Package

is-buffer

Determine if an object is a Buffer

v2.0.5, 3 Nov 2020MITCommonJSTypes: NoneDOM and browser utilities

$ npm install is-buffer

npm GitHub Homepage

Key numbers

As of 25 Sept 2026

Weekly downloads: 41.8m; +19% over 12 months
Gzip bundle size: -; No Bundlephobia data
Dependencies: 0; Direct, from package.json
Last release: 5 years ago; v2.0.5
GitHub stars: 93; 34 forks
Open issues / PRs: 1 / 7
Contributors: 8
Commits, last 52 weeks: 0

Downloads

Last week 2026-09-15 to 2026-09-21

Weekly npm downloads, one point per week, weeks starting 23 Sept 2025 to 15 Sept 2026. The y axis starts at zero.

41,834,068 downloads last week, 175,043,969 in the last month. The 12-month change of +19% compares the average of the last 4 weeks with the first 4 weeks of the series.

Maintenance

Releases, last 12 months: 016 in total
Latest version: 2.0.5, 3 Nov 20205 years ago
First published: 31 Oct 2014
Last push to GitHub: 18 Aug 20211,863 days before the snapshot
Repository archived: No
Open issues: 1
Open pull requests: 7
Commits, last 52 weeks: 0
Dependents on npm: 1,098

Major versions

v2 first release 2.0.0, 29 Jan 2018
v1 first release 1.0.0, 31 Oct 2014

Recent releases

Version	Published
2.0.5	3 Nov 2020
2.0.4	1 Oct 2019
2.0.3	9 Jun 2018
2.0.2	17 Mar 2018
2.0.1	17 Mar 2018
2.0.0	29 Jan 2018
1.1.6	25 Oct 2017
1.1.5	11 Mar 2017
1.1.4	3 Aug 2016
1.1.3	7 Mar 2016
1.1.2	29 Jan 2016
1.1.1	3 Jan 2016
1.1.0	17 Sept 2015
1.0.2	5 May 2015

Compatibility

Module format: CommonJSFrom package.json type, main and exports fields
TypeScript types: None
Node.js engine range: >=4
Runtimes: -
Unpacked size (npm): 4.5 kB
Dependencies (0): None

Install

npm install is-buffer

CDN

jsDelivr: 317.4k requests in 30 days

jsDelivrhttps://cdn.jsdelivr.net/npm/is-buffer@2.0.5/
unpkghttps://unpkg.com/is-buffer@2.0.5/
esm.shhttps://esm.sh/is-buffer@2.0.5

Alternatives

Package	Weekly downloads	Gzip	Last release	Module	Comparison
deep-extend Recursive object extending	33.8m	-	8 years ago	CommonJS	-
re2js RE2JS is the JavaScript port of RE2, a regular expression engine that provides linear time matching	5.1m	-	2 months ago	ESM + CommonJS	-
easy-stack Zero-dependency cooperative LIFO execution for Node.js and browsers	1m	-	1 month ago	ESM + CommonJS	-
level-iterator-stream Turn an abstract-leveldown iterator into a readable stream	564.4k	-	5 years ago	-	-

Sources: npm registry, npm downloads API, GitHub API, jsDelivr. Data fetched 25 Sept 2026.

Indexability: Indexed.