A developer documentation page lives or dies on its code blocks, and that is where IBM Plex Mono earns its keep. Mike Abbink drew it with the team at Bold Monday, and the result is a monospace that holds up when a line of syntax runs long. The Regular weight is the workhorse here, though the family ships as 16 files covering multiple weights and styles, so you can separate comments from keywords, or set a caption that still belongs to the same voice as the code above it.

Beyond code itself, it does honest work in API reference documentation, terminal screenshots for a product launch post, engineering spec sheets where figures need to stack in even columns, and data tables inside an analytics dashboard. Coverage runs past 325 Latin-based languages, which matters when your docs get localized and you would rather not swap faces halfway down the page. The fixed widths also make it a quiet choice for interface labels that change length as values update, since nothing shifts around when a number grows a digit.

One practical note: at display sizes, say a section heading or a hero line, pull the tracking in a touch, because monospaced widths leave gaps that start reading as loose once the type gets big. At normal text sizes, leave the spacing alone and give it a slightly generous line height instead. Open license, commercial use allowed, direct download below.