Base64 Encode / Decode

Encode and decode Base64 side by side.

How Base64 works

Base64 represents binary data using 64 printable ASCII characters (A–Z, a–z, 0–9, + and /). Every 3 bytes become 4 characters, so output is about 33% larger. "=" padding fills the last group.

Text is first converted to UTF-8 bytes, so emoji and non-Latin scripts work. Base64 is an encoding, not encryption — anyone can decode it.

Processed locally in your browser — your input is never uploaded.

What is Base64 Encode / Decode?

Encode and decode Base64 side by side. Base64 represents binary data using 64 printable ASCII characters (A–Z, a–z, 0–9, + and /). Every 3 bytes become 4 characters, so output is about 33% larger. "=" padding fills the last group.

Is Base64 Encode / Decode free to use?

Yes. Base64 Encode / Decode on DevCipher is completely free, with no sign-up, no limits and no ads.

Is my data safe when I use Base64 Encode / Decode?

Yes. Everything runs locally in your browser. Your input is never uploaded to a server, and sensitive values such as keys and tokens are never saved.

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