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Resize image

Change image dimensions in pixels or percent while keeping the aspect ratio.

How it works

  1. Drag an image into the box above or click to choose one from your device.
  2. Adjust the options on the right – the preview updates instantly.
  3. Click the download button and save the result.

Enter a new width or height in pixels, or scale the image by percent. While the aspect ratio lock is on, the other dimension is calculated for you, so the picture never looks stretched.

Frequently asked questions

Are my images uploaded to a server?

No. Processing happens in your browser, on your device. The images never leave your computer or phone.

Is the tool free?

Yes. There is no sign-up, no limit on the number of images and no watermark on the result. The site is funded by ads.

Which image formats can I use?

JPG, PNG, WebP, GIF, BMP and, in recent browsers, AVIF. Convert iPhone HEIC photos to JPG on the phone first.

Is there a size limit?

We set no limit. Very large images (over 40 megapixels) may be slow or fail on phones with little memory.

More tools

Compress imageReduce image file size in KB – by quality or down to an exact target size (e.g. 20, 50 or 100 KB).Crop imageCrop part of an image freely or to a fixed ratio (1:1, 4:3, 16:9…).Convert imageConvert images to JPG, PNG or WebP – several files at once.Rotate & flip imageRotate an image by 90°, 180° or any angle and mirror it.Filters & adjustmentsAdjust brightness, contrast, saturation, black & white, sepia and blur.EffectsTurn a photo into a pencil sketch, pixel art or duotone, or add a vignette and grain.Blur part of imageHide a face, licence plate or personal data with blur, pixelation or a black box.Remove backgroundRemove a solid-colour background and get a transparent PNG – for a logo, signature or product.