Image Resizer
Upload Image
Click to select or drag and drop
Supports: JPG, PNG, GIF, WebP, BMP
Preview
Original Image
Dimensions: -
File Size: -
Resized Image
Dimensions: -
Est. Size: -
Resize Mode
Dimensions (px)
Output Format
Quality
Tips:
- Enable aspect ratio for proportional resize
- Use presets for common sizes
- Higher quality = larger file size
- WebP offers best compression
About Image Resizer
Our free online image resizer allows you to change image dimensions quickly and easily. Resize by exact pixels or percentage, maintain aspect ratio for perfect proportions, and choose your preferred output format.
Key Features:
- Two Resize Modes: Resize by pixels or percentage
- Aspect Ratio Lock: Maintain original proportions automatically
- Quick Presets: Common sizes like 1920×1080, 1280×720, etc.
- Format Options: Save as JPEG, PNG, or WebP
- Quality Control: Adjust output quality (1-100%)
- Live Preview: See before and after comparison
- Dimension Display: View original and resized dimensions
- File Size Estimate: Preview estimated file size
- Privacy First: All processing happens locally in your browser
- High Quality: Professional resizing algorithms
How to Use:
- Upload your image by clicking or dragging it to the upload area
- Choose resize mode: Pixels or Percent
- For Pixels mode:
- Enter desired width and/or height
- Enable "Maintain aspect ratio" to keep proportions
- Or use quick presets for common sizes
- For Percent mode:
- Drag slider to scale (5% to 300%)
- Below 100% shrinks, above 100% enlarges
- Select output format (or keep original)
- Adjust quality slider if needed
- Click "Resize Image" to preview
- Download your resized image
Common Resize Presets:
- 1920×1080 (Full HD): Standard HD video, desktop wallpapers
- 1280×720 (HD): HD video, smaller displays
- 800×600: Email attachments, web thumbnails
- 640×480: Small web images, previews
Use Cases:
- Web Optimization: Reduce image size for faster loading
- Social Media: Resize for platform requirements
- Email Attachments: Shrink images to fit size limits
- Thumbnails: Create smaller preview versions
- Profile Pictures: Resize to exact dimensions
- Presentations: Fit images to slide dimensions
- Print: Resize to specific print dimensions
- Wallpapers: Match screen resolution
Aspect Ratio Explained:
When "Maintain aspect ratio" is enabled, the image's proportions are preserved. If you change the width, the height automatically adjusts (and vice versa) to keep the image from appearing stretched or distorted. Disable this option if you need exact dimensions, but be aware the image may appear stretched.
Note: This tool runs entirely in your browser using HTML5 Canvas technology. Your images are processed locally and never uploaded to any server, ensuring complete privacy and security.