Free Online Image Resizer

Change image dimensions in pixels or percentages while locking aspect ratio. Fast, client-side, and free.

Upload Image to Resize
Drag and drop here or click to browse
Supports JPG, PNG, and WebP
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About Free Online Image Resizer

Scale image dimensions precisely for social media headers, blog thumbnails, profile avatars, and printing. Adjust width and height by exact pixels or percentage while maintaining perfect aspect ratios.

How to Use Free Online Image Resizer Online

1
Upload Your Picture
Drop your photo into the resizer box or browse your local file system to load it.
2
Set Width & Height
Enter target pixel dimensions or choose a scale percentage. Toggle the aspect ratio lock to prevent distortion.
3
Select Output Format
Choose whether to export as JPG, PNG, or WebP depending on your transparency and compression needs.
4
Export Resized Image
Click Resize Image to render the new dimensions and download your optimized image asset.

Key Features & Privacy Benefits

  • Aspect Ratio Lock: Prevent distorted or squished images with automatic proportional height and width recalculation.
  • Dual Scaling Modes: Specify exact pixel dimensions (e.g. 1200x630 for social cards) or quick percentage reductions (25%, 50%, 75%).
  • Multi-Format Export: Output directly to JPEG, PNG, or modern WebP format without needing third-party photo editing software.
  • Zero Quality Degradation: Utilizes high-quality bicubic interpolation algorithms to ensure clean edges and sharp details.

Frequently Asked Questions

Keep the 'Maintain Aspect Ratio' toggle enabled. When enabled, adjusting either width or height automatically calculates the corresponding dimension proportionally.
Yes. You can enter standard dimensions such as 1200x630 (Facebook/LinkedIn preview), 1080x1080 (Instagram square), or 1280x720 (YouTube thumbnail).
No. The entire resizing process executes locally on your device via HTML5 Canvas. Your photos are not uploaded to any remote server.

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