Function icon set: what to use when a classic pack is unavailable

The Function icon set belonged to an era of small, detailed raster graphics: a folder looked like a miniature folder, and an address book often had a spiral binding. Many old websites still depend on that visual vocabulary.

The original 128-icon archive has not been recovered for this edition. There is no verified original download on this page, and the historic phrase “completely free” is not a license grant for files obtained elsewhere. If you find a copy, look for its original author, readme, and redistribution terms.

Pick a replacement by function

For a maintained interface, start with Lucide, Bootstrap Icons, or Tabler Icons. These are alternatives, not reissues of the Function artwork.

Map the old files to actions before changing them. disk.png might mean save, export, or backup depending on its context. Give the replacement a semantic name such as export-file instead of carrying the old filename into a new component.

Replace a set consistently

Create an inventory of every place the pack appears. Group toolbar icons, status indicators, and decorative images separately. Replace a complete group at a time so a single toolbar does not mix glossy raster images with thin monochrome outlines.

Retain visible labels during the migration. If an old image was the only accessible name on a link, make sure the replacement still names the destination. Decorative SVGs can use aria-hidden="true"; the control itself needs a text label or an accessible name.

Preserve assets you are entitled to use

If you already have a licensed copy, keep the original readme with your source archive and back up the unmodified assets. Do not upscale a 16-pixel bitmap and expect it to look sharp on a high-density display. Use it at an appropriate size or replace it with a properly designed vector alternative.

The icon collection guide is a better starting point for a new project than an unverified mirror of a historic ZIP file.