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JS
Package

is-json

Check if a value is a valid JSON object/array string (or a plain object), without try/catch on the caller side.

v3.0.1, 27 May 2026ISC-Types: -TypeScript tooling
$ npm install is-json
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Key numbers

As of 25 Sept 2026
Weekly downloads
1.4m
+251% over 12 months
Gzip bundle size
-
No Bundlephobia data
Dependencies
0
Direct, from package.json
Last release
3 months ago
v3.0.1
GitHub stars
-
Open issues / PRs
- / -
Contributors
-
Commits, last 52 weeks
-

Downloads

Last week 2026-09-15 to 2026-09-21
0500k1m1.5m2mSept 2025Mar 2026Sept 2026High 1.9m (25 Aug 2026)Low 239k (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.

1,379,014 downloads last week, 6,448,536 in the last month. The 12-month change of +251% compares the average of the last 4 weeks with the first 4 weeks of the series.

Maintenance

Releases, last 12 months
212 in total
Latest version
3.0.1, 27 May 20263 months ago
First published
21 Apr 2014
Last push to GitHub
-
Repository archived
-
Open issues
-
Open pull requests
-
Commits, last 52 weeks
-
Dependents on npm
172

Major versions

  1. v3 first release 3.0.0, 26 May 2026
  2. v2 first release 2.0.0, 3 Mar 2016
  3. v1 first release 1.0.0, 21 Apr 2014

Recent releases

VersionPublished
3.0.127 May 2026
3.0.026 May 2026
2.0.117 Sept 2016
2.0.03 Mar 2016
1.2.52 Jul 2014
1.1.52 Jul 2014
1.1.42 Jul 2014
1.1.325 May 2014
1.1.220 May 2014
1.1.122 Apr 2014
1.0.121 Apr 2014
1.0.021 Apr 2014

Compatibility

Module format
-Not determined from package.json
TypeScript types
-
Node.js engine range
Not declared
Runtimes
-
Unpacked size (npm)
-
Dependencies (0)
None

Install

npm install is-json

CDN

  • jsDelivrhttps://cdn.jsdelivr.net/npm/is-json@3.0.1/
  • unpkghttps://unpkg.com/is-json@3.0.1/
  • esm.shhttps://esm.sh/is-json@3.0.1
Sources: npm registry, npm downloads API. Data fetched 25 Sept 2026.

Indexability: Not indexed (discovery only): GitHub data not fetched yet.