Why Use an Image Resizer? (Social Media, Web & Print Dimensions)
Different platforms demand exact pixel dimensions, such as Instagram posts (1080x1080), YouTube thumbnails (1280x720), and website hero banners. Our online image resizer allows you to resize image width and height in pixels or percentages while locking aspect ratios.
Resize images online for free directly in your web browser. Maintain crisp sharpness, eliminate pixel distortion, and optimize dimensions for web and print applications.
How Image Resizing Works (Bicubic Interpolation & Canvas Scaling)
The image resizer applies high-quality bicubic interpolation on an HTML5 canvas to recalculate pixel coordinates smoothly. Choose custom pixel dimensions, percentage scaling, or popular social media presets.
Inspect the scaled output and download your resized photo immediately with complete client-side privacy.
How to Resize an Image Online in 3 Steps
- 1Choose an image and review its current dimensions.
- 2Enter width and height, or choose a preset as a starting point.
- 3Keep the ratio locked to avoid stretching, then resize.
- 4Check the output dimensions and preview before downloading.
Example: understand the change before applying it
With the ratio locked, resizing a 1200 × 800 image to 600 pixels wide produces 600 × 400. To make a square without stretching, crop it first.
Continue with another task
Choose the next operation based on what you still need to change.
Key Benefits
- Change image width and height in pixels. Use the aspect-ratio lock to preserve proportions, or choose custom dimensions when the destination requires them.
- Preview before downloading
- Original file left unchanged
- Local processing