Aspect Ratio Crop

Crop to popular ratios: square, 4:3, 16:9 and portrait.

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Click or drag image here

JPG, PNG, WebP supported · Max recommended 25MB

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About this tool

Crop your photo to any standard aspect ratio online for free with ResizerPhoto. Choose from 1:1, 4:3, 16:9, 3:2 and more preset ratios for Instagram, YouTube, Facebook and other platforms. The crop is automatically centered for best results.

Key features

Multiple preset aspect ratios
Auto-centered crop for best composition
Outputs at full quality
Works with JPG, PNG and WebP
Browser-based — no server upload
Free with no limits

Common uses

Crop to 16:9 for YouTube thumbnails and video
Crop to 1:1 square for Instagram posts
Crop to 4:3 for standard photo printing
Crop to 9:16 for Instagram Stories and Reels
Prepare images at the correct ratio for any platform

How it works

Aspect Ratio Crop lets you choose exactly which part of the photo to keep — everything outside the selection is discarded permanently in the downloaded file, so it's worth previewing the selection carefully before downloading. Because the crop works on the original resolution, the kept area stays as sharp as the source photo.

Tips for best results

Decide on the final aspect ratio before you crop so you don't have to redo it for a different platform.
Leave a little breathing room around the subject — you can always crop tighter later.
For faces, keep eyes roughly on the upper third of the frame for a natural-looking portrait.
Check the crop preview at actual size, since small crops can look different when scaled up.

Frequently asked questions

What aspect ratios are available?

Common ratios including 1:1, 4:3, 3:2, 16:9 and 9:16 are available. These cover the most common social media and print requirements.

Will the crop cut off part of my image?

Yes. Cropping to a specific ratio will remove parts of the image that fall outside the target ratio. The crop is centered to keep the main subject.

What is the difference between cropping and resizing?

Cropping removes pixels outside a selected area. Resizing changes the image dimensions without removing content.

What aspect ratio should I use for Instagram?

1:1 for feed posts (square), 4:5 for portrait posts, 9:16 for Stories and Reels.

What ratio is best for YouTube thumbnails?

16:9 is the standard aspect ratio for YouTube thumbnails and video content.

Can I crop to a custom size that isn't a preset?

Yes, you can set your own crop dimensions in addition to the common presets offered.

Does cropping reduce image quality?

Cropping itself doesn't reduce quality — you keep the original pixels for the area selected, just remove the rest.

Can I undo a crop and start over?

Yes, you can upload the original image again at any time to start with a fresh crop.