Base64 Encoder

Base64 Encoder

The Base64 Encoder converts text and files to Base64 and back. Base64 represents binary data using 64 printable ASCII characters, which is why it is used for data URLs, email attachments, JWT segments and embedding assets — anywhere binary must travel through text-only channels.

Why use Base64 Encoder

  • Encode text to Base64 and decode Base64 to text, UTF-8 safe.
  • Auto-detect mode figures out which direction you need.
  • Upload any file to get its Base64 or a ready-to-use data URL.
  • Live character and byte counts for input and output.

How to use Base64 Encoder

  1. 1Choose a mode. Pick Encode, Decode, or leave it on Auto to detect automatically.
  2. 2Enter text or a file. Type or paste text, or upload a file to encode it to Base64.
  3. 3Copy the result. Copy the output, or copy it as a data URL for embedding.

Frequently asked questions

Is Base64 encryption?
No. Base64 is an encoding, not encryption — it is fully reversible and provides no security. Use it for transport, not secrecy.
Does this handle Unicode and files?
Yes. Encoding is UTF-8 safe, and you can upload any file to get its Base64 (e.g. data URLs for images).
Is my data uploaded?
No. Encoding and decoding run entirely in your browser; nothing leaves your device.

Developer notes

Base64 is an encoding, not encryption — it offers no confidentiality and grows data by ~33%. Use it for transport and embedding, never to protect secrets.

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