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Proj4js is a JavaScript library to transform point coordinates from one coordinate system to another, including datum transformations.

The latest stable version of proj4 is 2.23.0, published on 2026-11-12. Verified by Vigia on 2026-11-12.

Latest stable version2.23.0
Published2026-11-12 19:40:33 UTC
Installnpm install proj4@latest
Requires (engines)none declared
Peer dependenciesgeotiff *
Dist-tagsalpha: 2.20.1-alpha latest: 2.23.0
LicenseMIT
Advisories on latest versionnone known
Last verified2026-11-12 20:40:13 UTC
Sourcesapi.deps.dev, registry.npmjs.org, registry.npmjs.org

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Maintenance

Activityactive
Last stable release2026-11-12 19:40:33 UTC · 0 days ago
Stable releases in the last 12 months12
Published versions97

Heuristic based only on release dates; it does not measure issue or security response times.

Version history

VersionPublished
2.23.02026-11-12 19:40:33 UTC
2.22.02026-08-31 07:27:26 UTC
2.21.02026-07-27 20:56:50 UTC
2.20.92026-06-08 08:50:05 UTC
2.20.82026-04-06 09:06:11 UTC
2.20.72026-04-06 07:43:23 UTC
2.20.62026-04-02 19:17:30 UTC
2.20.52026-04-02 19:02:40 UTC
2.20.42026-03-06 22:28:49 UTC
2.20.32026-03-01 13:24:43 UTC
2.20.22025-11-18 17:20:36 UTC
2.20.12025-11-17 16:46:15 UTC
2.20.02025-11-12 08:42:40 UTC
2.19.102025-07-27 16:14:42 UTC
2.19.92025-07-26 12:43:34 UTC
2.19.82025-07-24 15:54:24 UTC
2.19.72025-07-15 21:15:06 UTC
2.19.62025-07-12 11:01:14 UTC
2.19.52025-06-29 13:01:44 UTC
2.19.42025-06-26 19:57:47 UTC

Showing the 20 most recent of 83 versions. JSON

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Frequently asked questions

What is the latest version of proj4?

The latest stable version of proj4 is 2.23.0, published on 2026-11-12. Verified by Vigia on 2026-11-12.

How do I install the latest version of proj4?

Run npm install proj4@latest. The latest stable version is 2.23.0 (verified 2026-11-12).

Is proj4 deprecated?

No. proj4 is not marked as deprecated in the registry.

Which Node.js version does proj4 require?

proj4 2.23.0 does not declare a Node.js version requirement.

Does proj4 2.23.0 have known vulnerabilities?

No known advisories affect proj4 2.23.0 according to the data Vigia checks.

Is proj4 still maintained?

proj4 published 12 stable releases in the last 12 months; the most recent was 0 days ago. Activity: active.

Observed changes

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