What is Image Resizer?
Free online image resizer. Resize by exact pixels, percentage scaling, or social media presets (Instagram, Facebook, Twitter, etc.). Smart aspect ratio lock prevents distortion. Output in JPG, PNG, or WebP. Suitable for web optimization, social media images, and e-commerce product photos. All processing runs locally in your browser — images never leave your device.
▶Use Cases5 scenarios
- ◆Social media image sizing
- ◆E-commerce product photo normalization
- ◆Web image optimization
- ◆ID photo resizing
- ◆Thumbnail generation
▶How to Use4 steps
- 1Upload your image
- 2Enter target width/height or choose a preset
- 3Check aspect ratio lock
- 4Download the resized image
▶Features6 features
- ✓Pixel/percentage/presets
- ✓Aspect ratio lock
- ✓JPG/PNG/WebP output
- ✓Live preview
- ✓Browser-based
- ✓Free unlimited
▶FAQ7 questions
What is Image Resizer?
An online image resizer. Resize by pixels, percentage, or presets while keeping aspect ratio. Supports multiple input formats with one-click copy or download. All operations run locally in your browser — no uploads.
Does resizing reduce quality?
Downscaling never reduces visual quality. Upscaling may cause slight blur — try our AI Image Upscaler for best results.
Does it support batch resizing?
Currently one image at a time, but processing is instant.
What image formats are supported?
Supports JPG, PNG, WebP formats. Custom dimensions or percentage scaling available.
How large of an image can I use?
Up to 10MB per file, resolution limit 4000×4000px.
Are images uploaded to a server?
No. All processing happens locally in your browser. Images never leave your device.
Can I process multiple images at once?
Supports batch resizing of multiple images.