ToolSink

Image Resizer

Resize any image to custom dimensions. Aspect-ratio lock supported.

What is the Image Resizer?

The Image Resizer changes the pixel dimensions of images to fit exact requirements — a website banner, a 600×600 ID photo or a 1080×1080 social post. Enter custom width/height or pick a preset, with an aspect-ratio lock to prevent stretching.

The tool runs in-browser, so ID photos and design work stay on your device.

How to use the Image Resizer

  1. 1Upload one or more images (JPG, PNG or WebP).
  2. 2Enter the target width and/or height, or pick a preset.
  3. 3Keep "lock aspect ratio" on to avoid distortion.
  4. 4Click "Resize" and download the results individually or as a ZIP.

Key features

  • Custom pixel dimensions with aspect-ratio lock
  • Presets for common social media and print sizes
  • Batch resize
  • Output as JPG, PNG or WebP

Important notes

  • Upscaling adds no new detail — a small image enlarged will look softer. Downscaling has almost no quality impact.

Frequently asked questions

Will resizing distort my image?

Only if you turn off "lock aspect ratio" and enter mismatched dimensions.

What is the maximum image size?

Whatever your browser can hold — typically up to 20,000 pixels wide on desktop.

Tap any tool to jump straight in — no signup, works on mobile.

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