Bluesky Post Preview
Write your post, drop in an image and see the Bluesky feed version on the right. A Bluesky post shows your display name, handle and time, up to 300 characters, images at 3:2, and the reply, repost and like row with counts. Toggle dark mode and desktop to check both, then schedule it when it looks right.
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The card follows Bluesky's current layout, including where "more" cuts the text. Real feeds vary slightly by device and app version.
What the Bluesky feed does to your post
A Bluesky post shows your display name, handle and time, up to 300 characters, images at 3:2, and the reply, repost and like row with counts.
Bluesky is conversation-first. Posts that start a thread or ask a question do better than broadcasts.
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.
Bluesky character limits (2026)
| Field | Limit | Note |
|---|---|---|
| Post | 300 | Counted in graphemes, so emoji count as 1 |
| Display name | 64 | |
| Bio | 256 | |
| Handle | 253 | A domain name, e.g. name.bsky.social |
| Alt text | 2,000 | |
| Images per post | 4 |
Bluesky image sizes (2026)
| Placement | Size (px) | Ratio |
|---|---|---|
| Post image | 1500 × 1000 | 3:2 |
| Square post | 1000 × 1000 | 1:1 |
| Profile photo | 1000 × 1000 | 1:1 |
| Banner | 3000 × 1000 | 3:1 |
Need one of these sizes? Use the Bluesky image resizer.
Frequently asked questions
How many characters show before "more" on Bluesky?
Bluesky shows the whole post up to the 300-character limit.
What image size does Bluesky use?
Post image: 1500×1000 (3:2). 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 Bluesky'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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