Base64URL Decode
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Converted locally in your browser with UTF-8 safe TextEncoder and TextDecoder handling. Your text stays only on this page.
Decode Base64URL text
Convert URL-safe Base64URL back into readable text using browser APIs. Input is accepted with or without = padding, the - and _ characters are mapped back to + and /, and decoded bytes are interpreted as UTF-8 so Unicode text round-trips correctly.
When to use this tool
Use Base64URL when an encoded value has to travel inside a URL, query parameter, or token. JWTs, OAuth/OIDC parameters, and other URL-safe tokens use this variant, which swaps + and / for - and _ and omits trailing = padding.
Privacy and limitations
This conversion runs locally in your browser. Base64URL is an encoding format, not encryption, so anyone can decode the result if they have the encoded text.