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Base64 Encoder & Decoder

Encode plain text to Base64 or decode Base64 back to readable text.

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About this tool

Base64 helps developers, API testers, support engineers, and integration teams encode text to Base64 or decode Base64 back to readable text. Use it for Authorization headers, JWT segment inspection, webhook payloads, data URI snippets, email-safe text, and binary-to-text debugging.

Use cases

  • Encode a username:password test credential while checking a Basic Authorization header in docs, curl examples, or a sandbox request.
  • Decode a Base64 payload from a webhook, log line, JWT segment, or support ticket to confirm what text was actually sent.
  • Check whether padding characters, line breaks, spaces, or URL-safe variants are causing an integration to reject a Base64 value.
  • Convert small text fixtures for emails, APIs, or config examples without installing a command-line encoder.

FAQ

What is Base64 best used for?

Base64 is best used to encode text into a binary-to-text representation or decode Base64 text back into readable content for API, header, webhook, and documentation workflows.

What input and output should I expect?

Paste plain text to encode or Base64 text to decode. The tool returns the transformed value so you can copy it into requests, examples, tickets, or notes.

Is Base64 encryption or hashing?

No. Base64 is reversible encoding. Do not use it to hide secrets, passwords, tokens, or personal data from anyone who can read the value.

What edge cases affect Base64?

Missing padding, URL-safe alphabets, whitespace, non-UTF-8 bytes, and very large binary files can change decoding behavior. This browser workflow is best for text-sized payloads and quick checks.