Will the images lose quality?

Making an image smaller removes fine detail, because there are fewer pixels. JPGs are saved at high quality (92%). PNGs don’t lose any quality.

Can I make images larger?

Yes. Turn off “Never make images larger,” then enter a larger number. The tool can’t add detail that isn’t in the original, so the larger you go, the softer the image looks.

Will the proportions change?

No. When you set the width or the height, the other side follows to keep the proportions. This page doesn’t crop images to a different shape.

What happens to transparent parts of a PNG?

If you choose “Same as the original” or “PNG,” they stay transparent. If you choose “JPG,” they turn white.

Can I add iPhone photos (HEIC)?

Yes. They’re resized and saved as JPG (or PNG if you choose it). If you only want to change the format, try our HEIC to JPG Converter.

I only want a smaller file size (MB). Which tool should I use?

Try Compress Images. You can set a limit like “2 MB or less” and keep the width and height as they are.

Resize Images — Change the size of photos, many at once

This page in Japanese: 日本語

Change the width and height (in pixels) of your photos and images right on this page. Set the longest side to 1600 pixels, the width to 800 pixels, or shrink to half size, for example. It’s completely free for as many images as you like, as often as you like. No sign-up, no ads, and no app to install. You can add iPhone photos (HEIC) as they are.

Resize your images

Drag your photos here Choose your photos Add as many as you like (JPG, PNG, HEIC, WebP) Choose Photos

How to set the size (choose before you add photos)

Longest sidepixels

Widthpixels (height follows, keeping the proportions)

Heightpixels (width follows, keeping the proportions)

Scale to% of the original

Never make images larger (small images stay as they are)

Save as Same as the original (PNG stays PNG, others become JPG) JPG PNG (keeps transparent parts)

Getting the converter ready…

How to use it

Choose how to set the size and enter a number. If you’re not sure, leave it on “Longest side 1600 pixels.” Do this before you add your photos.
Click “Choose Photos,” or drag your photos into the box on this page. The proportions of each photo stay the same.
Click “Save” next to a resized image. If you have many, click “Save all as ZIP.”

Each resized image is saved as a new file, with its new size added to the end of the name (for example, -1600x1200). Your original photos don’t change. The resized images don’t keep the date and time a photo was taken, or where it was taken (location data).

This tool at a glance, in one diagram (not a screenshot).

Which size to choose

Attaching to an email: longest side 1600 pixels
Posting on a blog or social media: longest side 2000 pixels (X and Instagram shrink larger images for you)
Profile pictures and icons: width 400 to 800 pixels
Images on a web page: twice the width they’re shown at (for example, 1200 pixels for an image shown 600 pixels wide)
A form that asks for a maximum number of pixels: longest side set to that number

On a Mac, you can do it without this page

Your Mac can already resize images.

In Preview on a Mac

Open the image in Preview. To keep the original, first choose File > Duplicate and work on the copy.
Choose Tools > Adjust Size.
Enter a new Width or Height. With “Scale proportionally” selected, the other value is set for you.

We checked these steps against Apple’s own guide: Crop, resize, or rotate an image in Preview on Mac. For many photos at once, or on an iPhone or a Windows PC, this page is the easier way.

Frequently asked questions

Is it really free?: Yes. It’s free for as many images as you like, as often as you like. No sign-up and no ads.
Will the images lose quality?: Making an image smaller removes fine detail, because there are fewer pixels. JPGs are saved at high quality (92%). PNGs don’t lose any quality.
Can I make images larger?: Yes. Turn off “Never make images larger,” then enter a larger number. The tool can’t add detail that isn’t in the original, so the larger you go, the softer the image looks.
Will the proportions change?: No. When you set the width or the height, the other side follows to keep the proportions. This page doesn’t crop images to a different shape.
Will my original photos change?: No. Each resized image is saved as a new file, with its new size added to the end of the name (for example, -1600x1200).
What happens to transparent parts of a PNG?: If you choose “Same as the original” or “PNG,” they stay transparent. If you choose “JPG,” they turn white.
Can I add iPhone photos (HEIC)?: Yes. They’re resized and saved as JPG (or PNG if you choose it). If you only want to change the format, try our HEIC to JPG Converter.
I only want a smaller file size (MB). Which tool should I use?: Try Compress Images. You can set a limit like “2 MB or less” and keep the width and height as they are.

More tools and “Mac Tricks”

All browser tools: images, PDFs and audio, on one page.
Compress Images: make photos smaller, many at once.
HEIC to JPG Converter: turn iPhone photos into JPGs, many at once.
PNG to JPG Converter: JPG to PNG too, many at once.
WebP to JPG Converter: turn WebP images into JPGs or PNGs.
Merge PDF Files, Split PDF, Compress PDF: combine, split and shrink PDFs.
All articles on “Mac Tricks”: everyday problems on the Mac, and how to fix them.

We also make Mac apps. For example, KoeShot lets you take screenshots and screen recordings on your Mac with your voice.

Software used in this tool

To read iPhone photos (HEIC), this tool uses libheif and libde265 (both under the GNU LGPL v3.0), without any changes. The licenses and where to get the source code are in the full license list (libheif, libde265, libheif-js).