Image Resizer · Complete guide
How to use the Image Resizer
Downscale or upscale images to exact dimensions in your browser. No signup, no watermark.
What does the Image Resizer do?
Downscale or upscale images to exact dimensions in your browser. No signup, no watermark.
It's part of the MagicBG toolbox— a suite of free, browser-based utilities that never upload your files anywhere.
Why use this tool?
- Meet exact marketplace dimension requirements
- Prepare social media assets at the correct size
- Downscale huge camera exports before sharing
How it works
- 1
Upload the image you want to resize.
- 2
Type new dimensions or a percentage — aspect ratio can stay locked.
- 3
Download the resized image at full quality.
Features
- Resize by pixels or percentage
- Optional aspect-ratio lock
- Preserves original format
- Client-side and private
Best use cases
- Amazon 2000 × 2000 product photos
- Instagram 1080 × 1350 posts
- LinkedIn banner 1584 × 396
Pro tips for the best results
- Never upscale beyond 2× — you'll see softness.
- Resize before compressing for the best size/quality ratio.
- Match the platform's exact dimensions to avoid auto-crop.
Frequently asked questions
Will resizing hurt quality?
Downscaling is safe. Upscaling adds no new detail — for real upscaling you'd need an AI upscaler.
Ready to try the image resizer?
Free, private, no signup. Runs in your browser — your files never leave your device.
Open the image resizerExplore every utility in the free tools directory.