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Typography Controls

Montserrat
76
normal
0
0
none
center
none
100
400
900
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Hello
Cap lineBase line
Median lineBase line
Ascent lineDescent line
Top lineBottom line
Montserrat
|
Variable (1 axe)
|
18 Styles
Cap-Height:
51px
X-Height:
34px
Text-Height:
54px
Line-Height:
84px
Whereas recognition of the inherent dignity
No one shall be held in slavery or servitude; slavery and the slave trade shall be prohibited in all their forms.
Everyone has the right to an effective remedy by the competent national tribunals for acts violating the fundamental rights granted him by the constitution or by law.
Hello
Cap lineBase line
Median lineBase line
Ascent lineDescent line
Top lineBottom line
Roboto
|
Variable (2 axes)
|
18 Styles
Cap-Height:
54px
X-Height:
40px
Text-Height:
59px
Line-Height:
101px
Whereas recognition of the inherent dignity
No one shall be held in slavery or servitude; slavery and the slave trade shall be prohibited in all their forms.
Everyone has the right to an effective remedy by the competent national tribunals for acts violating the fundamental rights granted him by the constitution or by law.
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Compare Google Fonts Side-by-Side — Font Comparison Tool, Font Pairing, Variable Axes & Live Preview

Preview Version: FontsDiff is live and actively improved based on real designer feedback.

What is FontsDiff?

FontsDiff is a powerful Google Fonts Tester and Font Comparison Tool that lets you preview, compare, and test all Google Fonts side by side in one unified interface. Designed for designers, developers, and typography enthusiasts, FontsDiff allows you to enter your own text, adjust typography settings, and confidently choose the perfect font combination for websites, branding, and design projects.

Why Use FontsDiff?

  • Font Comparison Tool – Compare Google Fonts side by side and see real differences instantly.
  • Font Pairings – Experiment with font combinations to find the perfect match.
  • Variable Fonts – Adjust axes like weight, width, slant & more for full typography control.
  • X-Height and Cap-Height Typography – Gain precise insights into font proportions.
  • Glyphs – Inspect font characters, ligatures, and glyph coverage in detail.
  • Font Specimens – Preview font styles, weights, and typographic variations.
  • Auto-Sync with Google Fonts – New fonts are added to FontsDiff automatically within 24 hours.
Screenshot of Fontsdiff.com's Google Fonts Tester interface showcasing font comparison, pairing, variable font axes, X-Height, Cap-Height, and other preview features.
Screenshot of Fontsdiff.com's Google Fonts Tester interface showcasing arabic font comparison, pairing, variable font axes, X-Height, Cap-Height, and other preview features.

How to Use FontsDiff

FontsDiff is designed to make font comparison simple, visual, and interactive. Use these tools and tabs to explore, compare, and analyze Google Fonts effectively.

Add & Manage Cards

  • Use the Add Card button to add up to 5 cards for comparison.
  • Scroll horizontally to navigate between cards.
  • Drag a card from its top bar to reorder or reposition it.
  • Each card shows Cap-Height, X-Height, Text-Height, and Line-Height to visually compare typography proportions.

Tester Tab – Edit & Compare Text

  • Press Enter to add a new text row.
  • Press Backspace on an empty row to remove it.
  • Adjust font properties using Typography Controls.
  • Compare alignment using each card’s Cap-Height, X-Height, Text-Height & Line-Height indicators.

Sync Mode (Tester Tab Only)

Sync Mode applies only to the Tester tab.

  • Sync Off – Edit each card independently.
  • Sync On – Content & style changes mirror across all cards (font family remains independent).

Load Font’s Regional Script is available only when Sync Mode is enabled.

  • Enabled – Switching fonts replaces text with a region-appropriate script.
  • Disabled – Your custom text remains preserved when switching fonts.

Glyphs Tab – Compare Character Shapes

  • Compare glyph shapes side-by-side across all cards.
  • Enable Hoverview to preview the same glyph in every card while hovering.
  • Disable Hoverview to preview glyphs manually by clicking.

Specimen Tab – Analyze Font Styles

  • Explore each font’s available styles and specimens.
  • Use Type Something to preview your own custom text.
  • Adjust the Font Size slider to resize specimen text across all cards at once.

Key Features:

Free Font Tester – Compare, Pair & Play

Test, explore, and compare Google Fonts online without installing anything. Whether designing for the web or mobile, FontsDiff provides a seamless font testing experience in a single interface.

Popular use case: Designers use FontsDiff to compare Google Fonts before finalizing UI and branding typography.

  • Live Font Preview & Customization
  • Real-Time Font Size & Weight Adjustments
  • Perfect for Web, UI/UX & Graphic Design

Typeface Exploration – Discover & Test Google Fonts

FontsDiff offers an extensive Google Fonts preview tool that automatically updates with new fonts. Stay ahead with the latest typography trends and experiment with hundreds of font styles effortlessly.

  • Instant Access to Google’s Latest Fonts
  • Preview Fonts with Custom Text & Backgrounds
  • Perfect for Designers, Developers & Content Creators

Variable Font Tester – Full Typography Control

Modify fonts like never before with variable font axes adjustments. Test weight, width, slant, and advanced axes like BNCE, INFM, SPAC to customize typography for your project.

  • Fine-tune Font-Variation Settings
  • Supports All Google Variable Fonts
  • Ideal for Advanced Typography Experiments

X-Height & Cap-Height Typography – Precision Analysis

Typography isn’t just about style—it’s about precision. FontsDiff provides detailed X-height and Cap-height data for every Google Font, allowing you to choose fonts with the perfect proportion for readability and aesthetic balance.

