Resize Image by Percentage – Free Online Tool
Resize images by percentage. Scale your photos up or down while maintaining aspect ratio.
Example Output
Proportional resize — half of each dimension, quarter of pixel count.
960×540 image
What is Resize Image by Percentage?
Resize Image by Percentage shrinks (or enlarges) an image proportionally based on a percentage you pick. Useful for batch-resizing photos to a consistent fraction, generating thumbnails, or scaling down screenshots without working out exact pixel targets.
Why use this tool?
- Your data stays private — all processing happens locally in the browser
- No telemetry, no tracking pixels, no third-party scripts
- Open-and-go: bookmark the page once and never look for an alternative
- Supports PNG, JPG, WebP, GIF, and SVG with consistent quality across formats
- Your original file is never uploaded — sensitive screenshots stay on your device
How to use
- Drop an image (or batch)
- Type a percentage: 50 to halve, 200 to double, 25 to quarter
- Aspect ratio preserved automatically
- Download the resized result
Examples
Half-size thumbnails
Pass a folder of 2400 px photos through "50%" — all become 1200 px, aspect ratio intact, ready for a gallery.
Quick-shrink screenshots
4K screenshots at 25% = 1080p, much friendlier to email or chat attachments.
Common use cases
- Batch thumbnail generation at a fixed ratio
- Shrinking screenshots/photos by a known proportion
- Producing retina/non-retina pairs (100% / 50%)
Troubleshooting
- Output is blurry after enlarging beyond 100%.
- Browser canvas scales using bilinear interpolation — fine for downscaling, soft for upscaling. For sharp upscales, use a dedicated AI upscaler.
Frequently Asked Questions
Upload your image, select a preset percentage or enter a custom value, and click Resize. The image will be scaled proportionally. For example, 50% reduces the image to half its original dimensions.
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