Shotnest · Library
Inspect a small image before trying to enlarge it
The Shotnest resize helper never enlarges: a 300×200 image stays 300×200 inside a 1200×1200 box, while a 4000×3000 one becomes 1200×900.
How the fitted size is chosen
The resize helper takes a maximum width and height, 1200 × 1200 pixels by default, and computes one scale factor: the smallest of 1, maximum width ÷ image width and maximum height ÷ image height. Because 1 is part of that minimum, the factor can never exceed 1. Large images shrink with their aspect ratio intact; small ones pass through at their own size.
For a 4000 × 3000 photo the factor is 1200 ÷ 4000 = 0.3, giving 1200 × 900. A 1170 × 2532 portrait screenshot is limited by its height: 1200 ÷ 2532, which gives 555 × 1200. A 300 × 200 image keeps a factor of 1.
Check the image before fitting it
- Zoom into the original and read the smallest text you need.
- If characters are already blurred or missing, find a better source or take a new screenshot.
- Set the maximum width and height for where the copy will go.
- Create the result and read the same small text in the downloaded PNG.
- Keep the original; the helper writes a new file and does not change it.
- 4000 × 3000 in 1200 × 1200
- 1200 × 900
- 1170 × 2532 in 1200 × 1200
- 555 × 1200
- 300 × 200 in 1200 × 1200
- 300 × 200
Both maximum values are whole numbers of pixels between 1 and 12000. The result keeps at least 1 pixel on each side, and its total size may not exceed 24000000 pixels.
Misreading a resize
- Expecting a small screenshot to become sharper because the box is larger.
- Shrinking a dense screenshot so far that its text is no longer legible.
- Assuming the output dimensions prove the content is readable.
- Uploading files over 15 MB or larger than 12000 pixels on a side; the helper rejects them.
Pixels cannot be recovered
Enlarging a raster image only spreads existing pixels, which is why this helper does not do it. The resize tool linked below works in the browser tab, produces a fitted copy and makes no claim about improved text recognition or restored detail.