Image Resize
Image
Drop an image, set the new width and height (with optional aspect-ratio lock), choose the output format and quality, then download the result. Everything runs through a Canvas in your browser, so the image never leaves your device.
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How to use
- Drag and drop an image, or click the box to choose one.
- Adjust width and height. Keep the lock on to preserve aspect ratio.
- Pick PNG (lossless), JPEG, or WebP and set a quality if needed.
- Download the resized image.
Frequently asked questions
- Is my image uploaded anywhere?
- No — it stays in your browser. Resizing runs on a local HTMLCanvasElement and the download is generated from a Blob in memory.
- What's the best format?
- Use PNG for screenshots and graphics with sharp edges, JPEG for photos, and WebP when you want the smallest file size and modern browser support.
- Why does my resized file look soft?
- Browsers use bilinear/trilinear sampling for canvas scaling. For very large downscales, resize in two or three steps for sharper results.
- How big an image can I process?
- Most browsers cap canvases at around 16,384 px per side and roughly 4096×4096 on iOS Safari. Very large images may fail silently or look truncated.
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