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Resize image

Change an image's width and height, or shrink it to a file size such as 50 KB, right in your browser.

  • Works in your browser
  • No sign-up
  • Free to use

How to use Resize image

  1. 1

    Add one or more images (JPG, PNG, WebP, AVIF, GIF or BMP), or paste one with Ctrl+V.

  2. 2

    Choose how to resize – by pixels, by percent, or to a target file size.

  3. 3

    For pixels, type a width or a height and leave "Keep aspect ratio" on so nothing gets squashed.

  4. 4

    For a file size, pick 20 KB, 50 KB, 100 KB or type your own, such as 30 KB.

  5. 5

    Press "Resize images" and download each picture, or all of them in one ZIP.

What this tool does

Resize image changes the dimensions of your pictures, or brings their file size down to a number you choose. It is built for the everyday cases: an exam or job portal that only accepts photos under 50 KB, a profile picture that must be 400 × 400, or a folder of holiday photos that is too heavy to email.

Three ways to resize

  • By pixels. Set a width, a height or both. With the aspect ratio locked, the other side follows automatically.
  • By percent. Scale every image by the same amount, from 5% to 200%.
  • To a file size. Pick 20 KB, 50 KB, 100 KB, 200 KB or 500 KB, or type any size. The tool searches for the highest quality that fits, and reduces the dimensions only when it must. You can turn that off to keep the original width and height.

Features

  • High-quality scaling with the Lanczos3 filter, which keeps downsized photos sharp without jagged edges.
  • Batch resizing with a single ZIP download.
  • Output format choice: keep the original format or save as JPG, PNG, WebP or AVIF.
  • Clear file names that include the new size, such as photo-800x600.jpg.

Limits

  • Target file sizes produce JPG or WebP, because PNG is lossless and can't be squeezed to an exact size.
  • If a target is very small for a large photo, the picture becomes much smaller in pixels. When even the smallest version is over the limit, you get that smallest version and a note.
  • GIF and BMP files are saved as PNG (the first frame of an animated GIF).
  • The largest side we create is 16,384 pixels.

Where your file is processed

This tool works in your browser: your file is processed on your own device, so it isn't sent to our server for this tool. Some other tools on UtiloNest do use our server, and their pages say so.

Frequently asked questions

How do I make a photo exactly 20 KB or 50 KB for an online form?

Choose "File size", pick the preset (or type a custom value like 30 KB) and press Resize. The tool lowers the JPG or WebP quality step by step until the file fits, and only reduces the width and height when quality alone can't get it under the limit. The result is at or below the size you asked for.

Will resizing stretch or distort my picture?

Not with "Keep aspect ratio" on. Type just a width (or just a height) and the other side is calculated for you. If you fill in both, the image is fitted inside that box. Turn the option off only when you really need an exact size such as 600 × 600, which can stretch the picture.

Can I make a small image bigger?

Yes, by pixels or with a percentage above 100%. Enlarging can't add detail that isn't there, so a big upscale will look soft. The tool uses Lanczos resampling, which keeps edges as sharp as resizing allows.

What size in pixels is right for a passport photo, website or email?

Each form or site sets its own rules, so check the exact numbers it asks for. As a rough guide, 1200–2000 px on the long side is plenty for web pages and email, while upload forms often want a fixed size in pixels or a file under a set number of KB.

Where is my file processed?

In your browser. This tool works on your own device, so the file isn't sent to our server for it.

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