Resize to 800px wide
width = 800height =lockRatio = 1
Result: Upload an image and set width to 800px. Height auto-adjusts to maintain aspect ratio.
Image Resizer
Resize JPG, PNG, and WebP images to custom dimensions. Lock aspect ratio to prevent distortion. Specify width, height, or both. All processing happens locally in your browser — no uploads.
Privacy: this tool processes your data entirely in your browser. Nothing you paste or type is sent to the server.
Enter your values and press Calculate — the result appears here.
Worked examples
Frequently asked questions
Is my image uploaded anywhere?
No. Resizing happens entirely in your browser using the Canvas API. Nothing is transmitted.
What if I only enter width or height?
With aspect ratio locked, entering one dimension auto-calculates the other to prevent distortion.
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