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Resize an image

Set exact pixel dimensions, scale by percentage, or fit within a boundary.

Resize Image

Never uploaded

Your file is processed in this tab and never sent anywhere.

How to resize image

  1. Add your images. One or many, in any common format.
  2. Set the size. Exact pixels, a percentage, or a maximum boundary to fit within.
  3. Download. Individually or as a zip.

About resize image

Resizing is the most effective thing you can do to an image file, and it is consistently underused. File size scales with the number of pixels, so halving both dimensions cuts the pixel count to a quarter — and the file size along with it. A phone photograph at 4032 by 3024 contains around twelve million pixels. Displayed in a 600-pixel-wide column, roughly ninety-eight percent of that data is thrown away by the browser on every single page load.

Three modes cover the practical cases. Exact dimensions is right when a system specifies a size, such as a profile picture or a banner slot. Percentage is right for proportional reduction across a batch of mixed sizes. Fit within a boundary is the most useful of the three for general work: it caps the longest edge at a value you set, so every image ends up manageable regardless of whether it started portrait or landscape.

Keep the aspect ratio locked unless you have a specific reason not to. Entering both a width and a height that do not match the original proportions will either stretch the image or crop it, and stretched photographs look wrong in a way people notice without being able to say why. If you need a specific shape rather than a specific size, cropping is the correct tool — resizing is for scale, not for composition.

Downscaling is essentially free in quality terms; the browser resamples smoothly and the result looks clean. Upscaling is not. Enlarging a 400-pixel image to 2000 pixels invents no detail — it interpolates between existing pixels and produces something soft and slightly plastic. Genuine upscaling requires machine learning models that reconstruct plausible detail, which is not what a canvas resize does, and it is better to say so than to imply otherwise.

Common target sizes

UseDimensionsNote
Website content image1200 px wideCovers most layouts including retina
Blog or article thumbnail600 × 400Keep under 100 KB
Profile picture400 × 400Square — crop first if needed
Email attachment1600 px longest edgeReadable without being huge
Print at 300 DPIInches × 300A 6×4 photo needs 1800 × 1200

Resize Image FAQ

How do I resize an image without stretching it?

Keep the aspect ratio lock on and set only one dimension. The other adjusts proportionally. Entering both mismatched values is what causes stretching.

Does resizing reduce quality?

Downscaling looks clean — the browser resamples smoothly. Upscaling does not add detail and produces a soft result, since there is no extra information to recover.

What size should a website image be?

Around 1200 pixels wide covers most layouts including high-density screens. Anything much larger is data the browser discards on every load.

Can I resize several images to the same size?

Yes. Add the batch and apply one setting to all of them. Fit-within mode handles mixed portrait and landscape sensibly.

Will resizing make my file smaller?

Substantially. File size scales with pixel count, so halving both dimensions cuts the file to roughly a quarter.

Are my images uploaded?

No. Resizing happens on the canvas in this browser tab.

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