Resize Images for Instagram Free Online
Resize images for Instagram — square post 1080×1080, portrait 1080×1350, landscape 1080×566, Story 1080×1920. Free online, no upload.
Instagram Image Sizes
All recommended Instagram image dimensions for 2026. Upload at these exact sizes to avoid any quality loss from platform-side scaling.
| Type | Width × Height | Aspect Ratio | Notes |
|---|---|---|---|
| Square Post | 1080 × 1080 px | 1:1 | Recommended for feed posts |
| Portrait Post | 1080 × 1350 px | 4:5 | Most space in feed |
| Landscape Post | 1080 × 566 px | 540:283 | 16:9 crop equivalent |
| Story / Reels | 1080 × 1920 px | 9:16 | Full-screen vertical |
How to Resize Images for Instagram
Open ResizePack, drop your image and select the Instagram preset that matches your post type (Square, Portrait, Landscape or Story).
Review the preview — use CropRatio to crop to the exact ratio first if your photo has the wrong proportions.
Click Resize, then Download. Your image is ready to upload directly to Instagram without any quality loss from re-compression.
Ready to resize?
Use ResizePack for batch resizing with social media presets, or CropRatio to crop to the exact aspect ratio first.
Frequently Asked Questions
What is the best Instagram image size in 2026?
For feed posts, 1080×1350 px (4:5 portrait ratio) gives you the most vertical space in users' feeds. For Stories and Reels use 1080×1920 px (9:16). Square posts are 1080×1080 px.
Will Instagram compress my photo if I resize it first?
Instagram always re-encodes uploads, but providing an image at exactly the right dimensions (1080 px wide) prevents Instagram from upscaling or downscaling before its own compression — resulting in the sharpest possible output.
What file format should I use for Instagram?
JPEG for photos (Instagram re-encodes everything anyway) and PNG for graphics with transparency. Keep file size under 30 MB. Use our Compress tool to reduce file size without visible quality loss.
Can I use the same image for a post and a Story?
You can, but you should resize separately. A 1080×1080 square will have black bars on a 9:16 Story canvas. Use ResizePack to export both sizes at once.
Complete Social Media Size Guide
Need dimensions for every platform in one place? Read our complete 2026 cheat sheet — every network, every format, updated for this year.
Social Media Image Sizes 2026