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Toolmigo

Image Resizer

Resize images to any width and height. Pixel or percentage modes, presets for social. No uploads — runs entirely in your browser.

100% Private

Files never leave your browser

Instant

No waiting, no uploads

No Limits

Any file size, unlimited files

Drag & drop image

JPG, PNG, WebP, GIF, BMP

px

Preview

Why Resize Images?

Social Media

Hit Instagram, X or LinkedIn dimension specs in one click.

Faster Page Loads

Shrink huge phone-camera photos before uploading to a website.

Email & Forms

Bring oversized images down to fit attachment or upload limits.

About Image Resizer

Image Resizer changes the pixel dimensions of an image. Width and height are locked to the source aspect ratio by default — type a new width and the height adjusts to keep the image undistorted. Resampling uses the browser's high-quality canvas interpolation, so downscaled output stays visually clean.

Resizing changes dimensions; it isn't the same as compressing to a specific file size. If you need to hit a 100 KB target rather than a pixel target, use Image Compressor instead — it adjusts JPEG quality to fit a size goal. Upscaling beyond the source resolution will look soft, since the resizer can't invent detail that wasn't captured.

Common Questions

Pixels lets you set exact dimensions like 1920×1080. Percentage scales relative to the original — 50% halves both dimensions, 200% doubles them. Use percentage when you want to shrink proportionally without doing the math.

Yes for almost everything — unlocking it stretches or squashes the image. The only time to unlock is when you need to fit an exact non-matching size (e.g. forcing a portrait photo into a square avatar slot, where you'd usually want to crop instead).

Downscaling is essentially lossless visually — modern browsers use high-quality interpolation, so the result looks clean. Upscaling beyond the source resolution adds blur, since pixels are invented; for serious upscaling, use AI-based tools, not a browser resizer.

Keep the original format if you're unsure. Switch to JPG when you want a smaller file (lossy compression), PNG to preserve transparency, or WebP for the smallest file at comparable quality on modern browsers.

Resizing changes pixel dimensions; compressing targets file size. For a specific KB target, use Image Compressor instead — it adjusts JPEG quality to land within your size goal.

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Wondering whether a file tool uploads your file? Here is the ten-second test, and it works on any of them.