Image Resizer & Cropper
Resize and crop images to the aspect ratios creators actually need. Processing happens locally, so nothing is uploaded to a server.
Cropped from the centre, so nothing is stretched out of proportion.
Crop, do not squash
Forcing a 16:9 photo into a 9:16 frame by stretching it makes faces wider and text unreadable — and viewers notice immediately even when they cannot say why. This tool crops from the centre instead, so proportions stay correct and you lose the edges rather than the shape.
Design at the output size, not the source size
If a thumbnail is going to be displayed at 1280 by 720, judge it at that size. Text that reads comfortably on a 4,000-pixel original can vanish entirely once it is scaled down, which is the single most common reason a thumbnail underperforms.
Which format to pick
JPEG for photographs and anything with gradients. PNG when you need hard edges and flat colour to stay perfectly crisp, such as text-heavy graphics. WebP produces the smallest file of the three and is accepted everywhere that matters now — use it unless a specific upload form refuses it.
Common questions
Is my image uploaded to a server?
No. The file is decoded, cropped and re-encoded entirely by your own browser using a canvas. Nothing is transmitted, and there is no server involved in this tool at all.
What size should a YouTube thumbnail be?
1280 by 720 pixels at 16:9, kept under 2 MB. The 16:9 preset here outputs exactly that.
Why does my image get cropped rather than squashed?
Squashing distorts faces and text. This tool crops from the centre to reach the target ratio, which keeps everything in proportion — you lose edges rather than distorting the middle.
Does re-encoding lose quality?
A little, once. JPEG output is set to high quality, and PNG output is lossless. Avoid repeatedly re-processing the same file through any tool.