Resize image files here when a photo is too big in pixels for where it needs to go. Phone cameras take very large pictures, and plenty of forms, websites and presentations want something smaller. You pick a percentage or type a width, and the tool changes the dimensions while keeping the shape of the picture the same.
Pick a size
There are four size options. Three are quick percentages and one lets you type an exact number.
| Size option | What happens | Example: a 4000 × 3000 photo becomes |
|---|---|---|
| 75% | Width and height shrink to three quarters | 3000 × 2250 |
| 50% | Half the width and half the height | 2000 × 1500 |
| 25% | A quarter of the width and height | 1000 × 750 |
| Custom width (pixels) | You type the width; the height follows | e.g. 1200 wide gives 1200 × 900 |
The aspect ratio is always kept, so faces don't get stretched and circles stay round. You only ever set one number, and the tool works out the other.
How to resize a photo online
- Add your images. JPG, PNG, WEBP, BMP, GIF and TIFF are accepted, up to 30 at a time.
- Choose 75%, 50%, 25% or "Custom width (pixels)". If you choose custom, type the width you want.
- Start the tool and download the result. One image downloads by itself; several arrive in a ZIP.
Every image in a batch gets the same setting. If you need different sizes, run separate batches.
When to use a percentage and when to type a width
Percentages are handy when you just want "smaller" and don't have a target. Halving a batch of holiday photos before you upload them to a shared album is a good example: 50% makes each one a quarter of the pixels, and they still look sharp on a phone screen. 25% suits thumbnails and small previews, where fine detail matters less.
A custom width is better when someone has given you a number. A website builder might ask for banner images 1200 pixels wide, or a school portal might want a photo no wider than 600 pixels. Type that width and the height follows automatically.
Resizing for passport, WhatsApp and Instagram
Official photo requirements differ between countries and forms, so always read the size the form asks for and type that width. If the form also asks for a specific height and your photo has a different shape, crop it to the right shape first, then resize. This tool keeps the shape you give it and doesn't crop.
For WhatsApp and Instagram, the main gain is a smaller, lighter file that sends faster on slow data. Try 50% first and look at the result on your phone before you send a whole batch.
Who resizes images
Students resize photos for school projects, slides and online application forms that reject large uploads. Office workers shrink screenshots and pictures before putting them into reports or emails so the files don't swell. Small business owners resize product photos so every listing in an online shop has the same width and the page loads lighter.
Bloggers and people running a WordPress site often resize images before uploading, which keeps the media library smaller. Teachers resize class photos before printing them on worksheets or newsletters.
What resizing can't do
Resizing changes the number of pixels. It can't add detail that isn't in the photo. The percentage options only shrink images. A custom width larger than the original will make the picture bigger, but it won't look sharper; it usually looks softer.
The output keeps the same format as the input, so a PNG comes back as a PNG and a JPG as a JPG. If you need a different format too, use Image converter afterwards. If your goal is a smaller file size in megabytes rather than smaller dimensions, Compress image is often the better tool, since it resizes very large photos and saves them as optimised JPGs in one step. Photos that come out sideways can be fixed first with Rotate image.
Privacy
Your images are processed on our server and deleted as soon as the resized versions are sent back to you. We don't store or share them, and we don't add a watermark. You can use the tool on any phone or computer browser without installing anything or making an account, and each upload can be up to 100 MB.
Frequently asked questions
Will resizing stretch or squash my photo?
No. The tool always keeps the aspect ratio. You set the width (or a percentage) and the height changes to match.
Can I set both the width and the height?
No. You choose a percentage or a custom width, and the height is calculated so the picture keeps its shape. If you need an exact width and height, crop the photo to that shape first.
Can I make an image bigger?
Yes, with a custom width larger than the original. The picture will have more pixels, but it won't gain detail, so it will usually look softer rather than sharper.
Does the image change format?
No. The resized image is saved in the same format you uploaded, whether that's JPG, PNG, WEBP, BMP, GIF or TIFF.
How many images can I resize at once?
Up to 30 images in one batch. They all get the same size setting and come back together in a ZIP file.
Is the image resizer free on mobile?
Yes. It works in Chrome, Safari and other browsers on Android and iPhone at no cost. Tap "Select files" to pick photos from your gallery.