Click to upload or drag & drop a photo
Processed entirely in your browser — nothing is uploadedHow the crop is chosen
The tool keeps your photo centred and trims the excess from the longer side to reach the target ratio, so it never stretches or distorts the image. If an important part of your subject sits near the edge rather than the centre, crop it manually to your desired framing first using our crop tool, then set the ratio here.
How to use Change Image Aspect Ratio
- Upload the photo you want to edit.
- Adjust any sliders, colours, or options shown above the upload box — the preview updates as you go.
- Compare the before and after side by side.
- Download the edited photo once it looks the way you want.
Tips for best results
- Try a few different settings before downloading — most sliders here update the preview instantly, so it's quick to compare options.
- Work from your best-quality original; effects applied on top of an already-compressed photo tend to look rougher.
- If you're combining this with another tool (like compressing afterwards), apply this effect first, then compress last.
❓ Frequently asked questions
Can I apply this more than once to stack the effect?
Yes — download the result and re-upload it to apply the effect again, though stacking some effects can look over-processed quickly.
Does this work on PNG images with transparency?
Transparent areas are generally preserved unless the tool specifically converts to JPG, which fills transparency with white.
Will this stretch my photo out of shape?
No — it only crops (removes edges); it never stretches pixels, so proportions within the kept area stay accurate.
What ratio should I use for a YouTube thumbnail?
16:9 is the standard widescreen ratio used for YouTube thumbnails and most video players.
Can I crop to a ratio not in the list?
The presets cover the most common needs; for an exact custom ratio, our pixel resize tool combined with manual cropping gives full control.