Skip to main content
floow.designfloow.design

Font Pairing Tool

Try heading and body font combinations at real mobile sizes before committing.

Preview pairings freeSign up to copy the font stackNo usage limits

Today

Build a habit that survives a bad week

Streaks are motivating right up until you miss one. This screen is deliberately set at the width and size a phone actually uses, so you can judge the pairing where it has to work rather than on a wide desktop specimen.

$1,284.50 · 09:41 · 27 days

Caption text, which is where legibility usually breaks first.

Pick a heading face and a body face and see them together in a realistic mobile layout — a title, a subtitle, a paragraph, numerals and a caption at the sizes they will actually be used.

Type pairings that look striking on a wide desktop specimen often fall apart in a 375px column.

What makes two typefaces work together

A good pairing has one clear point of difference — a serif with a sans, or a distinctive display face with a neutral text face. Two faces that are merely similar read as a mistake rather than a decision. The safest reliable pairing remains a characterful heading face with a plain, highly legible body face.

Body text is where the decision is made

Headings are short and forgiving; body copy is where a typeface either works or exhausts the reader. Judge candidates on a full paragraph at around 15–16px, not on a headline. Check the numerals too — many display faces have poor figures, which shows up immediately in prices, dates and counters.

Fewer fonts ship faster

Every additional face and weight is another file a phone downloads before text renders correctly. Two families at two or three weights each is plenty for almost any mobile app, and the restraint usually improves the design as much as the load time.

How to use the font pairing tool

  1. Pick a heading face with some character, and a plain, highly legible face for body copy.
  2. Judge the pairing on the full paragraph rather than the headline — that is where body faces fail.
  3. Check the numerals, which many display faces handle badly and which show up in every price and date.
  4. Swap the pair to test the inverse; sometimes the more interesting face works better as body copy.
  5. Copy the font stack into your CSS custom properties.

Use it with

  • Type Scale Generator — Build a modular type scale from a base size and ratio, sized for phone screens.
  • Contrast Checker — Test any foreground and background pair against WCAG AA and AAA, at both body and large text sizes.
  • User Persona Generator — Turn a description of your audience into structured personas with goals and frustrations.

Frequently asked questions

What fonts pair well for a mobile app?
A characterful heading face with a plain, highly legible body face is the reliable formula. The pairing needs one clear point of difference — serif against sans, or display against neutral. Two similar faces read as a mistake.
How many fonts should a mobile app use?
Two families, at two or three weights each. Every extra face is another file the phone downloads before text renders, and the restraint usually improves the design as much as the performance.
Why do these previews use system fonts?
Because a preview that silently falls back to a different face is worse than no preview at all. Every option here resolves on your device, so what you see is genuinely what you get.

Related tools