Web Standardı ve RFC Özellikleri

Base64 ve Base64URL — Teknik Farklar ve Standartlar

Standart Base64 ile URL uyumlu Base64URL arasındaki farklar: karakter değişimi, dolgu ve JWT standartları.

Standart Base64 Neden Web URL'lerinde Hata Verir

Standard Base64 (RFC 4648 §4) uses the 64-character alphabet A-Z, a-z, 0-9, +, /, with = used as trailing byte padding.

However, when standard Base64 strings are passed in HTTP query parameters, URI path segments, or web cookies:

  • The plus sign + is automatically interpreted by web servers as a space character (%20), corrupting the payload.
  • The forward slash / is interpreted by web routers as a path delimiter, altering URL routing logic.
  • The equals sign = is used as a key-value parameter separator in query strings.

Alfabe Karakter Değişimleri (RFC 4648 §5)

FeatureStandard Base64Base64URL (URL-Safe)
Index 62+ (plus)- (hyphen)
Index 63/ (slash)_ (underscore)
Padding Character (=)Mandatory (Length % 4 == 0)Omitted or Unpadded

Çevrimiçi Araçları Deneyin

Need to convert between Base64 formats? Use our suite of 100% client-side tools: