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
Use the current requirements of the receiving site or app. Dimensions below are illustrative working sizes, not verified platform specifications.
- Square: 400×400 or 1080×1080 px
- Landscape: 1200×675 or 1920×1080 px
- Product thumbnail: 800×800 px
Check aspect ratio, cropping, file type and file-size limits at the destination before export.
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.
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 resamples pixels and may change fine detail. Enlarging cannot recover detail absent from the source. Check text, edges and the intended display size, and keep the original.
Can I resize multiple images at once? Yes — select multiple files when uploading to resize them all in a single batch.
Sources and maintenance
References checked on 2026-10-30. Format capabilities and app support are separate from this site’s output; check the tool’s current options and limitations.