Best fonts for developer documentation
Fonts that keep long technical content readable and scannable.
Shortlist
Pairings that work
Marcellus + IBM Plex Sans
Open pairing →Bonny + Noto Serif
Open pairing →Crimson Pro + IBM Plex Sans
Open pairing →CSS starter
A safe baseline you can paste into a project.
:root{\n --font-body: system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, sans-serif;\n --font-headings: var(--font-body);\n}\n\nbody{font-family:var(--font-body);font-size:16px;line-height:1.6}\nh1,h2,h3{font-family:var(--font-headings);line-height:1.12}
FAQ
Should I use one font or two?
One font can be enough. If you use two, keep roles clear: one for headings and one for body.
How many weights should I load?
Usually 2 weights (400 and 700) are enough. Only add more if your UI truly needs them.
Is it okay to use system fonts?
Yes. System fonts are fast, license-safe, and great for dashboards and documentation.