Blob: text() method

Baseline Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since January 2020.

We’d love to hear your thoughts on the next set of proposals for the JavaScript language. You can find a description of the proposals here.
Please take two minutes to fill out our short survey.

Note: This feature is available in Web Workers.

The text() method of the Blob interface returns a Promise that resolves with a string containing the contents of the blob, interpreted as UTF-8.

Syntax

js
text()

Parameters

None.

Return value

A promise that resolves with a string which contains the blob's data as a text string. The data is always presumed to be in UTF-8 format.

Usage notes

The FileReader method readAsText() is an older method that performs a similar function. It works on both Blob and File objects. There are two key differences:

  • Blob.text() returns a promise, whereas FileReader.readAsText() is an event based API.
  • Blob.text() always uses UTF-8 as encoding, while FileReader.readAsText() can use a different encoding depending on the blob's type and a specified encoding name.

Specifications

Specification
File API
# dom-blob-text

Browser compatibility

See also