Is my image uploaded anywhere?
No. The preview renders in your browser; the image never leaves your device.
Is the preview pixel-exact?
It follows TikTok's current layout closely, but the real feed varies by device, app version and whether the account has hidden like counts. Treat it as a faithful approximation, not a screenshot.
Related free tools
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