TTF Builder

A developer-focused tool to create custom TrueType fonts from glyph data, metrics, and kerning rules.

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About This Tool

Purpose-built font creation tool for developers and designers working with custom typography. It accepts font metadata, a glyph set, and optional feature rules to produce a production-ready TrueType font. Conceptually, the tool maps glyph contours to the glyf table, assembles essential font tables, and encodes character mappings for Unicode. The workflow emphasizes correctness, reproducibility, and portability across platforms. Benefits include precise control over units per em, ascent/descent, kerning, and typographic features, enabling consistent rendering on web and desktop environments. Core value lies in automation of complex font-table generation, integrated validation against the TrueType specification, and safe export with traceable metadata. Use cases include corporate branding fonts, multilingual fonts with custom glyphs, and typography exploration for product interfaces. Distinctive features include glyph validation, automated kerning generation from textual samples, and a deterministic export process that minimizes font drift across builds. Typical use scenarios cover brand font production, web font provisioning for large catalogs, and font experimentation for UI systems. This tool targets developers and designers who need reliable, repeatable font creation without manual low-level table editing.

How to Use

  1. Provide inputs: font name, units per em, ascent, descent, and glyph definitions.\n
  2. Optionally add kerning, features, and subset rules.\n
  3. Run the build to emit a .ttf file as a base64 string or downloadable asset.\n
  4. Validate the produced font in your environment and adjust metrics if necessary.\n
  5. Integrate the font into web or desktop projects with confidence.
How to use ttf builder

Frequently Asked Questions

Find Quick Answers

What inputs are required to start a build?
At minimum, provide a font name, units per em, ascent, descent, and a glyph set with codepoints. Additional data like kerning pairs and typographic features improve fidelity and render quality.
Can I include custom kerning and features?
Yes. The tool accepts kerning pairs and GSUB/GPOS feature lists as optional inputs, allowing refined spacing and advanced typographic behavior in the produced font.
What formats are produced and how can I retrieve them?
The primary output is a TrueType font (.ttf). The tool returns a base64-encoded font string and an optional filename for download, suitable for immediate integration.
Are there limits on glyph counts or codepoints?
Limits are dependent on runtime resources. Common guidance is to subset to essential glyphs for performance, while large hyper-complete fonts may require staged builds.

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