Base64 Converter

Encode and decode text data securely. UTF-8 supported.

How to use this Base64 Tool

  • Encode: Converts plain text into a Base64 string. Useful for embedding data or basic obfuscation.
  • Decode: Converts a Base64 string back to readable text.
  • URL Safe Mode: Replaces + with - and / with _. It also removes the padding = characters. This is essential for passing Base64 data in URLs.
  • UTF-8 Support: Full support for Chinese characters, Emojis, and special symbols.

Frequently asked questions

Is Base64 encryption?

No. Base64 is an encoding, not encryption — it simply represents binary data as ASCII text and can be decoded by anyone. Never use it to protect passwords or secrets; use it to safely transport data through text-only channels like JSON, email or data URIs.

Does this handle Unicode and emoji correctly?

Yes. The converter uses UTF-8 under the hood, so accented characters, non-Latin scripts and emoji round-trip correctly — unlike the naive btoa()/atob() calls that break on any character above code point 255.

What is Base64URL and how is it different?

Base64URL is a URL-safe variant that replaces '+' and '/' with '-' and '_' and usually drops the '=' padding, so the result can be used in URLs and JWTs without escaping. Standard Base64 keeps the original alphabet.

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