Base64 Encoder & Decoder
Encode any text to Base64 or decode Base64 strings back to plain text instantly — for basic-auth headers, JWTs, data URIs, and API payloads.
Free, no signup — full Unicode and UTF-8 support, and everything runs securely in your browser.
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How to Encode & Decode Base64
Convert between text and Base64 in three quick steps.
Choose Encode or Decode
Pick the Encode tab to turn text into Base64, or the Decode tab to turn Base64 back into readable text.
Paste Your Input
Drop in plain text, JSON, credentials, or a Base64 string. UTF-8 and special characters are fully supported.
Copy or Download
Get the result instantly, then copy it to your clipboard or download it as a file.
// text
Hello, Cubix! 👋
// base64
SGVsbG8sIEN1Yml4ISDwn5GL
Two-Way Conversion
Encode text to Base64 or decode Base64 strings back to the original text with a single click.
Unicode Support
Handles all UTF-8 characters including emoji, accented letters, and international scripts.
Copy & Download
Copy the result to your clipboard or download it as a file in one click.
Frequently Asked Questions
What is Base64 encoding?
Base64 is a method of encoding binary data as ASCII text, commonly used to embed data in HTML, CSS, JSON, JWTs, and basic-auth headers, or to safely transfer data over text-based protocols.
Can I decode Base64 back to text?
Yes. Switch to the Decode tab, paste your Base64 string, and click Decode to get the original text back. The tool handles standard and common URL-safe Base64 input.
Does it support Unicode and special characters?
Yes. The encoder uses UTF-8, so it correctly handles all Unicode characters including emoji, accented letters, and non-Latin scripts.
Is my data private?
Yes. Encoding and decoding happen in your browser — nothing is uploaded or stored, which is important when encoding credentials or tokens.
Is this free to use?
Yes. The Base64 Encoder & Decoder is completely free with no signup, no login, and no limits.
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