How to Resize an Image Online for Free
Change image dimensions in seconds — no Photoshop needed. Resize photos for social media, email, web uploads, and more. Free and browser-based.
Resizing an image used to mean opening Photoshop or a similar desktop app. Today you can do it in any browser in a few clicks.
How to Resize an Image Online
- Go to the Image Resizer on this site.
- Click Choose Files and select your image(s).
- Enter the target width and/or height in pixels. Leave one dimension blank to resize proportionally.
- Click Resize and download your resized image.
Common Resize Dimensions
Different platforms have different image requirements. Here are the most common:
Social media profile pictures:
- LinkedIn: 400×400 px
- Twitter/X: 400×400 px
- Instagram: 320×320 px (recommended)
Social media posts:
- Instagram square: 1080×1080 px
- Facebook cover photo: 820×312 px
- Twitter/X post image: 1200×675 px
Web images:
- Hero/banner image: 1920×1080 px (or smaller for performance)
- Blog post thumbnail: 1200×630 px (also works for link previews / Open Graph)
- Product image: 800×800 px or 1000×1000 px
Tips
Resize before compressing. If you also need to compress your images, resize first. A smaller image compresses faster and produces a smaller final file. Use the Image Compressor after resizing.
Maintaining aspect ratio. If you enter only width or only height, the resizer keeps the original proportions. Entering both dimensions stretches the image to exactly those measurements — useful for fixed-size thumbnails.
Upscaling has limits. Making an image larger than its original dimensions will produce a blurry result. There's no way around this — a small image simply doesn't contain enough pixel data to fill a larger canvas sharply.
Other Ways to Resize Images
On Windows
Right-click the image → open with the Photos app → three-dot menu → Resize → pick a preset or enter custom dimensions.
On Mac
Open in Preview → Tools → Adjust Size. Check "Scale proportionally" to keep the aspect ratio intact.
In Google Slides
Insert the image, click it, then use Format → Image → Size & Position to enter exact pixel values.
Frequently Asked Questions
What image formats can I resize? The Image Resizer on this site supports JPEG, PNG, WebP, GIF, BMP, and AVIF.
Does resizing reduce image quality? Resizing down (making an image smaller) just removes pixels — visual quality stays the same for the resulting size. Resizing up adds pixels by interpolation, which can look blurry.
Can I resize multiple images at once? Yes — select multiple files when uploading to resize them all in a single batch.