Base64 Encoder/Decoder
Encode or decode text to and from Base64 format.
How to use
Paste your text and click 'Encode to Base64' to convert it, or paste a Base64 string and click 'Decode from Base64' to get the original text back. The swap button lets you feed the output back in as input for a quick round-trip check.
- Enter your input in the text area provided.
- Adjust any settings or options if available.
- The results will be generated automatically or upon clicking the action button.
- Copy the result to your clipboard using the copy button.
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About Base64 Encoder/Decoder
Base64 Encoder/Decoder converts text to and from Base64, a way of representing binary-safe data as plain ASCII text. It's commonly used for embedding data in places that only accept text — email attachments, data URIs, and API authentication headers, among others.
Common Use Cases
- Decoding a Base64-encoded JWT payload or API auth header to inspect its contents.
- Preparing a small data URI for embedding directly in HTML or CSS.
- Checking what a Base64 string in a config file or log actually contains.
- Verifying that data survived an encode/decode round-trip unchanged.
Common Mistakes
Base64 is an encoding, not encryption — anyone can decode it, so it shouldn't be used to hide sensitive data.
This tool uses the browser's built-in encoder, which only handles Latin1 text directly; pasting emoji or non-Latin characters (like Chinese, Arabic, or Cyrillic text) will throw an encoding error rather than producing output.
Frequently Asked Questions
Is Base64 the same as encryption?
No. Base64 just re-represents data as text — it provides no confidentiality. Anyone can decode a Base64 string back to its original form instantly.