How do I resize an image without stretching it?

Leave Lock aspect ratio on and use Fit inside. Change one side and the other follows. Exact size is the mode that can stretch the picture, and the result says when that happens.

Does resizing reduce the file size in kilobytes?

Often, because fewer pixels need to be encoded. It does not aim at a number such as 100 KB or 200 KB. Use Compress image when the limit is a file size.

Can I make an image larger?

Yes. Type a larger width or height, or choose 200 percent. The extra pixels do not add real detail. Turn on Do not enlarge smaller images if a batch should stay at or below the original pixel size.

Will a transparent PNG stay transparent?

Yes, if the output stays PNG or WebP. JPG has no transparency, so those pixels are placed on the background color and the result says so.

Can I resize more than one image?

Yes. Add them together. With the ratio locked, each image uses its own ratio. Download each file, or use Download all for the successful results.

Does the resized file still contain the location?

A newly drawn file does not. If the original already matches the size and format you asked for, that original file is kept. Remove metadata is the tool that strips hidden details on purpose.

Resize an image by width and height

How to resize an image

Add the file first. The width and height appear beside it, and nothing on this page asks for an account.

Use Browse files, or drop the image. Several images are allowed, up to 20.
Preset starts on Custom. You can also choose 1920 wide, 1280 wide, 1080 wide, 800 wide, or 25, 50, 75, or 200 percent.
Width and Height are pixels, from 1 to 12,000. On the first image, Custom starts at the photo’s own width, or at 1920 if the photo is wider than that. With Lock aspect ratio on, the side you edit sets the other side.
Fit starts on Fit inside. The other choices are Fill and crop, and Exact size.
Output can stay on Keep format, or you can choose JPG, PNG, or WebP. Background for JPG is used only when the result is JPG and the picture has transparent pixels. It starts white.
Do not enlarge smaller images is off. Turn it on when a batch should never grow past the original pixel size.
Press Resize image. Each result shows the original dimensions, the new dimensions, and the scale.
Download the file. Download all appears when two or more files succeed.

Width, height, and aspect ratio

A size such as 1920 × 1080 means 1920 pixels across and 1080 pixels down. The aspect ratio is the width divided by the height. A 1200 × 800 photo is one and a half times as wide as it is tall.

Lock aspect ratio keeps that relationship. Set the width to 600 and the height becomes 400. Set the height instead, and the width follows. A stretched picture usually means both sides were forced to numbers that do not match the original ratio.

A percentage preset ignores the lock and scales both sides from each image’s own size. 50 percent of 1200 × 800 is 600 × 400. Typing a width or height switches a percentage preset back to Custom.

Fit inside, fill, and exact size

Fit inside, with the lock on, uses the side you edit. The file is the size of the scaled photo, not a padded frame.

Fit inside, with the lock off, keeps the whole photo inside the width and height you type. A 1200 × 800 photo inside 600 × 600 becomes 600 × 400. Nothing is added around it, and it is not stretched.

Fill and crop makes the file exactly the width and height you type. The photo covers that frame, and the extra edges are cropped. A 1200 × 800 photo in a 200 × 200 frame becomes 200 × 200. The lock does not change this frame. If you need to choose which part of the picture stays, crop it instead.

Exact size turns the lock off and forces both numbers. If the new ratio does not match, the result says the image is stretched. Use it only when the frame must be those exact pixels and a little distortion is acceptable.

Smaller dimensions and larger ones

Reducing the pixel size drops pixels the new grid does not have room for. That is the usual job for a camera photo that only needs to be about 1600 pixels wide on a page, in an email, or in a document.

Increasing the pixel size spreads the pixels you already have across a larger grid. It does not create photographic detail that was not in the file. The 200 percent preset doubles the width and the height. It is not an AI upscaler, and it will not restore a soft or small photo.

If Do not enlarge smaller images is on and the request is larger than the original, the original file is kept. The result says so.

Pixels are not kilobytes

This page changes width and height. Compress image changes how the file is encoded, so the download is measured in kilobytes or megabytes. A form that asks for 1200 × 800 pixels belongs here. A form that asks for a file under 200 KB belongs on Compress image.

Fewer pixels often make a lighter file, because there is less picture to encode. That is not the same as hitting a kilobyte target. If you only want to read the current width and height, without changing them, use Image dimensions.

Searches for image size use the same words for both jobs. A request in pixels belongs here. A request in KB or MB belongs on Compress image.

Compared	Resize image	Compress image
What changes	Width and height	Encoded file size
The unit	Pixels	Kilobytes or megabytes
A typical request	1200 × 800 pixels	Under 200 KB
Stretching	Avoid it with the ratio lock	Not what that tool does

What the new file keeps

PNG and WebP keep transparent pixels when you keep those formats. JPG cannot. Transparent areas are placed on the background color, which starts white, and the result says so. You can pick another color before you resize.

A GIF is resized from its first frame only. The browser does not write a GIF, so the result is JPG unless you choose PNG or WebP. The animation is not kept.

There is no quality slider here. JPG and WebP are written at quality 92. PNG is written without dropping pixels to chase a smaller file. To change format without resizing, use the converter.

A camera photo stored sideways is opened upright, and the new file is that upright picture. A newly drawn file does not copy the camera model, the time, or the location. If the original already has the dimensions you asked for and the format stays the same, that original file is kept, including whatever was already inside it.

Practical limits

These limits are part of the resizer. They are not a promise about file size.

Up to 20 images at a time. One file that fails does not cancel the others. Stop ends the queue after the file already in progress.
Each file can be up to 25 MB. A side longer than 12,000 pixels is refused, and you cannot ask for a side longer than 12,000.
A device that is low on memory can still fail on a very large image. The original file on your device is not modified.
An iPhone photo saved as HEIC is not decoded here. Convert it to JPG first.
The picture is drawn in your browser. PixZeno does not receive it for processing. If you send a result to another tool, this browser keeps a temporary copy on this device so the next page can open it. Clear images saved in this browser, in the footer, removes that copy.