npm · npm:asn1js

asn1js active

asn1js is a pure JavaScript library implementing this standard. ASN.1 is the basis of all X.509 related data structures and numerous other protocols used on the web

The latest stable version of asn1js is 4.0.0, published on 2026-10-19. Verified by Vigia on 2026-11-12.

Latest stable version	4.0.0
Published	2026-10-19 14:54:40 UTC
Install	`npm install asn1js@latest`
Requires (engines)	`{"node":"^20.19.0 \|\| >=22.12.0"}`
Peer dependencies	—
Dist-tags	`latest: 4.0.0`
License	BSD-3-Clause
Advisories on latest version	none known
Last verified	2026-11-12 18:42:19 UTC
Sources	api.deps.dev, registry.npmjs.org, registry.npmjs.org

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Maintenance

Activity	active
Last stable release	2026-10-19 14:54:40 UTC · 24 days ago
Stable releases in the last 12 months	5
Published versions	45

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

Version history

Version	Published
`4.0.0`	2026-10-19 14:54:40 UTC
`3.1.0`	2026-10-16 14:36:32 UTC
`3.0.10`	2026-04-20 15:15:24 UTC
`3.0.9`	2026-04-20 12:02:23 UTC
`3.0.7`	2025-12-09 16:32:01 UTC
`3.0.6`	2025-03-28 13:44:21 UTC
`3.0.5`	2022-05-20 12:35:10 UTC
`3.0.4`	2022-05-19 13:07:23 UTC
`3.0.3`	2022-05-16 19:04:10 UTC
`3.0.2`	2022-05-12 21:37:40 UTC
`3.0.1`	2022-05-12 11:19:39 UTC
`3.0.0`	2022-05-12 08:24:17 UTC
`2.4.0`	2022-04-26 07:20:10 UTC
`2.3.3`	2022-04-25 12:59:34 UTC
`2.3.2`	2022-03-20 12:54:23 UTC
`2.3.1`	2022-03-18 09:16:22 UTC
`2.3.0`	2022-03-18 09:04:30 UTC
`2.2.0`	2021-12-23 11:10:18 UTC
`2.1.1`	2021-03-22 12:38:15 UTC
`2.1.0`	2021-03-17 07:41:28 UTC

Showing the 20 most recent of 45 versions. JSON

Version compatibility

Newest stable version that declares support for each runtime version (from the requirements published with each version).

Runtime	Newest compatible version
`node 16`	`3.1.0`
`node 18`	`3.1.0`
`node 20`	`4.0.0`
`node 22`	`4.0.0`
`node 24`	`4.0.0`

Upgrade guides for this package

3.x → 4.x

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Frequently asked questions

What is the latest version of asn1js?

The latest stable version of asn1js is 4.0.0, published on 2026-10-19. Verified by Vigia on 2026-11-12.

How do I install the latest version of asn1js?

Run npm install asn1js@latest. The latest stable version is 4.0.0 (verified 2026-11-12).

Is asn1js deprecated?

No. asn1js is not marked as deprecated in the registry.

Which Node.js version does asn1js require?

asn1js 4.0.0 declares this requirement: {"node":"^20.19.0 || >=22.12.0"}.

Does asn1js 4.0.0 have known vulnerabilities?

No known advisories affect asn1js 4.0.0 according to the data Vigia checks.

Is asn1js still maintained?

asn1js published 5 stable releases in the last 12 months; the most recent was 24 days ago. Activity: active.

Observed changes

Mon Oct 19 2026 16:12:20 GM +0000 (Coordinated Universal Time) — runtime_requirement_changed
Mon Oct 19 2026 16:12:20 GM +0000 (Coordinated Universal Time) — released 3.1.0 → 4.0.0
Sat Oct 17 2026 12:06:42 GM +0000 (Coordinated Universal Time) — released 3.1.0 → 3.1.0
Fri Oct 16 2026 16:06:01 GM +0000 (Coordinated Universal Time) — released 3.0.10 → 3.1.0

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