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Free Image Resizer Online

Image Tools

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What is Free Image Resizer Online?

Image Resizer changes the dimensions of photos and graphics to a specific width and/or height. It works entirely in your browser by drawing the image onto a canvas at the target size and exporting the result. The aspect ratio lock ensures images don't get distorted - if you set a new width, the height adjusts automatically to preserve proportions. You can also enter a percentage (e.g., 50%) to scale the image to half its original size.

How it works

The image is loaded into an HTML Canvas at the target dimensions. If aspect ratio is locked, the target dimension is calculated to match the original proportions. The canvas is then exported as a PNG or JPEG blob using toBlob(). Resizing up (making the image larger than the original) uses bilinear interpolation - the quality improvement is limited.

Features & Benefits

  • Resize images entirely in your browser - no server required
  • Lock aspect ratio to prevent distortion when resizing
  • Supports JPEG, PNG, and WebP input and output
  • Ideal for resizing profile photos, thumbnails, banners, and email attachments

Frequently Asked Questions

Is there a maximum image size?

The tool handles images up to around 50 MP. Very large images may be slow on older devices due to browser memory limits.

Can I resize to a percentage instead of pixels?

Yes. Enter a percentage value and the tool calculates the new pixel dimensions based on the original image size.

Will resizing to a larger size improve quality?

No. Upscaling a raster image makes it larger but cannot add detail that was not there originally. For AI upscaling, use a dedicated tool.

Does it preserve EXIF metadata?

EXIF metadata is stripped during browser-based canvas operations. If you need to preserve metadata, use a desktop image editor.

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