Is this Base64 encoder safe to use with sensitive data?

The Base64 encoder and decoder run entirely in your browser using JavaScript. We do not send your input to any server, so it never leaves your device. However, you should still avoid pasting production secrets or credentials into any online tool.

What is Base64 used for?

Base64 is a binary-to-text encoding scheme used to represent bytes as readable ASCII characters. It is commonly used for encoding data in URLs, HTTP headers, JSON APIs, and email attachments.

Why does my decoded string look broken?

If the Base64 input is malformed, truncated, or encoded with a different character set, decoding may fail or produce unexpected characters. Make sure the input is a valid Base64 string without extra spaces or line breaks.

Base64 Encoder / Decoder

Base64 Encoder & Decoder

Quickly convert tokens, credentials, or sample payloads.
No data leaves your browser — safe for test data.
Supports UTF‑8 text and multi-line content.

Paste or type your input below, then use the buttons to process it.

Example: Encode and decode a simple string.

Input:  Hello, DevToolsDesk!
Encoded: SGVsbG8sIERldlRvb2xzRGVzayE=
Decoded: Hello, DevToolsDesk!

A fast, secure Base64 conversion tool — encode or decode text instantly in your browser.

B64 B Base64 Encoder & Decoder

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Base64 Encoder & Decoder