Pairing two typefaces is one of the quickest ways to give a website character, and one of the easiest ways to make it look disorganised. The good news is that successful pairings follow a few dependable principles. This guide explains them and shows how to test a combination before you use it.
Do you need two fonts at all?
A single well-designed family with a range of weights can carry an entire website. Using one family guarantees harmony and keeps loading fast. Consider a second family when you want headings to have a distinctly different voice, for example a warm serif above a neutral sans-serif, or an expressive display face for a brand.
If you do pair fonts, two is almost always enough. A third family, typically a monospace for code, should have a clear, separate job.
Principle 1: contrast, not conflict
The heading and body fonts should be clearly different. If readers cannot immediately tell which text is a heading, the pairing adds visual noise without adding hierarchy. Two similar sans-serifs, such as two geometric faces with slightly different proportions, usually look like a mistake rather than a choice.
The most reliable source of contrast is classification: a serif with a sans-serif. Other sources include weight (a heavy heading over a light body), width (a condensed heading over a normal-width body) and personality (an expressive display face over a quiet text face).
Principle 2: shared structure
While the fonts should look different, they should feel related. Fonts with similar proportions, such as comparable x-heights and widths, sit together more comfortably. This is why superfamilies, which are designed as a system, are a safe starting point. Examples in our catalogue include:
- Source Serif 4 and Source Sans 3, designed to accompany each other;
- IBM Plex Serif and IBM Plex Sans, from the same superfamily;
- Roboto Slab and Roboto, which share a skeleton;
- Instrument Serif and Instrument Sans, released together by the same designers.
Principle 3: give each font one job
Decide which font is responsible for which elements and stick to it. A common split is: heading font for h1 to h3, body font for paragraphs, lists, buttons, forms and navigation. Mixing the roles, such as using the display font for one random button, weakens the system.
Principle 4: let the body font win the reading test
Heading fonts get attention, but body fonts do the work. A pairing in which the heading looks spectacular and the body text is tiring to read is a bad pairing. Always judge the paragraph at its real size, around 16 to 20 pixels, with real content.
Principle 5: limit weights
Each weight is another file to download and another variation for readers to interpret. A practical set is one or two weights for headings and regular plus bold (and their italics if your content uses emphasis) for body text.
Common pairing patterns
| Pattern | Example from our catalogue | Good for |
|---|---|---|
| High-contrast serif headings, humanist sans body | Playfair Display + Source Sans 3 | Editorial sites, blogs |
| Soft display serif, neutral UI sans | Fraunces + Inter | Product and SaaS sites with personality |
| Superfamily | IBM Plex Serif + IBM Plex Sans | Documentation, technical brands |
| Condensed headings, open body | Oswald + Lato | News, sport, events |
| Sans headings, reading serif body | Figtree + Literata | Long-form articles |
You can load any of these in the Font Pairing Generator, where each curated pairing includes a short explanation.
Mistakes to avoid
- Two fonts with the same role. Two script fonts, or two strong display faces, compete for attention.
- Pairing by name. Fonts with similar names are not necessarily designed to work together. Check the designer and the family’s documentation.
- Ignoring weight balance. A very heavy heading above a very light body can feel disconnected. Adjust weights until the page has an even rhythm.
- Testing only the heading. Always preview the full page: navigation, body text, buttons and captions.
A quick testing routine
- Pick a curated pairing close to the tone you want in the pairing generator.
- Replace the sample text with your own headline and paragraph.
- Swap one font at a time and compare.
- Open the result in the Website Typography Preview and check desktop and mobile views.
- Copy the CSS and loading snippet, keeping only the weights you use.