Base64 Encoder

Encode text to Base64 in your browser. Supports full UTF-8. Nothing uploaded.

100% in your browser — files never uploaded.
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How to use the Base64 Encoder

  1. 1
    Paste input
    Type or paste — the conversion runs as you type.
  2. 2
    Read output
    Updates live, with errors flagged if input is invalid.
  3. 3
    Copy
    Click Copy or select the output to copy.

About this tool

Base64 encodes binary or text data using 64 printable ASCII characters (A-Z, a-z, 0-9, +, /) so it can travel through systems that only handle text — emails, URLs, JSON, data: URIs.

This encoder uses UTF-8 for non-ASCII input, so emoji and non-Latin scripts round-trip safely. Standard Base64 alphabet — no URL-safe variant.

Frequently asked questions

UTF-8?
Yes — non-ASCII text is encoded as UTF-8 bytes first, then Base64.
Is it uploaded?
No, encoding runs in your browser.
URL-safe?
This tool outputs standard Base64. For URL-safe, replace + with - and / with _.
Mobile?
Yes.

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