What is opentype.js?
A library that enables working with OpenType font files in JavaScript, supporting multiple font formats (WOFF, OTF, TTF) and advanced typographic features including kerning, ligatures, color glyphs, and variable fonts.
Platform & deployment
Independently observed- CLI
- Web
Security & compliance
Known vulnerabilities: 0 (0 in the last 12 months) sourcea count reflects scale & disclosure, not quality
opentype.js alternatives
Other font tools we track, ranked by the same independent score.
- FontBaseA free, elegant font management tool for design professionalslow · 26%
- RightFontFont management solution for macOSlow · 26%
- Extensis ConnectCloud-based platform for centralizing font management and licensing across creative teamslow · 26%
- High-Logic MainTypeA desktop font manager for Windows that simplifies organizing, previewing, and installing fonts with professional-grade capabilitieslow · 25%
- TypefaceA font manager for macOS that makes discovering and organizing typefaces intuitive and enjoyablelow · 26%
Compare opentype.js
Side by side against other font tools, attribute by attribute, with a source on every value.
The Vioscale score: one lens on the evidence
Not user reviews and not a paid placement: a confidence-weighted blend of the independent signals below (adoption, activity, security posture, and more), which you can sort and re-weight yourself. Vendors can correct their listing but can never move their rank, and stars are weighted low as a vanity metric. It is one way to read the evidence for opentype.js, not the verdict.
| Signal | Score | Weight | Contribution | Evidence |
|---|---|---|---|---|
| Dependent projects | 68 | 0.06 | 4.3 | ✓ |
| Release cadence | 80 | 0.05 | 4.2 | ✓ |
| Stars | 70 | 0.03 | 1.8 | ✓ |
| Security score | 41 | 0.04 | 1.7 | ✓ |
| Capabilities | 0 | 0.08 | 0.0 | - |
| Integrations | 0 | 0.07 | 0.0 | - |
| Development activity | 0 | 0.09 | 0.0 | ✓ |
| Security posture | 0 | 0.07 | 0.0 | - |
| Package downloads | 0 | 0.14 | 0.0 | - |
| Developer Q&A activity | 0 | 0.06 | 0.0 | - |
Computed . Re-weight it by intent, or see the full method.
All data & sourcesshow ↓
Every value we hold, with its source, retrieval date, and confidence. This is the evidence behind the score: don't trust it, verify it.