How to Resize Images for Instagram Without Losing Quality
The exact pixel dimensions and aspect ratios for every Instagram post type in 2026, plus a step-by-step guide to resizing images perfectly for the feed, Stories, and Reels.
Instagram compresses every image you upload. Upload the wrong size and the compression is brutal — blurry edges, crushed shadows, color shifting. Upload the right size and Instagram's compression is nearly invisible. This guide gives you the exact dimensions and a workflow to make every Instagram post look sharp.
Instagram Image Dimensions in 2026
| Format | Dimensions | Aspect Ratio | Notes |
|---|---|---|---|
| Feed — Square | 1080 × 1080 px | 1:1 | Classic post format, works everywhere |
| Feed — Portrait | 1080 × 1350 px | 4:5 | Takes more screen space, higher engagement |
| Feed — Landscape | 1080 × 566 px | 1.91:1 | Wide panoramic images |
| Stories | 1080 × 1920 px | 9:16 | Full-screen vertical format |
| Reels | 1080 × 1920 px | 9:16 | Same as Stories, vertical video |
| Carousel post | 1080 × 1080 px | 1:1 | All slides must be the same ratio |
| Profile photo | 320 × 320 px | 1:1 | Displayed as circle, use 320px minimum |
Why Getting the Size Right Matters
Instagram's algorithm favors content that keeps people on the app. Portrait posts (4:5 ratio at 1080 × 1350 px) take up more vertical screen space, which research consistently shows increases time-on-post and engagement. Using the correct dimensions also prevents Instagram from auto-cropping your image in unexpected ways.
- Wrong size = Instagram crops or letter-boxes your image automatically
- Oversized images get compressed harder, causing more visible artifacts
- Portrait ratio (4:5) gets more feed real estate and typically higher engagement
- Undersized images get upscaled by Instagram, making them blurry
- Correct sizing gives you full control over how your content appears
Step-by-Step: Resize for Instagram Feed Posts
- Open Convertly Tools' Resize Image tool.
- Upload your original photo.
- Select the Instagram preset or enter 1080 × 1350 for portrait (recommended), 1080 × 1080 for square.
- Enable Aspect Ratio Lock if your source image needs cropping — use the Crop tool first.
- Click Resize & Download.
- Compress the resized image using the Compress Image tool at 85% quality before uploading to Instagram.
Always resize to exactly 1080px wide. Instagram's internal processing uses 1080px as its display standard — sending a larger image just means Instagram compresses it down anyway, often with worse results than doing it yourself.
Resizing for Instagram Stories and Reels
Stories and Reels are vertical (9:16), while most photos are horizontal (3:2 or 16:9). The workflow is to first crop to 9:16, then resize to 1080 × 1920 px. Using Convertly Tools' Crop tool lets you choose exactly what part of the photo to show.
- Open the Crop Image tool and upload your photo.
- Select the 9:16 aspect ratio preset.
- Drag the crop box to frame the most important part of your image.
- Click Crop & Download.
- Open the Resize Image tool and resize the cropped image to 1080 × 1920 px.
- Compress at 85% quality before uploading.
Instagram Compression: How to Fight It
Instagram always re-compresses uploaded images — this is unavoidable. The goal is to give Instagram the best possible input so the compressed output looks good. Several factors help:
- Upload JPEG at 85–90% quality — lower quality inputs compress worse
- Avoid uploading already-compressed images (don't compress twice)
- Use the exact recommended dimensions — oversized means more compression
- Avoid heavy noise, fine grain, or very busy backgrounds — these compress poorly
- Turn off iPhone 'Save Space' modes that reduce photo quality before sharing
- Upload over Wi-Fi — Instagram may apply heavier compression on cellular
The Quick Instagram Workflow
- Crop to the right aspect ratio (Crop tool — 4:5, 1:1, or 9:16).
- Resize to the correct pixel dimensions (Resize tool — 1080px wide).
- Compress at 85% JPEG quality (Compress Image tool).
- Upload to Instagram — your image is now optimized for minimal compression.
Use Convertly Tools' free Resize and Crop tools to prepare perfect Instagram images.
Resize & Crop Images Free