Typography is part of the interface system. It affects how quickly a page can be read, whether a dense dashboard feels manageable, and how consistently designers and developers can build new screens.
There is no universal best font. A useful interface family remains clear at small sizes, includes the required weights and characters, has a suitable license, and can be loaded without delaying the page.
Reliable starting points
Inter is a safe choice for Latin dashboards, forms, numbers, and tables. Cairo is a practical Arabic family for services, education, stores, and long content. IBM Plex Sans Arabic suits technical and institutional products with dense information. Noto Sans Arabic provides broad script coverage. Tajawal gives Arabic interfaces a softer voice.
These are starting points, not rankings. Test the family with the product’s real content before deciding.
Pair scripts by visual behavior
Do not pair fonts only because their names look good together. Compare the apparent size, stroke density, line height, numeral shapes, punctuation, and available weights.
An Arabic family at 16 pixels may look larger or smaller than its Latin partner. Adjust size and line height by language when needed. Keep the hierarchy consistent even when the numeric values differ.
For a restrained technical system, Cairo with Space Grotesk can work when Arabic carries body content and the Latin family handles English headings. IBM Plex Sans Arabic and IBM Plex Sans reduce the gap because they belong to one broader family.
Separate interface and display roles
A distinctive display font may suit large headings but fail in table cells, buttons, or long paragraphs. Choose the body family first. Add a display family only if it contributes to the brand without introducing extra layout and loading cost.
The interface should not need three unrelated families to feel designed. Weight, size, spacing, and color can create a strong hierarchy within one or two families.
Load only what the product uses
Prefer WOFF2 files and subset by script when the build and license allow it. Request only the weights used by the design system. Preload the body font only when the page needs it immediately.
Self-hosting can improve privacy and dependency control. It also makes you responsible for file updates, cache headers, and correct licensing. A hosted font service can be simpler, but it adds a third-party request and may conflict with a strict privacy policy.
Define fallbacks that preserve layout reasonably. Use font-display: swap or another intentional strategy so invisible text does not block reading.
Test real states
Create a typography specimen from the product, not a poster. Include a long Arabic heading, body paragraphs, navigation, buttons, validation errors, dates, prices, mixed Arabic and English names, and a dense table.
Review at 320 and 390 pixels as well as desktop. Check browser zoom, text scaling, bold weights, diacritics, and strings from localization. A family that looks elegant in a hero may become tiring across a help article.
Turn the decision into tokens
Store font families, sizes, weights, line heights, and letter spacing as shared tokens. Name them by role, such as body, label, heading, and code, rather than by a single page.
The best typography choice is the one the team can apply consistently and users can read without noticing the system fighting them.