anvil · Free online tools

Resize images online

Resize images by width, height or percentage.

Successful uses：—

  • No upload
  • No sign-in required, no watermark
  • No limits

How to use

  1. 01

    Drop images onto the page, paste them or choose files.

  2. 02

    Enter the target width, height or scale (0.5 means 50%). Images are never upscaled unless you allow it.

  3. 03

    Choose Resize images to export, with multiple files packed as a zip. Continue editing preserves the originals and undo history.

Supported formats

Input: PNG, JPG, WebP, GIF, BMP. PNG / JPEG / WebP keep their format. GIFs keep the original file at the original size and export as PNG when resized; BMP exports as PNG. Format and device limits are checked before export. HEIC, AVIF and SVG are not supported yet.

More tools

FAQ

Will my image be distorted?
No. All four modes keep the aspect ratio. "Fit inside" scales the image to fit the given box without cropping.
I entered a larger size but nothing changed?
Upscaling is off by default because it adds no detail, only blur. Tick "Allow upscaling" when you really need it.
How is the quality when shrinking?
Lanczos resampling, the same family of algorithm desktop editors use for high-quality scaling. Smaller images also mean smaller files.
Are my images uploaded?
No. Resizing happens locally in your browser.