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Resize and compress images with live file-size preview.
🔒 100% client-side — resizing happens locally in an in-browser canvas with high-quality smoothing. The size shown is the real encoded output, measured with canvas.toBlob.
Need a photo at exactly 1200×630 for a social card, an avatar at 256×256, or a product shot at half size? This resizer scales any image to the dimensions you type, right in the browser. It redraws the image in a local canvas with high-quality smoothing, shows you the real encoded file size before you download, and never uploads anything — the file never leaves your device.
With the lock on, changing the width recomputes the height from the original proportions — and vice versa — so the image never stretches. Turn it off only when you genuinely need to distort, or when you plan to crop later. The 25% / 50% / 75% / 100% buttons are the fastest way to shrink for email, thumbnails, or srcset variants without doing any math.
Most resizers guess at the output size; this one actually re-encodes the image in a hidden canvas as you type (debounced, so it stays snappy) and reports the exact byte count from canvas.toBlob. The preview thumbnail is the actual encoded output too — what you see is literally what you download. If the result is bigger than you hoped, drop the quality slider or switch to WebP before exporting.
Canvas resampling is excellent at making images smaller, but enlarging beyond the original dimensions just invents pixels — expect softness. For crisp results, start from the largest source you have and scale down. Also note that transparency is preserved in PNG and WebP output, while JPEG flattens it to black; pick PNG or WebP for logos and cut-out artwork.
The Image Resizer handles image resizerdirectly in your browser. Paste or type your input, and the tool processes it instantly — no upload, no signup, no waiting. It's built for the moments when you need a quick transformation and don't want to leave your workflow.
Because the tool runs client-side, it's fast and private. Your text never touches a server, which makes it safe for sensitive content. The interface is keyboard-friendly and works on any device with a modern browser.
Common uses: people reach for this tool when they need to use a resize image to exact pixels online, image resizer with aspect ratio lock, compress image to target size, or resize photo without uploading.
Browser-based tools like this one have a few real advantages over installed software or manual methods:
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