Package

is-utf8

Detect if a buffer is utf8 encoded.

v0.2.1, 19 Dec 2015MITCommonJSTypes: None

$ npm install is-utf8

npm GitHub Homepage

Key numbers

As of 25 Sept 2026

Weekly downloads: 7.4m; -6% over 12 months
Gzip bundle size: -; No Bundlephobia data
Dependencies: 0; Direct, from package.json
Last release: 10 years ago; v0.2.1
GitHub stars: -
Open issues / PRs: - / -
Contributors: -
Commits, last 52 weeks: -

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.

7,422,171 downloads last week, 32,221,004 in the last month. The 12-month change of -6% compares the average of the last 4 weeks with the first 4 weeks of the series.

Maintenance

Releases, last 12 months: 03 in total
Latest version: 0.2.1, 19 Dec 201510 years ago
First published: 12 Sept 2012
Last push to GitHub: -
Repository archived: -
Open issues: -
Open pull requests: -
Commits, last 52 weeks: -
Dependents on npm: 581

Major versions

v0 first release 0.1.0, 12 Sept 2012

Recent releases

Version	Published
0.2.1	19 Dec 2015
0.2.0	12 Sept 2012
0.1.0	12 Sept 2012

Compatibility

Module format: CommonJSFrom package.json type, main and exports fields
TypeScript types: None
Node.js engine range: Not declared
Runtimes: -
Unpacked size (npm): -
Dependencies (0): None

Install

npm install is-utf8

CDN

jsDelivrhttps://cdn.jsdelivr.net/npm/is-utf8@0.2.1/
unpkghttps://unpkg.com/is-utf8@0.2.1/
esm.shhttps://esm.sh/is-utf8@0.2.1

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

Indexability: Not indexed (discovery only): GitHub data not fetched yet; no category.