Free Image Resizer: Resize Screenshots & Images Online in 2026

Why Resize Images?

Whether you're creating documentation, preparing presentations, or optimizing screenshots for reports, resizing images is a common task. Large screenshots can be difficult to share, slow to load, and take up unnecessary storage space.

Our free image resizer tool allows you to quickly adjust image dimensions while maintaining quality. Perfect for optimizing screenshots captured during screen monitoring or visual analysis workflows.

How to Use Our Free Image Resizer

1. Upload Your Image - Upload any screenshot or image (PNG, JPG, JPEG, WebP)
2. Set Dimensions - Enter your desired width and height in pixels
3. Maintain Aspect Ratio - Toggle to automatically adjust height when width changes (or vice versa)
4. Resize - Click the resize button to process your image
5. Download - Download your resized image instantly

The tool processes images entirely in your browser - no data is sent to servers, ensuring your images remain private.

Use Cases for Image Resizing

Documentation
Resize screenshots to fit documentation pages, ensuring consistent sizing and faster page loads.

Presentations
Optimize screenshots for slides, ensuring they display clearly without overwhelming the slide layout.

Reports
Resize images to meet file size requirements or to fit specific report templates.

Email Attachments
Reduce image sizes to ensure emails send quickly and don't exceed size limits.

Maintaining Aspect Ratio

When "Maintain aspect ratio" is enabled, changing the width automatically adjusts the height (and vice versa) to preserve the original image proportions. This prevents distortion and ensures your images look natural.

Disable this option if you need to crop or stretch images to specific dimensions, though this may result in some distortion.

Automate Screenshot Workflows

After resizing your screenshots, automate your workflow with MonitorSensei. Set up monitors to automatically detect visual changes on your screen, capture screenshots when changes occur, and get instant notifications.