Image Resizer - Resize Images Online Free
Change image dimensions by exact pixels or percentages with aspect ratio lock and ready-to-use social media presets.
How to use Image Resizer in 3 simple steps
Choose Image
Select the photo or graphic you want to resize.
Set Dimensions
Input width and height in pixels or percentage, or pick a preset like Instagram Post or YouTube Banner.
Save Resized Image
Preview the new dimensions and download your perfectly scaled image.
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Precision Image Dimension Scaling in Your Browser
Every social network, content management system, and passport portal mandates specific pixel dimensions. An image that looks great on your phone might get cropped awkwardly or rejected outright when submitted as a YouTube banner or LinkedIn avatar.
Toolnova Image Resizer offers exact pixel-level scaling, percentage reduction, and pre-configured presets for popular social channels including Instagram, Facebook, X, and YouTube. Aspect ratio locking guarantees your photos never look squished or stretched.
All canvas scaling calculations run natively in your client browser, delivering high-fidelity bicubic interpolation without uploading files to remote servers.
Key features & capabilities
Frequently asked questions about Image Resizer
Common questions about usage, privacy, limits, and browser compatibility.
How do I resize an image to exact pixel dimensions?
Type your target width and height into the pixel fields, and the preview updates to show the new dimensions before you download. If you want the proportions to stay intact, leave the aspect ratio lock on so the second value is calculated for you.
Can I resize an image without stretching it?
Keeping the aspect ratio lock enabled scales width and height together, so the photo is never squashed or stretched. If you unlock it on purpose, you can force a specific shape, though faces and objects may end up looking distorted.
Can I upscale a small image without losing quality?
You can enter larger dimensions, but upscaling cannot recreate detail that was never captured, so a small photo will look softer when enlarged. Results stay sharpest when you scale a large image down to the size you actually need.
What social media presets does the resizer include?
Presets cover common formats for Instagram posts and stories, YouTube thumbnails, Facebook covers, and X posts. Picking one fills in the recommended dimensions for you, and you can still fine-tune the values if a platform asks for something slightly different.
Can I resize an image by a percentage instead of pixels?
Percentage mode scales an image relative to its current size, which is handy for halving a photo or cutting it to a quarter without doing the math. The resulting pixel dimensions appear as you go, so you can confirm the outcome before saving.
Are my images uploaded when I resize them?
All scaling happens in your browser on a local canvas, so the file stays on your computer or phone the entire time. Nothing is uploaded, no account is needed, and the downloaded image carries no watermark.