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NMSnabbit.

Base64 Encoder & Decoder

Encode text to Base64 or decode Base64 back to text — UTF-8 safe.

Encoders & Decoders Runs in your browser

What is Base64 encoding?

Base64 encoding represents text or binary data using 64 printable ASCII characters, and is widely used in data URIs, JSON, JWTs and email. NMSnabbit encodes text to Base64 and decodes it back with full UTF-8 support, so emoji and accents round-trip correctly. Everything runs in your browser — your data is never uploaded.

How to use the Base64 Encode / Decode

  1. 1 Paste your text or Base64 string.
  2. 2 Choose Encode (text → Base64) or Decode (Base64 → text).
  3. 3 The converted output appears instantly.
  4. 4 Copy the result.

What you can use it for

  • Embedding images or files as data URIs.
  • Encoding tokens or credentials for testing.
  • Decoding Base64 found in JSON, JWTs or emails.
  • Transporting text safely through ASCII-only systems.

Frequently asked questions

What is Base64 encoding?
Base64 represents binary or text data using 64 printable ASCII characters. It is widely used to embed data in URLs, JSON, email and data URIs.
Does it support emoji and accents?
Yes. Text is encoded as UTF-8 first, so emoji and accented characters round-trip correctly through both encode and decode.
Why does decoding fail sometimes?
Decoding fails if the input is not valid Base64. Remove any stray characters; the tool ignores normal line breaks automatically.
Is my data private?
Yes. Encoding and decoding run locally in your browser, so your data is never sent to a server.

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