websockets/utf-8-validate

Check if a buffer contains valid UTF-8

JavaScript

125

247 commits

updated Sep 4, 2026

See the code

README

utf-8-validate

Version npm Linux/macOS/Windows Build

Check if a buffer contains valid UTF-8 encoded text.

Installation

npm install utf-8-validate --save-optional

The --save-optional flag tells npm to save the package in your package.json under the optionalDependencies key.

API

The module exports a single function that takes one argument. To maximize performance, the argument is not validated. It is the caller's responsibility to ensure that it is correct.

isValidUTF8(buffer)

Checks whether a buffer contains valid UTF-8.

Arguments

  • buffer - The buffer to check.

Return value

true if the buffer contains only correct UTF-8, else false.

Example

'use strict';

const isValidUTF8 = require('utf-8-validate');

const buf = Buffer.from([0xf0, 0x90, 0x80, 0x80]);

console.log(isValidUTF8(buf));
// => true

License

MIT

utf-8
utf8
validation

Contributors

lpinca

173 commits

3rd-Eden

20 commits

julianduque

1 commits

websockets/utf-8-validate

Check if a buffer contains valid UTF-8

JavaScript

125

247 commits

updated Sep 4, 2026

See the code

README

utf-8-validate

Version npm Linux/macOS/Windows Build

Check if a buffer contains valid UTF-8 encoded text.

Installation

npm install utf-8-validate --save-optional

The --save-optional flag tells npm to save the package in your package.json under the optionalDependencies key.

API

The module exports a single function that takes one argument. To maximize performance, the argument is not validated. It is the caller's responsibility to ensure that it is correct.

isValidUTF8(buffer)

Checks whether a buffer contains valid UTF-8.

Arguments

  • buffer - The buffer to check.

Return value

true if the buffer contains only correct UTF-8, else false.

Example

'use strict';

const isValidUTF8 = require('utf-8-validate');

const buf = Buffer.from([0xf0, 0x90, 0x80, 0x80]);

console.log(isValidUTF8(buf));
// => true

License

MIT

utf-8
utf8
validation

Contributors

lpinca

173 commits

3rd-Eden

20 commits

julianduque

1 commits

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