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Base64 Encode / Decode

Encode plain text to Base64 or decode Base64 back to readable text with Unicode support.

Base64 Encode and Decode is useful for inspecting encoded headers, quick text transport, and debugging payload fragments without leaving the browser.

What is Base64 Encode / Decode?

Base64 Encode and Decode is useful for inspecting encoded headers, quick text transport, and debugging payload fragments without leaving the browser.

Use it to inspect or create Base64 text found in API payloads, basic-auth values, data URIs, fixtures and Logs.

How to use Base64 Encode / Decode?

Step 1

Try the included example input, then replace it with a redacted sample from the system you are debugging.

Step 2

Paste text or Base64 into the input panel.

Step 3

Choose encode or decode depending on your direction.

Step 4

Copy the output once the conversion looks right.

Example input / output

Decode a Base64 field, determine whether it contains UTF-8 text, JSON or binary data, then move structured output into the relevant Formatter or Validator.

Review the result for completeness before copying it into code, a test, a ticket or another tool.

Example input

developer-debug-tools

Example output

The tool returns a readable, copy-ready result based on the selected action.

Practical developer examples

Inspect an encoded Payload

Decode a field copied from an API response and check whether the result is JSON, plain text or a binary file signature.

Diagnose encoding damage

Check missing padding, Base64URL characters and text encoding before assuming the source value is corrupted.

Common developer use cases

Base64 is an encoding, not encryption. Decoded content may still contain secrets or binary bytes, and Base64URL values use a related but different alphabet.

Common issues

Whitespace and invalid characters can break decoding.
Binary Base64 is best handled with the dedicated PDF workflow when the payload is a document.

FAQ

Does Base64 Encode / Decode send data to a server?

The interactive transformation is handled in the browser in this frontend build. Analytics and advertising scripts may still load separately for site measurement or ads readiness, so avoid pasting active secrets or regulated personal data.

What input works best in base64 encode / decode?

Paste raw plain text or Base64 text directly into the input area or use the example button for a quick starting point.

Can I share Base64 Encode / Decode output with teammates?

Yes, but review the result first and redact tokens, private keys, customer data, internal URLs, account IDs, and other sensitive values before sending it in a ticket, chat, or pull request.