Image Resizer

About This Tool

The Image Resizer lets you resize any image to custom pixel dimensions directly in your browser using the HTML5 Canvas API. It supports JPG, PNG, and WebP output formats with adjustable quality for lossy formats. Your image is never uploaded to any server.

Lock the aspect ratio to prevent distortion, or unlock it to set width and height independently. For JPEG and WebP, a quality slider (1–100) balances file size against visual fidelity — 80–90% is typically the best trade-off for photos.

How to Use

1. Drop an image onto the upload area or click to select a file.
2. Enter the target width and height in pixels.
3. Toggle the lock icon to maintain or release the aspect ratio.
4. Choose an output format: PNG, JPEG, or WebP. Set quality for JPEG/WebP.
5. Click Resize, then Download to save the resized image.

Use Cases

Web developers resize images for CMS uploads. Social media managers create platform-sized images (Open Graph 1200×630, Instagram 1080×1080). Email marketers reduce image sizes for newsletters. E-commerce sellers resize product photos to consistent thumbnail dimensions.

FAQ

• What input formats are supported? — Any image your browser can display: JPG, PNG, WebP, GIF (first frame), SVG, and more.
• Does upscaling reduce quality? — Yes. Upscaling interpolates pixels and introduces blurriness. For best quality, always resize down from a larger source.
• Which format should I use? — PNG for images with text or transparency; JPEG for photos; WebP for the best compression on modern browsers.