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Image Resizer
Resize by pixels or percentage.
Free tools that run in your browser. Nothing you type, open or create is uploaded to NerdBible or anyone else.
How to use it
- Choose or drop an image.
- Type the new width or height (the other follows when Keep proportions is ticked), or switch to By percentage and pick a scale.
- Choose the file type and press Resize and download.
Questions
Are my images uploaded?
No. The image is resized by your browser on your device and the new file is created there too.
Why does a shrunk image stay sharp?
Big reductions are done in steps, halving the size each time before the final size. Jumping straight from a large photo to a small one skips pixels and looks jagged.
Can I make an image bigger?
Yes, but enlarging cannot add detail that was never there, so a much larger copy will look soft. For a sharp result, start from the largest original you have.
Which format should I pick?
JPG for photos, PNG for screenshots, logos and anything with transparency, and WebP when you want a smaller file for a website. JPG has no transparency, so clear areas turn white.
About this tool
Resizing an image without losing sharpness
Photos from phones are often 4000 pixels wide or more, far larger than a website, an email or a form upload needs. This resizer makes them the size you ask for and saves a new file.
Two ways to set the size
- By pixels: type a width or a height. With Keep proportions ticked, the other side follows so nothing is stretched.
- By percentage: pick a scale such as 50% to halve both sides.
Then choose JPG, PNG or WebP and download.
Why the result stays crisp
Shrinking a large photo in one jump skips pixels and leaves jagged edges. This tool reduces big images in steps, halving the size each time before the final pass, which keeps fine detail smooth.
Which format to choose
JPG suits photos. PNG suits screenshots, logos and anything with transparency. WebP makes smaller files for websites. JPG has no transparency, so clear areas turn white.
Making images bigger
You can enlarge an image, but no resizer can add detail that was never captured, so a much larger copy looks soft. Start from the largest original you have.
The image is resized on your device; nothing is uploaded.
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