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asn1js

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

v3.0.10, 20 Apr 2026BSD-3-ClauseESM + CommonJSTypes: Bundled
$ npm install asn1js

Key numbers

As of 25 Sept 2026
Weekly downloads
13.9m
+308% over 12 months
Gzip bundle size
-
No Bundlephobia data
Dependencies
3
Direct, from package.json
Last release
5 months ago
v3.0.10
GitHub stars
300
66 forks
Open issues / PRs
21 / 3
Contributors
-
Commits, last 52 weeks
97

Downloads

Last week 2026-09-15 to 2026-09-21
05m10m15m20mSept 2025Mar 2026Sept 2026High 18m (25 Aug 2026)Low 1.9m (23 Dec 2025)
Weekly npm downloads, one point per week, weeks starting 23 Sept 2025 to 15 Sept 2026. The y axis starts at zero.

13,943,630 downloads last week, 60,610,990 in the last month. The 12-month change of +308% compares the average of the last 4 weeks with the first 4 weeks of the series.

Releases, last 12 months
343 in total
Latest version
3.0.10, 20 Apr 20265 months ago
First published
16 Jul 2014
Last push to GitHub
24 Sept 2026same day as the snapshot
Repository archived
No
Open issues
21
Open pull requests
3
Commits, last 52 weeks
97
Dependents on npm
365

Major versions

  1. v3 first release 3.0.0, 12 May 2022
  2. v2 first release 2.0.10, 6 Jan 2017
  3. v1 first release 1.0.1, 16 Jul 2014

Recent releases

VersionPublished
3.0.1020 Apr 2026
3.0.920 Apr 2026
3.0.79 Dec 2025
3.0.628 Mar 2025
3.0.520 May 2022
3.0.419 May 2022
3.0.316 May 2022
3.0.212 May 2022
3.0.112 May 2022
3.0.012 May 2022
2.4.026 Apr 2022
2.3.325 Apr 2022
2.3.220 Mar 2022
2.3.118 Mar 2022
Module format
ESM + CommonJSFrom package.json type, main and exports fields
TypeScript types
Bundled
Node.js engine range
>=12.0.0
Runtimes
-
Unpacked size (npm)
282 kB
Dependencies (3)
tslibpvutilspvtsutils
npm install asn1js
  • jsDelivrhttps://cdn.jsdelivr.net/npm/asn1js@3.0.10/
  • unpkghttps://unpkg.com/asn1js@3.0.10/
  • esm.shhttps://esm.sh/asn1js@3.0.10
Sources: npm registry, npm downloads API, GitHub API. Data fetched 25 Sept 2026.

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