Base64URL Encoder & Decoder

Convert text with the URL-safe Base64 alphabet used in tokens and query parameters. Encode or decode locally and choose whether the output includes padding.

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Add your input, adjust the options and run the tool.

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Options
Runs in your browser
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How to use this tool

01

Add your input

Paste text or choose a file. Try the example to get started.

02

Choose your options

Use the URL-safe alphabet for tokens, query parameters and identifiers.

03

Inspect and export

Review the processing notes, then copy or download the result. Continue with another tool if needed.

A practical guide to Base64: bits, padding and validation