This feature is well established and works across many devices and browser versions. It’s been available across browsers since April 2021.
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.
text()
None.
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.
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.| Specification |
|---|
| File API> # dom-blob-text> |
| Desktop | Mobile | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Chrome | Edge | Firefox | Opera | Safari | Chrome Android | Firefox for Android | Opera Android | Safari on IOS | Samsung Internet | WebView Android | WebView on iOS | |
text |
76 | 79 | 69 | 63 | 14 | 76 | 79 | 54 | 14.5 | 12.0 | 76 | 14.5 |
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https://developer.mozilla.org/en-US/docs/Web/API/Blob/text