Resize Image
Free online image resizer: set custom dimensions or scale proportionally. Supports JPG, PNG and WebP. Runs in your browser — no upload.
About this tool
Quickly change the width and height of an image, with optional aspect-ratio lock. Whether you need thumbnails, exact dimensions for a website, or a smaller file, it all happens in your browser — no software to install.
How to use
- Click or drag to select an image
- Enter the target width or height (the other is computed when ratio is locked)
- Preview the resized result
- Click download to save the image
FAQ
Will upscaling stay sharp?
Enlarging a bitmap loses sharpness. Prefer downscaling, or only small enlargements. For lossless upscaling you need an AI super-resolution tool.
How do I avoid distorting the image?
Keep "Lock aspect ratio" on and change only width or height — the other dimension is calculated automatically.
Does the output format change?
The original format is kept by default, and you can also choose a different output format.
Can I use an iPhone HEIC or HEIF photo?
Yes. HEIC and HEIF photos are decoded locally in supported modern browsers and exported as JPG, PNG or WebP.
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