Instagram portrait post size
1080×1350 pixels (0.80:1). 4:5 takes up more vertical space in the feed than 1:1, which means more screen time before a viewer scrolls past.
- Width
- 1080 px
- Height
- 1350 px
- Recommended format
- JPEG or PNG
Resize your image to exactly this
Batch is unlimited and free - every image is processed on your device, so there is no queue and no daily cap.
Dimension guidance reviewed 12 September 2026 · how we check this
Frequently asked
What size should a Instagram portrait post be?
1080×1350 pixels. 4:5 takes up more vertical space in the feed than 1:1, which means more screen time before a viewer scrolls past.
What file format should I use?
JPEG for photographs and PNG where you need transparency or crisp text. This tool outputs JPEG at high quality.
Do I have to upload my image to use this?
No. The resize runs in your browser using the canvas API - the image never leaves your device, and there is no daily limit.
Koldflux exports covers and carousel slides already sized correctly for every channel you publish to.
Automate this in Koldflux