Base64 URL Encoder Decoder
Encode text to Base64URL or standard Base64, and decode Base64URL strings back to UTF-8 text locally in your browser.
Text is processed locally in your browser and is not uploaded to a server. Do not paste passwords, private keys, or sensitive tokens into pages you do not trust.
About this tool
Encode text to Base64URL or standard Base64, and decode Base64URL strings back to UTF-8 text locally in your browser.
Your text is encoded and decoded locally in your browser and is not uploaded to a server.
Base64 and Base64URL are encoding formats, not encryption. Do not paste passwords, private keys, access tokens, or other sensitive data into pages you do not trust.
How to use it
- Choose encode or decode.
- Select Base64URL or standard Base64.
- Enter text or an encoded string, then copy the result.
Common use cases
- Encode short text for URL-safe values
- Decode Base64URL examples while debugging
- Compare standard Base64 and Base64URL output
Base64URL Versus Standard Base64
Base64URL is a URL-safe variant of Base64. It is useful in web contexts where +, /, or = padding can be inconvenient in URLs or tokens.
| Format | Characters | Common use |
|---|---|---|
| Base64 | +, /, and optional = padding | General binary-to-text encoding |
| Base64URL | - and _ instead of + and / | URL-safe strings and web tokens |
| Neither | No secrecy by itself | Encoding is reversible and not encryption |
FAQ
What is the difference between Base64 and Base64URL?
Base64URL uses URL-safe characters, replacing + and / with - and _, and often omits padding.
Is Base64 encryption?
No. It is reversible encoding and should not be used to protect secrets.
Is my text uploaded?
No. Encoding and decoding run locally in your browser.