Facebook Post Preview
Write your post, drop in an image and see the Facebook feed version on the right. Facebook shows a 1.91:1 link or image preview, roughly the first 400 characters and a "See more" fold. Reactions show as a stack of icons with a count, and the comment and share counts sit to the right. Toggle dark mode and desktop to check both, then schedule it when it looks right.
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The card follows Facebook's current layout, including where "more" cuts the text. Real feeds vary slightly by device and app version.
What the Facebook feed does to your post
Facebook shows a 1.91:1 link or image preview, roughly the first 400 characters and a "See more" fold. Reactions show as a stack of icons with a count, and the comment and share counts sit to the right.
Short posts win on Facebook. One idea, a plain first sentence, and the link in the post rather than the comments: Facebook stopped penalising links in 2023.
How to use the preview
- Enter your name and paste your post.
- 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.
Facebook character limits (2026)
| Field | Limit | Note |
|---|---|---|
| Post | 63,206 | Posts under 80 characters get the most engagement |
| Page intro / bio | 101 | |
| Page name | 75 | |
| Username | 50 | |
| Comment | 8,000 | |
| Ad primary text | 125 | Longer text is truncated in feed |
| Ad headline | 40 | |
| Event name | 64 |
Facebook image sizes (2026)
| Placement | Size (px) | Ratio |
|---|---|---|
| Feed post | 1200 × 630 | 1.91:1 |
| Square post | 1080 × 1080 | 1:1 |
| Story / Reel | 1080 × 1920 | 9:16 |
| Cover photo | 820 × 312 | 2.63:1 |
| Profile photo | 170 × 170 | 1:1 |
| Event cover | 1920 × 1005 | 1.91:1 |
Need one of these sizes? Use the Facebook image resizer.
Frequently asked questions
How many characters show before "more" on Facebook?
Roughly the first 400 characters or the first few lines, then "See more".
What image size does Facebook use?
Feed post: 1200×630 (1.91:1). 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 Facebook'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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