Bluesky Image Resizer

Resize posts against Bluesky’s current 2,000,000-byte image budget and 4,000px app limit, prepare profile assets against their separate 1,000,000-byte schema ceiling, preview up to four-image gallery layouts, and generate exact aspect-ratio metadata — all locally.

Current byte rulesPosts target exactly 2,000,000 bytes; avatar/banner assets target exactly 1,000,000 bytes.

AT Protocol inspectorShows ratio metadata, MIME compatibility, max dimension and exact byte-budget usage.

4-image gallery labPreview one, two, three or four-image feed arrangements without claiming every client uses identical geometry.

Free precision exportNo signup, watermark, server upload or premium resize gate.

1. Source image

local only

Drop or paste an imageJPEG, PNG, WebP, AVIF or GIF · max 80 MB

Choose image

SourceDemo image

Pixels—

Filegenerated

2. Bluesky format

reviewed 25 Sep 2026

3. Composition

Resize mode

Zoom 100%

Horizontal focus 50%

Vertical focus 50%

Rotation

Background

Flip horizontal Flip vertical

Show conservative text-safe guide Show profile-circle guide

4. Bluesky post metadata

optional helper

Alt text

Gallery preview

Alt text length

5. Export

Format

JPEG/WebP quality 92%

Transparent PNG/WebP background Auto-target exact byte ceiling for JPEG/WebP; verify PNG

Base filename

Engine diagnostics · running…

All resizing, compression and ZIP creation happen locally. Re-encoding also strips source EXIF/GPS metadata, matching Bluesky’s recommendation that clients sanitize image metadata before upload.

Post · high-res square

2000 × 2000 · 1:1 · practical high-resolution post canvas

Drag image to reposition · guides are preview-only

Output2000 × 2000

Aspect ratio1:1

Byte ceiling2,000,000 B

Max dimension2,000 / 4,000 px

Source quality—

1 Bluesky output selectedSelect multiple presets to export a complete post/profile pack using the same focal point.