  • Side-by-Side Font Height Comparison
  • Optimize Readability for Web & Print
  • Essential for Professional Typography

Font Pairing Tool – Create Perfect Combinations

Struggling with font pairing? Our Font Pairing Tool helps you mix and match fonts seamlessly, ensuring visually harmonious typography. Fine-tune font properties with a user-friendly controller, similar to design tools like Figma & Abstract.

  • Find the Best Font Pairings Instantly
  • Customize Spacing, Weight & Styles
  • Ideal for Branding, Editorial & UI Design

Sync Mode – Intelligent Font Testing

Enable Sync Mode to apply content changes across all comparison cards while maintaining unique font families. This makes multi-font testing more efficient, especially when evaluating different typography options in one view.

  • Edit Once, Apply to All Cards
  • Streamlined Font Testing for Large Projects
  • Maintain Font Family Uniqueness While Syncing Content

Glyph Exploration – Dive Into Font Characters

Need to explore individual font characters? Our Glyph Exploration Tool lets you analyze unique glyphs, ligatures, and stylistic alternates in every Google Font. Perfect for logo design, branding, and creative typography.

  • Inspect Full Character Sets
  • Supports Advanced OpenType Features
  • Great for Multilingual & Custom Typography Projects
Screenshot of Fontsdiff.com's Google Fonts Tester interface showcasing fonts glyphs comparison.

Specimen Exploration – Discover Font Weights & Styles

Get a full breakdown of each font’s available styles and weights before choosing one. Our Specimen Explorer makes it easy to see how different font styles impact readability and aesthetics.

  • Preview Font Weights & Styles
  • Understand Font Hierarchies for Better Design
  • Great for UI/UX Designers & Developers
Screenshot of Fontsdiff.com's Google Fonts Tester interface showcasing font specimens comparison.

Playground Mode – Mix & Match Fonts Freely

Want to see how different fonts look together? Playground Mode lets you assign different Google Fonts to each line within a single comparison card.

  • Visualize Font Combinations in Real-Time
  • Test Headings, Subheadings & Body Text Together
  • Perfect for Typography Research & A/B Testing
Screenshot of Fontsdiff.com's Google Fonts Tester interface showcasing Playground.

Latest Sync Updates: New Font Families and Variable Axes Added

Sep 20, 2026

Variable Axes: None

Font Families: Asap Sharp, Caacupe One, Scoutie Sans, Valley Sans

Jul 27, 2026

Variable Axes: None

Font Families: Geist Pixel, Geomini, Hibur Mono, Montenegrin Gothic One, Yuyu, Yuyu Short

Jun 25, 2026

Variable Axes: None

Font Families: Akt, Alien Block, Estedad, Finlandica Headline, Finlandica Text, M PLUS U, Pliant, Strichpunkt Sans

May 11, 2026

Variable Axes: None

Font Family: STIX Two Math

Apr 23, 2026

Variable Axes: None

Font Family: BJCree

Apr 13, 2026

Variable Axes: None

Font Families: BJ Cree, Miranda Sans, Saira Stencil

Mar 12, 2026

Variable Axes: None

Font Families: Allkin, Alyamama, Betania Patmos, Betania Patmos GDL, Betania Patmos In, Betania Patmos In GDL, Bpmf Huninn, Bpmf Iansui, Bpmf Zihi Kai Std, Datatype, Gveret Levin, Idiqlat, Iosevka Charon, Iosevka Charon Mono, Ramsina

Feb 2, 2026

Variable Axes: None

Font Families: LINE Seed JP, Playwrite NZ Basic, Playwrite NZ Basic Guides, SN Pro

Dec 16, 2025

Variable Axes: CTRS

Font Families: Amarna, BBH Bartle, BBH Bogle, BBH Hegarty, Cause, Elms Sans, Geom, Google Sans, Google Sans Flex, Kedebideri, Lilex, Momo Signature, Momo Trust Display, Momo Trust Sans, Noto Sans Syriac Western, Science Gothic, Sekuya, Stack Sans Headline, Stack Sans Notch, Stack Sans Text

Oct 7, 2025

Variable Axes: SZP1, SZP2, XPN1, XPN2, YPN1, YPN2

Font Families: Alan Sans, Asimovian, BBH Sans Bartle, BBH Sans Bogle, BBH Sans Hegarty, Bitcount Grid Double Ink, Bitcount Grid Single Ink, Bitcount Ink, Bitcount Prop Double Ink, Bitcount Prop Single Ink, Bitcount Single Ink, Chiron GoRound TC, Cossette Texte, Cossette Titre, Epunda Sans, Epunda Slab, Libertinus Keyboard, Libertinus Serif Display, SUSE Mono, Sirivennela, Story Script, TASA Explorer, TASA Orbiter, Tirra, Vend Sans, Zalando Sans, Zalando Sans Expanded, Zalando Sans SemiExpanded

Aug 21, 2025

Variable Axes: None

Font Families: Google Sans Code, Libertinus Sans, Libertinus Serif, Mozilla Headline, Mozilla Text, Nata Sans, TikTok Sans

Jul 19, 2025

Variable Axes: None

Font Families: Bitcount, Bitcount Grid Single, Bitcount Prop Double, Bitcount Prop Single, Bitcount Single, Intel One Mono

Jul 2, 2025

Variable Axes: ELXP

Font Families: Alumni Sans SC, Asta Sans, Bitcount Grid Double, Chiron Hei HK, Chiron Sung HK, Edu NSW ACT Cursive, Edu NSW ACT Hand Pre, Edu QLD Hand, Edu SA Hand, Edu VIC WA NT Hand, Edu VIC WA NT Hand Pre, Huninn, LXGW Marker Gothic, Libertinus Math, Libertinus Mono, Manufacturing Consent, Matangi, Menbere, Noto Sans Sunuwar, Parastoo, Savate, UoqMunThenKhung, WDXL Lubrifont JP N, WDXL Lubrifont SC