# opentype.js

- **Canonical URI:** https://www.vioscale.ai/software/opentype-js
- **Category:** Font Tools
- **Homepage:** https://opentype.js.org
- **Also known as:** opentype-js
- **Profile claimed by vendor:** no
- **Last updated:** 2026-08-26T19:31:11.463Z

## Vioscale score

**43.2 / 100**, confidence 21% (low). Computed 2026-09-01.

Composite of weighted, independently-sourced signals (no user reviews, no vendor payment).

| Signal | Score | Weight | Contribution | Evidence present |
|---|--:|--:|--:|:--:|
| capabilities | 0 | 0.07844444444444446 | 0 | - |
| repo_stars | 69.8 | 0.026 | 1.8 | ✓ |
| integrations | 0 | 0.07033333333333334 | 0 | - |
| dependent_projects | 67.8 | 0.063 | 4.3 | ✓ |
| dev_activity | 0 | 0.094 | 0 | ✓ |
| release_cadence | 80 | 0.052 | 4.2 | ✓ |
| security_posture | 0 | 0.073 | 0 | - |
| package_downloads | 0 | 0.136 | 0 | - |
| security_score | 41 | 0.042 | 1.7 | ✓ |
| community_qa_activity | 0 | 0.063 | 0 | - |

## About

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.

_Independently observed._

## Platform & deployment

- **Platforms:** CLI, Web

## Release history

| Version | Date | Type |
|---|---|---|
| [2.0.0](https://github.com/opentypejs/opentype.js/releases/tag/2.0.0) | 2026-05-06 | stable |
| [1.3.5](https://github.com/opentypejs/opentype.js/releases/tag/1.3.5) | 2026-04-29 | stable |
| [1.3.4](https://github.com/opentypejs/opentype.js/releases/tag/1.3.4) | 2023-11-13 | stable |
| [1.3.1](https://github.com/opentypejs/opentype.js/releases/tag/1.3.1) | 2020-04-13 | stable |
| [1.3.0](https://github.com/opentypejs/opentype.js/releases/tag/1.3.0) | 2020-04-13 | stable |
| [1.2.1](https://github.com/opentypejs/opentype.js/releases/tag/1.2.1) | 2020-04-13 | stable |
| [1.2.0](https://github.com/opentypejs/opentype.js/releases/tag/1.2.0) | 2020-04-13 | stable |
| [0.11.0](https://github.com/opentypejs/opentype.js/releases/tag/0.11.0) | 2018-10-22 | stable |
| [0.10.0](https://github.com/opentypejs/opentype.js/releases/tag/0.10.0) | 2018-08-17 | stable |

## Security & compliance


Known vulnerabilities: 0 (0 in the last 12 months) ([source](https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=npm&package_name=opentype.js&per_page=100)). A count reflects scale and disclosure, not quality.

## Facts

Every value below carries its source and our confidence. Facts are re-crawled on a freshness schedule.

### adoption

| Attribute | Value | Source | Retrieved | Confidence |
|---|---|---|---|---|
| adoption.github_stars | 5,012 | [link](https://github.com/opentypejs/opentype.js) | 2026-08-26 | 90% (high) |
| adoption.dependent_repos | 11,718 | [link](https://packages.ecosyste.ms/api/v1/packages/lookup?repository_url=https%3A%2F%2Fgithub.com%2Fopentypejs%2Fopentype.js) | 2026-08-26 | 85% (high) |

### language

| Attribute | Value | Source | Retrieved | Confidence |
|---|---|---|---|---|
| language.primary | JavaScript | [link](https://github.com/opentypejs/opentype.js) | 2026-08-26 | 90% (high) |

### license

| Attribute | Value | Source | Retrieved | Confidence |
|---|---|---|---|---|
| license.spdx | MIT | [link](https://github.com/opentypejs/opentype.js) | 2026-08-26 | 95% (high) |

### release

| Attribute | Value | Source | Retrieved | Confidence |
|---|---|---|---|---|
| release.cadence_days | 36 | [link](https://github.com/opentypejs/opentype.js/releases) | 2026-08-26 | 70% (medium) |

### activity

| Attribute | Value | Source | Retrieved | Confidence |
|---|---|---|---|---|
| activity.commits_last_30d | 0 | [link](https://github.com/opentypejs/opentype.js/pulse) | 2026-08-26 | 65% (medium) |

### security

| Attribute | Value | Source | Retrieved | Confidence |
|---|---|---|---|---|
| security.scorecard | 4.1 | [link](https://api.securityscorecards.dev/projects/github.com/opentypejs/opentype.js) | 2026-08-26 | 90% (high) |
| security.vulnerabilities | `{"count":0,"source":"https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=npm&package_name=opentype.js&per_page=100","last_12m":0,"max_severity":null}` | [link](https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=npm&package_name=opentype.js&per_page=100) | 2026-08-26 | 90% (high) |

---
*Source: Vioscale (https://www.vioscale.ai/software/opentype-js). Independent, evidence-based software intelligence. Cite the canonical URI.*