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Resize an Image Online Free — No Upload, Works In Your Browser

This tool resizes JPG, PNG and WebP images to exact pixel dimensions or by percentage, directly in your browser. Lock the aspect ratio to avoid distortion, or set width and height independently. Files are never uploaded, there is no size limit, and resized images download immediately as JPG, PNG or WebP.

Drop images here

Select the JPG, PNG or WebP images you want to resize.

Accepts JPG, PNG, WebP and GIF · No file-size limit · Nothing is uploaded

Resize by
Output format

Keeps the original proportions so the image is not stretched.

Presets

85%

Applies to JPG and WebP. 85% keeps photos sharp at a much smaller size.

Resizing runs on your device. No image is uploaded, stored or transmitted.

Your images

No images selected yet

Add a JPG, PNG or WebP file above and it will appear here.

How to resize an image

  1. Add your imagesDrag JPG, PNG or WebP files onto the drop zone, or select them with the Choose images button. You can add several at once.
  2. Set the sizeEnter a width and height in pixels, or switch to Percentage to scale proportionally. Keep the aspect-ratio lock on unless you deliberately want to stretch the image.
  3. Resize and downloadSelect Resize images, check the new dimensions, then download each file individually or all of them together as a ZIP.

What resizing an image actually changes

Resizing changes the pixel dimensions of a picture: a 4032 × 3024 photo from a phone becomes, say, 1200 × 900. Fewer pixels means less data, so the file gets smaller as a side effect. This is different from compression, which keeps the dimensions and instead stores the same picture with less detail.

Reducing dimensions is the more effective of the two when an image is far larger than the space it will be displayed in. A 4000-pixel-wide photo shown in a 400-pixel-wide column wastes about 99% of the pixels it carries, and no amount of compression recovers that.

Why the aspect-ratio lock matters

Aspect ratio is the relationship between width and height. Common ratios are 1:1 for profile pictures and Instagram posts, 16:9 for video thumbnails and widescreen displays, 4:3 for older camera photos, and 9:16 for Stories and vertical video.

With the lock on, entering one dimension calculates the other automatically and the picture keeps its proportions. With the lock off you can force any width and height, which stretches or squashes the subject. Turn it off only when a platform demands an exact size and you have already cropped the image to suit.

Your images stay on your device

Resizing uses the browser's own canvas rendering. Files are read into memory, redrawn at the new size, and offered back as a download. No image is sent to a server, which means nothing to breach, nothing retained, and no queue when the tool is busy. It also keeps working after the page has loaded even if you go offline.

Keeping resized photos sharp

Making an image smaller is safe: detail is discarded, and the result generally looks clean. Making one larger cannot invent detail that was never captured, so enlarging past roughly 150% of the original tends to look soft. For photos, exporting as JPG or WebP at 85% quality keeps the result visually sharp while cutting file size substantially; for logos, screenshots and anything with flat colour or transparency, PNG is the better choice.

Frequently asked questions

Are my images uploaded to a server?

No. The resizing happens entirely in your browser using the canvas API. Your images are never transmitted, stored or seen by anyone else.

How do I resize an image to an exact size like 600×600?

Choose Pixels, turn off the aspect-ratio lock if your image is not already square, then enter 600 for both width and height. The passport preset applies 600×600 in one click.

Will resizing make my image blurry?

Reducing size keeps images sharp. Enlarging cannot add detail that was not in the original, so images enlarged much beyond 150% will look soft.

Does resizing also reduce the file size?

Yes. Fewer pixels means a smaller file. Halving both width and height removes about 75% of the pixels. If you need to hit an exact file size instead, use the image compressor.

Can I resize several images at once?

Yes. Add as many files as you like, set the dimensions once, and download the results individually or together as a ZIP.

Which format should I choose?

JPG for photographs, PNG when you need transparency or crisp text and graphics, and WebP when you want the smallest file and only need modern browsers.

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