Base64 Encoder & Decoder

What the Base64 Encoder & Decoder does

This tool converts plain text to Base64 encoding, or decodes Base64 back into readable text, entirely in your browser — useful any time you need to represent binary-safe text data, like embedding small files or credentials in a text-based format.

How to use it

1. Paste your text or Base64 string into the box.
2. Click Encode to Base64 or Decode from Base64 depending on direction.
3. Click Copy result to copy the output.

Common uses

• Decoding a Base64-encoded API token, header value, or config string to inspect its contents.
• Encoding a short string for embedding in a URL, data attribute, or config file.
• Debugging a Base64 payload in a JWT or webhook to see what's inside it.
• Preparing binary-safe text data for systems that don't handle raw binary well.
• Verifying that an encode/decode round-trip in your own code produces the expected result.

Good to know

Base64 is an encoding scheme, not encryption — anyone can decode it instantly, so it should never be relied on to protect sensitive data like passwords, only to represent binary data in text-safe form. Decoding will fail or produce garbage if the input isn't valid Base64 (wrong length, invalid characters), which is usually a sign the string was truncated or copied incorrectly.

Base64 encoding exists because certain systems and protocols were originally built to handle only plain text safely, not raw binary data — email systems being a classic example, which is why attachments are Base64-encoded behind the scenes. That legacy is why Base64 still shows up constantly in modern contexts like embedding images in CSS, encoding tokens in web APIs, and representing binary data inside JSON, even though the original text-only constraints that created the need for it are largely gone.