Font Freezer

Freeze OpenType features and variable-font axes permanently into any font — no CSS required at render time.

The Problem

Many design tools, older software, and email clients do not fully support CSS font-feature-settings or variable font axes. If you want to use a specific feature (like tabular numbers, small caps, or alternate glyphs) everywhere, you need them baked directly into the font file.

The Solution

Font Freezer analyzes your font, extracts the exact OpenType rules you want, bakes them permanently into the font's character map, and returns a new <Family> Frozen.woff2 file.

The resulting font will look exactly as you intended, by default, in any software.

Features

OpenType Freezing: Bake smcp, onum, tnum, ss01, zero, and more.
Variable Font Pinning: Freeze specific weights (wght) and widths (wdth) into static files.
Format Conversion: Convert freely between TTF, OTF, WOFF, and WOFF2.
Google Fonts Integration: Search, analyze, and process any Google Font on the fly.

🤖 AI Integration (MCP)

Font Freezer is officially integrated into the Model Context Protocol (MCP) via the Smithery registry. You can give your AI agents (Claude, Cursor, Windsurf) the ability to analyze and freeze fonts directly in your workspace!

How to Install

Option 1: Quick Install (Claude Desktop & Windsurf)

Use the auto-installer via Smithery:

npx -y @smithery/cli install fontfreezer/app --client claude

Option 2: Universal Configuration (Action Required for Cursor, Antigravity, Cline)

For agents that do not support automated Smithery CLI installation, you must manually add Font Freezer to your agent's MCP configuration file (e.g. cline_mcp_settings.json or Cursor's MCP settings panel).

Add the following JSON to your mcpServers configuration:

{
  "mcpServers": {
    "fontfreezer": {
      "type": "sse",
      "url": "https://mcp.fontfreezer.com/sse"
    }
  }
}

Note: Font Freezer is a managed cloud service. This configuration connects your agent directly to our secure SSE endpoint without requiring any local Python or Node package installations.

Try it with your AI

Once installed, ask your agent things like:

"Analyze the Inter font and tell me what features it supports."

"I need Roboto Mono. Freeze the tabular figures (tnum) and slashed zero (zero), and save it as a WOFF2 file in my assets/ folder."