Validateur de Chaînes Base64 en Ligne
Vérifiez la validité et la syntaxe des chaînes Base64 et Base64URL.
Foire Aux Questions (FAQ)
What makes a Base64 string valid?
A valid Base64 string consists only of allowed alphabet characters (A-Z, a-z, 0-9, +, / or -, _ for URL-Safe), has a length divisible by 4 (or valid unpadded length), and uses correct '=' or '==' trailing padding.
Why does a valid Base64 string fail to produce readable text?
Base64 can encode any binary data, including images, encrypted bytes, or compiled code. Decoding binary data yields non-printable or scrambled characters unless interpreted in its native binary format or correct character encoding.
How does character set affect Base64 validation?
Validation checks string structure and character sets. Standard Base64 uses '+' and '/', while URL-Safe Base64 uses '-' and '_'. Selecting the proper character encoding (UTF-8, ASCII, or Hex) ensures accurate validation.
What is padding in Base64 validation?
Padding uses '=' or '==' characters at the end of a Base64 string to ensure the total string length is a multiple of 4 when the input byte count is not a multiple of 3. Correct padding alignment is essential for standard Base64 validation.