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. The on-device tools process your image in your browser and do not upload it. AI features such as photo analysis and listing copy use a remote AI provider; see our AI policy.
This tool runs in your browser.
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. This tool runs in your browser and does not upload your image.
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