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Base64 encoding and decoding

Atob-btoa provides a JavaScript API for encoding and decoding strings to and from Base64: atob and btoa.

Last updated on : 2023-03-20

Browser Versions

Edge

Firefox

Chrome

Safari

Opera

5.5 - 9

10 - 11

12 - 111

2 - 113

4 - 114

3.2 - 16.4

9.5 - 10

10.6 - 95

Fully Supported

Partially

No Support

Specifications

HTML Standard # dom-atob-dev

Syntax

var decodedData = atob(encodedData);

Browser Compatibility

Base64 encoding and decoding on IE is fully supported on 10-11, and not supported on 5.5-9 IE versions.

Base64 encoding and decoding on Edge is fully supported on all Edge versions.

Base64 encoding and decoding on Firefox is fully supported on all Firefox versions.

Base64 encoding and decoding on Chrome is fully supported on all Chrome versions.

Base64 encoding and decoding on Safari is fully supported on all Safari versions.

Base64 encoding and decoding on Opera is fully supported on 10.6-95, and not supported on 9.5-10 Opera versions.

Base64 encoding and decoding on Safari on iOS is fully supported on all Safari on iOS versions.

Base64 encoding and decoding on Android Browser is fully supported on all Android Browser versions.

Base64 encoding and decoding on Opera Mobile is fully supported on all Opera Mobile versions.

Base64 encoding and decoding on Chrome for Android is fully supported on all Chrome for Android versions.

Base64 encoding and decoding on Firefox for Android is fully supported on all Firefox for Android versions.

Base64 encoding and decoding on Samsung Internet is fully supported on all Samsung Internet versions.

Browser Support for Base64 encoding and decoding

Base64 encoding and decoding on Chrome

Base64 encoding and decoding on Safari

Base64 encoding and decoding on Firefox

Base64 encoding and decoding on Internet Explorer

Base64 encoding and decoding on Opera

Base64 encoding and decoding on Edge

References

Data sourced from

High

Overall Browser Compatibility Score

Note:Base64 encoding and decoding shows a browser compatibility score of 97. This is a collective score out of 100 to represent browser support of a web technology. The higher this score is, the greater is the browser compatibility. The browser compatibility score is not a 100% reflection for every browser and the web technology support. However, it does give you an estimate on how much you should rely on a particular web technology in terms of browser compatibility.

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