Resize Image Online Free
Change image dimensions instantly. Upload your photo and resize it to any width or height using simple URL parameters. No registration, no watermarks.
How to Resize an Image Online
Upload
Drag and drop your image or click to browse files
Get URL
After upload, you'll receive a direct link to your image
Resize
Add size parameters to the URL to get resized version
Image Resize URL Parameters
After uploading, you can resize your image by adding parameters to the URL. Our CDN processes the image on-the-fly and caches the result for fast delivery.
Available Resize Parameters
| Parameter | Description | Example |
|---|---|---|
w_ |
Set width in pixels (1-2000) | w_800 |
h_ |
Set height in pixels (1-2000) | h_600 |
c_fit |
Fit image within dimensions, maintain aspect ratio | w_800,h_600,c_fit |
c_fill |
Fill exact dimensions, crop if needed | w_800,h_600,c_fill |
c_scale |
Stretch to exact dimensions (may distort) | w_800,h_600,c_scale |
q_ |
Quality (1-100), default 80 | q_90 |
f_ |
Output format: jpg, png, webp | f_webp |
Why Use Our Image Resizer
Instant Processing
Images are resized on-the-fly via our global CDN. No waiting.
No Watermarks
Your resized images are clean with no branding or watermarks.
No Registration
Start resizing immediately. No account required.
Global CDN
Images delivered from edge servers closest to your users.
Multiple Formats
Support for JPG, PNG, GIF, WebP. Convert between formats.
Developer Friendly
Simple URL API. Easy to integrate into any project.
Common Image Resize Use Cases
Social Media Images
Resize photos for Instagram (1080x1080), Facebook cover (820x312), Twitter header (1500x500), or LinkedIn banner (1584x396). Just upload once and create multiple sizes via URL.
Website Thumbnails
Generate consistent thumbnails for your blog or e-commerce site. Use w_320 for small thumbnails, w_640 for medium, or w_1280 for large previews.
Email Newsletters
Optimize images for email by resizing to 600px width (standard email width) and converting to WebP or progressive JPEG for faster loading.
Mobile Apps
Serve appropriately sized images based on device. Create 1x, 2x, 3x versions for different screen densities using width parameters.
Frequently Asked Questions
Upload your image to kinja-img.com, then add size parameters to the URL. For example, to resize to 800px width, add w_800 before the filename: https://i.kinja-img.com/img/w_800/yourimage.jpg
Yes, our resizer uses high-quality algorithms. You can control quality with the q_ parameter (1-100). For best results when reducing size, use q_90 or higher. The default is 80 which provides a good balance of quality and file size.
We support JPG, PNG, GIF, and WebP formats. You can also convert between formats using the f_ parameter. For example, f_webp converts any image to WebP format for smaller file sizes.
Maximum upload size is 50MB per image. Output dimensions are limited to 2000x2000 pixels for security. This is sufficient for most web use cases.
Images are stored indefinitely unless you delete them. After upload, you receive a delete link that allows you to remove the image at any time.
Ready to Resize Your Images?
Upload your first image and start resizing in seconds. It's free, fast, and requires no registration.
Related Image Tools
Besides resizing, kinja-img.com offers many other image transformation features: