Multi-image frame (practical)
Recommended1080×1440 3:4
Practical portrait for multi-image posts—feeds often crop multi cells toward ~3:4.
Use in toolBluesky · Image size
Bluesky Multi-Image Size
Bluesky multi-image posts often crop toward ~3:4. Export 1080×1440 frames, keep subjects centered, then download each photo in your browser.
Browser crop · stays on your device
Crop your Bluesky multi-image frame
1080 × 1440
Add a photo to crop
Upload a photo—or try the sample—then keep faces centered inside the margin before you download.
Size specs
This is a multi-image cell habit—not the wide ~16:9 single timeline card. Single and multi crops differ; export on purpose for the layout you will attach.
Publish
Export this for Bluesky upload.
Square reference (single habit)
1080×1080 1:1
Square reference when you compare habits—not a substitute for ~16:9 single timeline cards.
Use in tool| Asset | Pixels | Ratio | Notes | Action |
|---|---|---|---|---|
| Multi-image frame (practical) Recommended | 1080×1440 | 3:4 | Practical portrait for multi-image posts—feeds often crop multi cells toward ~3:4. | Use in tool |
| Square reference (single habit) | 1080×1080 | 1:1 | Square reference when you compare habits—not a substitute for ~16:9 single timeline cards. | Use in tool |
Multi-image grids crop tighter than single cards
On Bluesky, one photo often sits as a wide ~16:9 timeline card. Attach two or more and many clients show tighter cells—commonly toward about 3:4. A practical 1080×1440 export keeps faces and products inside that tighter window instead of losing edges that looked fine as a single widescreen.
This page is honest about the gap: there is no single official “one pixel” mandate for every client. Treat 1080×1440 as a practical multi-image habit, and use the square preset only as a compositional reference—not as a replacement for the dedicated single-post ~16:9 guide.
Center what matters. A subject glued to the far left of a single-image crop can vanish when the grid tightens. Keep similar subject scale across the set so the gallery feels intentional.
Threads and Instagram carousels lean on 4:5 swipe stacks. Bluesky multi-image is a grid job first—re-crop when you cross-post instead of stretching a Meta carousel into a Bluesky cell.
Good vs weak crop
Same feed frame—keep the subject inside the margin phones actually show.
Centered 3:4 multi set
- True 1080×1440 each frame
- Subjects centered for grids
- Consistent scale across set
- Hook readable on first cell
Edge subjects or wide leftovers
- Widescreen single forced into grid
- Faces on the extreme edge
- Random aspect per attach
- Micro text nobody can read
Before you upload
Tick these off against your crop preview—nothing is saved.
Related surfaces compared
Similar-looking slots often use different ratios—do not reuse one export for all of them.
Multi-image frame
1080 × 1440
This page. Practical ~3:4 cell habit.
Single timeline photo
1200 × 675 (~16:9)
Wide single card—different crop job.
Square reference
1080 × 1080
Optional habit check in the tool.
Profile banner
3000 × 1000 typical
Wide header—not a gallery cell.
| Surface | Typical size | Note |
|---|---|---|
| Multi-image frame | 1080 × 1440 | This page. Practical ~3:4 cell habit. |
| Single timeline photo | 1200 × 675 (~16:9) | Wide single card—different crop job. |
| Square reference | 1080 × 1080 | Optional habit check in the tool. |
| Profile banner | 3000 × 1000 typical | Wide header—not a gallery cell. |
Order the gallery like a short story
People often glance once. Lead with the strongest frame, keep middle images one idea each, and avoid stuffing CTAs into a clipped corner of the last cell.
- First: clearest subject or claim.
- Middle: detail or proof—one idea each.
- Last: quiet CTA inside the margin.
- Match center-weighted framing across the set.
Multi-image vs single post vs Meta carousels
A single Bluesky photo usually wants the wide ~16:9 post guide. A multi-attach gallery wants this tighter ~3:4 habit. Instagram/Threads carousels are swipe stacks at 4:5—re-crop when you move assets across apps.
- Bluesky post size — 1200 × 675 single card
- Threads carousel — 1080 × 1350 swipe stack
- Bluesky hub — Post, banner, multi-image
File requirements
Export 1080×1440 per multi-image frame in sRGB. Keep subjects inside the safe margin. Use the square preset only to compare composition—not as a silent stand-in for single ~16:9 posts.
- Primary multi size
- 1080 × 1440 px (3:4)
- Square reference
- 1080 × 1080 px
- Single post (separate)
- ~1200 × 675 (~16:9)
- Formats
- JPG photos; PNG flat
- Multi rule
- Center subjects for tighter cells
- Best for
- Bluesky multi-image posts
Common mistakes
- Assuming single ~16:9 and multi ~3:4 are the same crop.
- Leaving faces on the far edge of a widescreen master.
- Mixing wildly different aspect ratios in one attach set.
- Stretching an Instagram 4:5 carousel without a fresh Bluesky crop.
- Packing unreadably small paragraphs onto every cell.
How to use the crop tool
Upload each photo, keep Multi-image frame (1080×1440) selected, drag until the subject sits centered in the safe margin, then download. Repeat for the full set.
- Switch to Square only to compare habits—not mid-upload confusion.
- Prefer JPG for photographs.
- Upload the set on Bluesky yourself.
After you download
From this download to a live upload in a few minutes.
- 1
Download each 1080×1440 frame (JPG for photos, PNG for flat graphics).
- 2
On Bluesky, compose a post and attach the images in order.
- 3
Put detail in the post text—not as microscopic type on every cell.
- 4
Preview on a phone: confirm faces survive the multi-image grid.
- 5
If a subject clips, recenter inside the margin and replace that frame.
Frequently asked questions
What size should Bluesky multi-image photos be in 2026?
A practical size is 1080×1440 (3:4) per frame. Feeds and clients often crop multi-image cells tighter than a single widescreen card.
Why is multi-image different from a single Bluesky post?
Single posts commonly read as wide ~16:9 cards. Multi-image layouts often tighten toward ~3:4. Re-crop for the layout you will actually attach.
Is 1080×1080 enough for Bluesky multi-image?
Square can work as a compositional reference, but 1080×1440 better matches the taller multi-cell habit. Prefer 3:4 when faces must survive the grid.
Can I reuse an Instagram or Threads carousel on Bluesky?
Reuse the photo, not the finished Meta 4:5 export blindly. Re-crop toward 1080×1440 and preview the Bluesky grid.
Can I crop Bluesky multi-image frames here?
Yes. Crop each frame in the browser, then attach the set on Bluesky yourself.