Corvo

Image tools

Image Resizer

Resize an image by exact pixels or by percentage, with aspect ratio locked or free. Entirely in your browser — nothing is uploaded.

Runs entirely in your browser. Nothing is uploaded.

or drop an image here — up to 25 MB, entirely local to your browser

Waiting for an image

What this tool does

Resizes an image by exact pixel dimensions or by percentage, entirely in your browser. Keep the aspect ratio locked to avoid distortion, or unlock it for an exact width and height regardless of the original proportions.

How to use it

  1. Choose or drop an image.
  2. Pick Pixels for an exact size, or Percentage to scale proportionally.
  3. In pixel mode, type a width or height — with the lock on, the other dimension updates automatically.
  4. Download the resized result.

Choosing a size

Common targets: 1200px wide for a blog header image, 800px for a product photo, 400px for a thumbnail, or a specific pixel size a platform requires (many social networks and CMSs publish exact dimensions for profile photos, banners, and thumbnails). When in doubt, resize down rather than up — shrinking a large image loses nothing you'll notice, while enlarging a small one makes the softness of the upscale visible.

Questions

Is this Image Resizer free?

Yes, completely, with no signup and no limit on how many images you resize.

Is my image uploaded anywhere?

No. Resizing happens entirely in your browser using the Canvas API — nothing is sent to a server. You can confirm this yourself by watching your browser's Network tab while using the tool.

Will resizing up (making it bigger) actually add detail?

No — scaling up stretches the existing pixels rather than inventing new detail, so a heavily upscaled image will look softer or blurrier than a photo actually taken at that size. Scaling down is where this tool is genuinely useful without a quality trade-off.

What format does the resized image download as?

The same format as what you uploaded. If you need to change format as well as size, use the Image Converter afterward.

What's the difference between locked and unlocked aspect ratio?

Locked keeps the original proportions — changing the width automatically recalculates a matching height, so the image never looks stretched. Unlocking lets you set width and height independently, which distorts the image unless the new ratio happens to match the original.

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