ImgRiver

Resize images instantly — crisp results, zero uploads.

Change width/height, keep aspect ratio, and export in the format you need. All processing happens in your browser.

Private by design Free to start No signup required

or, drag and drop an image here

Max file size: 10 MB

Private by design Free to start No signup required
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Keep Aspect Ratio

Lock proportions automatically as you change one side.

⚡

Fast Pixel Processing

GPU-accelerated scaling for sharp results and smooth previews.

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Exact Dimensions

Type exact width/height or pick popular presets for social & web.

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Multiple Formats

Export PNG, JPG, or WebP with quality control.

🖥️

Batch-Friendly

Resize multiple images one-by-one without page reloads.

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Private by Design

Everything stays on your device — nothing leaves your browser.

How to Resize an Image?

1) Upload

Select or drop an image to start.

2) Set Size

Enter width/height or choose a preset. Toggle “Lock aspect ratio”.

3) Export

Download as PNG, JPG, or WebP with your preferred quality.

Frequently Asked Questions

Scaling can affect sharpness. This tool uses high-quality resampling and offers quality controls (for JPG/WebP) to balance size and clarity.
Enable “Lock aspect ratio” in the resizer. When on, changing width auto-updates height (and vice versa).
Yes, but upscaling can reveal artifacts. Try modest increases for best results or use vector graphics if possible.
Upload PNG/JPG/WebP and export to PNG, JPG, or WebP. JPG/WebP provide adjustable quality to reduce size.
No. All operations happen locally in your browser for maximum privacy.
Make sure it’s an image under 10 MB and that resizer.html is in the same folder as this page so the redirect works.