Zoven

Image Resizer

Resize images online, change dimensions and scale

What is the Image Resizer?

The image resizer works like this: it resizes images by pixels or percentage with aspect-ratio locking, batch support and format conversion. Everything happens on your device - the input never leaves your tab unless the tool clearly states it performs a server-side lookup.

How to use the Image Resizer

1. Select or drop your image.
2. Adjust the available settings while watching the preview.
3. Check dimensions, quality and format before exporting.
4. Download the result and keep the original when quality matters.

Features

• Runs on your device via the Canvas and WebAssembly APIs
• Batch-friendly when you have several files
• Original images stay untouched

Common mistakes to avoid

• Over-compressing images that contain small text
• Exporting transparency to JPEG

Examples

Input	Result
4000×3000 → 1920 wide	1920×1440 output, aspect preserved, ~5x smaller file

Best used for

• Getting a reliable answer for image resizer without installing an app
• One-off tasks done in under a minute from any device
• Checking results before committing them to something important
• Working on a phone where desktop software is unavailable

Privacy

Images are processed on your device; nothing is uploaded unless a tool explicitly says a server lookup is involved.

Frequently asked questions

Should I upscale?

Upscaling invents no detail - only downscale for real results, or use dedicated AI upscalers for restoration.

How does aspect-ratio locking work?

Change one dimension and the other follows proportionally - the photo never gets squashed, which is the default mode and almost always what you want.

Is resizing by percentage better than by pixels?

Same result mathematically - percentage is simply convenient when the target is "half the size" rather than a specific dimension.

More like this

Zoven offers 200+ free browser tools. Browse by category - Calculators, Converters, Generators, Developer Tools and Media Tools - or read workflow guides on the Zoven blog.