OVERLAY CROP GUIDE
Aspect Ratio vs Resolution: What Is the Difference?
Updated June 19, 2026
Aspect ratio describes shape. Resolution describes pixel dimensions. Knowing the difference is essential when cropping several files for the same layout.
Aspect ratio describes proportions
A 4:5 image could be 800 × 1000, 1080 × 1350, or 2400 × 3000 pixels. All have the same shape because width and height keep the same relationship.
Resolution describes pixel count
Resolution affects how much detail is available. Enlarging a small source to a large output does not create real detail; it only interpolates additional pixels.
Why matching both matters
For before-and-after sliders or carousels, matching only the ratio prevents shape differences, while matching both ratio and dimensions prevents layout shifts and inconsistent file handling.
A practical decision rule
Choose the ratio for the destination first, then choose an output size appropriate for that destination. Avoid enlarging far beyond the smallest original unless you accept softer detail.
FAQ
Can two 4:5 images have different quality?
Yes. They can share the same proportions while containing very different numbers of pixels.
Does changing resolution change the crop?
Not necessarily. The crop composition can remain the same while the exported pixel dimensions change.
Overlay image crop editor
Upload your original and edited photos, lower the top image opacity, then align facial features or fixed background points. Every exported image uses the same crop ratio and pixel dimensions.
Start cropping