Image Resizer
Resize & convert images to PNG — locally, under the stars
Resize images individually
Drop images, set custom sizes, and download them as PNG — free on MacigHub.
Drop your images here
or click to browse — PNG, JPEG, WebP supported
How this works
Individual Control
Each image gets its own card. Set completely different dimensions for every image.
Aspect Ratio Lock
Change the width, and the height auto-updates to maintain the original shape.
100% Private
All rendering happens locally in your browser. No file is ever uploaded.
All processing happens locally in your browser. No data is uploaded.
About this image resizer
What it does
Resize one image or a whole batch to exact dimensions, lock aspect ratio per image, and download everything as PNG. Each image gets its own card with independent settings — batch work without batch compromises.
Examples
- Converting 40 product shots to identical 1200×1200 PNGs.
- Downscaling screenshots for documentation and tickets.
- Preparing uniform avatars and thumbnails.
Limitations
- Output is PNG only; convert to JPEG/WebP afterwards if size matters more than fidelity.
- Upscaling cannot invent detail — enlarging small images softens them.
- Very large batches consume memory; work in groups on modest devices.
Frequently asked questions
Will quality suffer?
Downscaling with proper resampling preserves visual quality well. Avoid repeated re-compression cycles.
Is there a file limit?
No artificial limits — your browser memory is the only ceiling. Process large sets in batches.
Do my images get uploaded?
No. Rendering happens entirely in your browser; files never leave your device.