Does cropping reduce image quality?

No — it removes pixels from the edges rather than resampling the remaining ones, so the kept portion retains its original quality.

What format does the cropped image download as?

PNG — preserving quality without additional compression loss from the crop itself.

Can I crop each side by a different amount?

Yes — top, right, bottom, and left each have their own independent percentage, so you can recompose an image asymmetrically rather than only trimming evenly.

What happens if my margins add up to 100% or more on one axis?

The output doesn't error out — the crop region floors at a 1×1-pixel minimum rather than becoming invalid, so an extreme combination just produces a nearly blank, tiny image instead of a failure message.

Can I enter blank fields instead of a number?

Yes — each field starts pre-filled with 10%, but clearing one is treated as 0% trim on that side rather than an error, since a non-numeric value falls back to 0.

Will cropping change the image's aspect ratio?

Only if your horizontal (left/right) and vertical (top/bottom) trim percentages differ from each other — trimming both pairs equally keeps the original proportions; uneven trims change them.

Can I crop a very small image, like a 20×20 icon?

Yes — the same percentage math applies regardless of source size. Because the result floors at 1×1 pixel, even an aggressive trim on a tiny image produces a valid (if nearly blank) output rather than failing.

Does cropping preserve an image's existing transparency?

Yes — the crop only trims and redraws pixels, so an uploaded PNG's alpha channel carries through into the PNG output unchanged.

Image Cropper

About the Image Cropper

Trims an uploaded image's edges by percentage margins on each side, useful for removing borders, unwanted edges, or adjusting composition without needing precise pixel coordinates.

100% Free Runs in Your Browser No Sign-Up Required

How to use it

Upload an image.
Enter a Trim percentage for the top, right, bottom, and left edges.
Click Crop, then download the result.

Formula

Crop region = original dimensions minus the specified percentage margin from each side, then redrawn onto a canvas at the resulting smaller size.

Worked example

Trimming 10% from each side of a 1000×1000 image results in an 800×800 output, centered on the original middle 80%.

Recommendations

• Percentage-based cropping scales naturally to any image size, so the same settings work regardless of your photo's dimensions.
• Use uneven margins, like more from the top than the bottom, to recompose an image rather than just trimming it symmetrically.
• Preview before downloading — cropping is easy to redo by adjusting percentages and cropping again from the original upload.

Frequently asked questions

Not directly — this works in percentage margins for simplicity across any image size. Calculate the percentage equivalent of your target pixel coordinates first.

Related tools

Aspect Ratio Calculator