Image Resizer
Resize images by defining new height and width dimensions.
Your files are processed locally in your browser.
About Image Resizer
The Image Resizer lets you change the dimensions of any photo or graphic to exact pixel dimensions or a percentage of the original size. Resizing images is a fundamental task for web developers (meeting specific layout requirements), social media managers (matching platform-specific dimensions), designers (preparing assets for different screen densities), and everyday users (making large photos more shareable via email or messaging apps). Our tool supports both pixel-based resizing and percentage-based scaling, with an aspect ratio lock option to prevent your image from getting distorted. All resizing is performed locally in your browser, making it fast, private, and free.
How to Use Image Resizer
- 1Upload your image file using the file picker or by dragging it into the tool.
- 2Enter the desired new width and height in pixels, or specify a percentage scale factor.
- 3Toggle the aspect ratio lock if you want to maintain the original proportions.
- 4Click Resize and download your newly resized image.
Key Features
- ✓Resize by exact pixel dimensions or percentage
- ✓Aspect ratio lock to prevent distortion
- ✓Fast browser-side canvas processing
- ✓Supports common image formats
🔒 Privacy First — Your Data Never Leaves Your Device
Your privacy is our highest priority. The Image Resizer tool processes all your files and data entirely within your web browser using modern JavaScript and WebAssembly technology. No files, images, documents, or personal information are ever uploaded to our servers or transmitted over the internet. This means your sensitive data stays completely private, secure, and under your control at all times — even if you are offline after the page has loaded.
Frequently Asked Questions
Can I keep the original proportions?
Yes, the tool has an aspect ratio lock option. When enabled, changing either the width or height will automatically calculate and update the other dimension proportionally, ensuring your image is not stretched or squashed. This is the recommended setting for most use cases to prevent your photos from looking distorted.
Can I scale up (upsize) images as well?
Yes, you can scale an image up to larger dimensions. However, upscaling a raster image (JPG, PNG) will not add new detail — it simply spreads existing pixels over more space, which can result in blurring or pixelation at extreme magnifications. For the best upscaling results with AI-enhanced quality, try our Image Upscaler tool.
Why Use AllAdvanceTools?
⚡ Instant & Free
All tools are completely free to use with no subscriptions, no sign-ups, and no usage limits. Process your files in seconds directly in your browser.
🛡️ 100% Private
We never upload your files to any server. Every conversion, calculation, or transformation happens locally on your device, guaranteeing total privacy.
🌐 Works Everywhere
Our tools work on any modern browser across Windows, Mac, iOS, and Android — no installation, no plugins, and no dependencies required.