Fontjoy is a browser-based typography tool designed to help designers and developers quickly find effective font combinations. It uses a neural network to analyze visual characteristics of fonts—such as weight, contrast, and style—and generate pairings that balance similarity and contrast.

The platform provides a simple interface where users can generate font combinations with a single click. Typically, it suggests a trio of fonts (e.g., heading, subheading, and body text), allowing users to preview how they work together in real time. Users can lock specific fonts they like, adjust similarity using a slider, or manually edit selections to refine results.

Fontjoy solves the common challenge of font pairing, which often requires design intuition and trial-and-error. By leveraging machine learning, it automates this process and provides quick, usable suggestions, especially helpful for non-designers or those working under time constraints.

The tool primarily uses fonts from the Google Fonts library, making all generated combinations easy to implement in web projects. It is free to use and requires no installation, making it accessible for rapid experimentation and prototyping.

Key features include:

• AI-generated font pairings using deep learning
• One-click generation of font combinations
• Ability to lock and edit individual fonts
• Adjustable contrast/similarity control
• Real-time text preview with editable content

Common use cases include:

• Designing website typography
• Creating brand identities
• Selecting font combinations for UI/UX projects
• Prototyping layouts
• Learning typography pairing principles

Fontjoy was created by Jack Qiao as an experimental project exploring machine learning applications in typography.