Image Resizer

About Image Resizer

Different uses need different sizes: profile photos, banners, product images and email attachments. Choose an image, enter the width and height or leave height empty to keep the ratio, select JPG, PNG or WebP, and download the resized file. The work is done in your browser and nothing is uploaded.

Example

Input: a 4000 by 3000 photo resized to a width of 800. Output: an 800 by 600 image ready to download, with its new file size.

Tips for better results

• Enter only the width to keep the aspect ratio.
• Avoid enlarging small images, which makes them blurry.
• Save a copy with a different name to keep the original.

When to use Image Resizer

Use the Image Resizer when the pixel size of a picture matters more than its file type. Social profile photos, blog banners, marketplace listings, school forms and email signatures all ask for specific dimensions or a maximum width. Small business owners, students and office workers often need a quick fix without opening a design program. Enter a width, a height or a percentage, check the preview numbers, and download a file that fits the requirement the first time.

Real-world uses

• A seller scales product photos to the same width so every listing on an online marketplace looks tidy and consistent in the grid.
• A student shrinks a passport style photo to the exact pixel dimensions required by a university application form before uploading it.
• A marketer makes a copy of a blog header at half the width to use as a smaller thumbnail in a newsletter.
• A freelancer reduces a company logo to a few hundred pixels wide so it fits neatly into an email signature without stretching.

Common mistakes to avoid

• Typing both width and height without matching the original ratio stretches or squashes the picture. Change one value, or confirm the ratio is correct before downloading.
• Resizing a small image up to a large size cannot add detail. Start with the largest original you have whenever you need a bigger version.
• Checking only the number of pixels can miss a file size limit. A resized image may still exceed an upload cap, so compress it if needed.

Resize images to exact pixels or by percentage. It works instantly in your browser, so there is nothing to install and nothing to upload. Image Resizer is part of our collection of 100 free tools in the Images & Design category.

How to use it

1. Enter your information or choose a file in the tool above.
2. Your result appears right below the tool.
3. Copy the result, or adjust your input and try again.

Frequently asked questions

Does resizing change the file size?

Usually yes. Fewer pixels mean less data, so the file gets smaller. The exact saving depends on the content and format, so check the result if you have an upload limit to meet.

What is the difference between resizing and cropping?

Resizing changes the size of the whole picture and keeps everything in it. Cropping cuts away edges and keeps only part of the image. If a form needs a certain shape, you may need both.

Is Image Resizer free to use?

Yes. Image Resizer is completely free and you do not need to create an account.

Is my data uploaded anywhere?

No. This tool runs in your browser, so what you type or choose stays on your device.

How accurate are the results?

Calculations use standard formulas, but always double-check important figures, especially for money, health or legal decisions.