Free, browser-based utilities for everyday developer workflows

Base64 Encoder & Decoder

Convert between plain text (UTF-8) and Base64 in your browser. Useful for API payloads, authorization headers, and debugging integrations.

Use cases

Fix Base64 encoding errors

Explore more in the Use cases library.

  • Encode text to Base64 for API payloads or Authorization headers.
  • Decode Base64/Base64URL back to UTF-8 text.
  • Handy for JWT parts, tokens, and debugging.

Text <-> Base64

Type or paste text on the left and encode it to Base64, or paste Base64 on the right and decode back to text. All processing runs locally in your browser. No uploads.

Runs locally in your browser. No uploads.
Next: URL Encoder Encoding Suite JWT Decoder

How to use Base64 Encoder & Decoder

Paste or type your text into the input field, then click Encode to get a Base64 string or Decode to recover the original text. You can also switch to binary mode to handle file data encoded as Base64.

Common use cases

Developers use this to encode credentials for HTTP Basic Auth headers, decode JWT payload segments, or handle binary-safe data in JSON APIs. DevOps engineers use it to encode secrets for environment variables and Kubernetes configs.

Why run this in your browser?

All processing happens locally in your browser. Your data never leaves your machine, making it safe for sensitive payloads, internal API responses, and confidential configurations.