Make a letter icon set in IBM Plex Serif and download it as SVG, PNG or a complete favicon package — the letters are vectorized, so nobody needs the font installed to see your mark.
A serif built on the Plex Sans skeleton, so the serifs feel bolted onto a grotesque rather than grown from a pen.
The letter A set in IBM Plex Serif at weight 600, vectorized with opentype.js. Drag it to reposition, then download.
ABCDEFGHIJKLM
NOPQRSTUVWXYZ
abcdefghijklmnopqrstuvwxyz
0123456789 & @ &
A serif built on the Plex Sans skeleton, so the serifs feel bolted onto a grotesque rather than grown from a pen. That makes it a natural fit for tech brands that want a serif without losing the engineered feel.
Slab serifs are the most robust serif class for icon work. Because the serifs are rectangular and carry the same weight as the stems, they do not thin out and disappear the way bracketed serifs do — they simply become part of the silhouette. That makes a slab a genuinely good choice for otherwise weak letters such as I, L and T, where the slabs supply the horizontal information that identifies the letterform. Watch the extra width: rectangular serifs add measurable width on both sides, so already-wide capitals get tight in a square container.
The blunt serifs read as noise at 16px; consider Plex Sans instead for favicons.
A favicon is rendered at 16 × 16 pixels. That is roughly the area of a single character of this paragraph, and it is where most typographic decisions stop mattering and start breaking. The reliable test is not to zoom out of a large preview — browsers resample that far more kindly than a real favicon pipeline does — but to export the actual favicon.ico and look at it in a browser tab.
The preview above is not text with a CSS font-family applied to it. The editor loads the IBM Plex Serif TTF from Google Fonts, parses it with opentype.js, and converts the glyph into an SVG <path> at weight 600. IBM Plex Serif covers a usable weight range, so you can dial the mark heavier for small sizes and lighter for large ones without changing the letterform. Because the export contains outlines rather than text, the mark renders identically for every visitor whether or not they have the font, and it stays crisp at any size.
Open the free editor with IBM Plex Serif and 900+ other Google Fonts. Change the weight, spacing, colours and corner radius, then export SVG, PNG, ICO or a complete web icon package.
Open the IBM Plex Serif icon editorOther faces in and around the slab-influenced serif category.