Resize a set of icons to multiple standard sizes (16, 24, 32, 48, 64, 128, 256) in one batch.
Icon Set Resizer takes one or more icon images and makes a size ladder for each source: 16, 24, 32, 48, 64, 128, and 256 pixels. It is intended for producing repeated square-size assets in one pass instead of resizing each file separately. The work stays in the browser, so the selected icon files are not uploaded. The important surprise is that dimensional resizing is not optical redesign: a detailed mark that is clear at 256 pixels may become muddy or unreadable at 16 pixels.
A concrete input and expected output from the current implementation.
Input
One square icon file named compass.png, 512 x 512 pixels.
Expected output
Seven resized images of the compass icon: 16 x 16, 24 x 24, 32 x 32, 48 x 48, 64 x 64, 128 x 128, and 256 x 256 pixels.
There is one output for each of the seven fixed target sizes. All seven are downscaled because 512 is larger than the greatest target dimension, 256.
For every source icon, the batch expands into the same seven target dimensions. A batch of n icons therefore represents 7n resized variants: two source icons produce 14 size variants, while five produce 35. The operation changes image dimensions only; it does not create alternate artwork tailored to the visual constraints of each size.
Resizing maps the source artwork into progressively smaller or larger pixel grids. Downscaling necessarily removes source detail, while upscaling cannot restore genuine edge detail that was absent. Because the files are handled in the browser, the originals do not need to leave the device. Review transparency, edges, and fine strokes in the generated files rather than judging only the largest version.
It creates the seven dimension variants named by the tool, which can supply images for those workflows. Resizing alone does not provide required filenames, manifest entries, masks, or platform-specific metadata. If the destination requires an ICO container, adaptive icon layers, or a prescribed directory structure, that work remains a separate step.
No. A larger, clean source provides more pixel information for the larger targets and avoids enlarging a tiny raster. Even then, inspect the 16 x 16 and 24 x 24 results at actual size. Simplified small-size artwork may still be necessary when the original contains fine detail, narrow gaps, or text.
The example and behavioral notes were checked against the browser implementation. Standards and primary references below define the relevant format, formula, or platform behavior.
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