What aspect ratio is best for Instagram?

For maximum feed coverage on mobile: 4:5 portrait (1080×1350px). For universal compatibility: 1:1 square (1080×1080px). Stories and Reels: 9:16 vertical (1080×1920px). Instagram crops anything outside these ratios, so match them precisely.

What is the difference between aspect ratio and resolution?

Aspect ratio is the width-to-height relationship (e.g., 16:9). Resolution is the actual pixel count (e.g., 1920×1080). Two images can have the same aspect ratio but different resolutions.

Will using the wrong aspect ratio hurt my reach?

Yes. Wrong ratios cause platforms to auto-crop your image, cutting out faces, text, or key subjects. On Instagram specifically, portrait format (4:5) typically gets more engagement because it takes up more vertical screen space in the feed.

Can I crop to custom aspect ratios?

Yes. FileCrisp supports freeform cropping where you can set any dimensions you need, in addition to the standard 1:1, 4:3, and 16:9 presets.

Image ToolsMay 20266 min read

Best Aspect Ratios
for Every Platform.

Post the wrong ratio and your image gets auto-cropped in unexpected ways. Here's the exact ratio for every major use case — plus how to crop to any of them for free.

1:1 (Square)

Instagram posts, profile photos, product images

Universal — works everywhere

4:5 (Portrait)

Instagram portrait posts

Highest feed coverage on mobile

16:9 (Widescreen)

YouTube thumbnails, OG images, Twitter cards

Standard for video and links

9:16 (Vertical)

Stories, Reels, TikTok, Shorts

Full-screen mobile experience

Crop to Any Ratio Free

Key ratios to know

1:1 · 4:5 · 16:9 · 9:16 cover 95% of use cases

Instagram minimum px width

Never post below 1080px wide

Files uploaded to crop

Cropped entirely in your browser

Pro tip

Shoot once, crop many: Always shoot (or export) at the highest resolution and most portrait aspect ratio you need. Then crop to each required ratio from that master. Never crop down from an already-cropped version.

Crop your image to any platform ratio — free

1:1, 4:5, 16:9, 9:16, and custom. No Photoshop, no upload.

Free forever

No uploads · 100% private

Crop Image Free

FAQs

Frequently Asked Questions

Everything you need to know — answered plainly.

Crop Images Free — Any Ratio

Perfect aspect ratios for every platform. Free, private, browser-based.

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Files stay on your device

Instant results

Best Aspect Ratiosfor Every Platform.