Base64 Encoder/Decoder

Encode and decode Base64 strings

Plain Text

Base64 Output

Your files never leave your device. All processing happens in your browser.

How to Use Base64 Encoder/Decoder

1Enter the text you want to encode, or paste a Base64 string to decode.
2Select 'Encode' or 'Decode' mode.
3The result appears instantly in the output area.
4Copy the encoded or decoded text.

Frequently Asked Questions

What is Base64 encoding?▾

Base64 converts binary data into ASCII text using 64 characters (A-Z, a-z, 0-9, +, /). It's used to embed data in text-based formats like HTML, CSS, and JSON.

Does it handle Unicode and emoji?▾

Yes. The tool uses TextEncoder/TextDecoder to properly handle all Unicode characters including emoji.

When should I use Base64?▾

Embedding images in CSS/HTML (data URIs), encoding binary data in JSON APIs, and email attachment encoding (MIME).

Was this tool helpful?