Base64URL
URL-safe Base64 (RFC 4648 §5) — used by JWTs and URL-embedded tokens. Uses "-"/"_" instead of "+"/"/" and omits padding.
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How to Use the Base64URL
URL-safe Base64 (RFC 4648 §5) — used by JWTs and URL-embedded tokens. Uses "-"/"_" instead of "+"/"/" and omits padding. The output updates as you type, and your input never leaves this browser tab.
- 01
Choose Encode or Decode
Use the switch at the top of the tool. Pick Encode for plain text, or Decode if you already have an encoded value.
- 02
Paste Your Input
Paste or type into the input box. If the input is not valid for decoding, the tool tells you instead of showing broken output.
- 03
Copy the Result
Copy the result to your clipboard with one click. You don't need an account.
Frequently Asked Questions
Answers about this tool.
Is my data uploaded anywhere when I use the Base64URL?
No. The Base64URL runs inside your browser, so nothing you type or paste is sent to a server.
Is this tool free?
Yes. Every tool in Encoding Studio is free, with no usage limit and no sign-up.
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Base64, URL, HTML entities, Unicode, hex, binary, ASCII, and JSON string escaping. Pick a format and the result appears as you type, worked out in your browser.
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