Base64 (English Wikipedia)

"Shell Arithmetic". Bash Reference Manual. Retrieved 8 April 2020. Otherwise, numbers take the form [base#]n, where the optional base is a decimal number between 2 and 64 representing the arithmetic base, and n is a number in that base.

html5.org (Global: low place; English: low place)

"7.3. Base64 utility methods". HTML 5.2 Editor's Draft. World Wide Web Consortium. Retrieved 2 January 2018. Introduced by changeset 5814 Archived 2014-02-22 at the Wayback Machine, 2021-02-01.

iacr.org (Global: 5,032^nd place; English: 3,357^th place)

eprint.iacr.org

Chalkias, Konstantinos; Chatzigiannis, Panagiotis (30 May 2022). Base64 Malleability in Practice (PDF). ASIA CCS '22: 2022 ACM on Asia Conference on Computer and Communications Security. pp. 1219–1221. doi:10.1145/3488932.3527284.

ietf.org (Global: 214^th place; English: 176^th place)

datatracker.ietf.org

Privacy Enhancement for InternetElectronic Mail: Part I: Message Encryption and Authentication Procedures. IETF. February 1993. doi:10.17487/RFC1421. RFC 1421. Retrieved March 18, 2010.
Multipurpose Internet Mail Extensions: (MIME) Part One: Format of Internet Message Bodies. IETF. November 1996. doi:10.17487/RFC2045. RFC 2045. Retrieved March 18, 2010.
The Base16, Base32, and Base64 Data Encodings. IETF. July 2003. doi:10.17487/RFC3548. RFC 3548. Retrieved March 18, 2010.
The Base16, Base32, and Base64 Data Encodings. IETF. October 2006. doi:10.17487/RFC4648. RFC 4648. Retrieved March 18, 2010.
Privacy Enhancement for Internet Electronic Mail. IETF. February 1987. doi:10.17487/RFC0989. RFC 989. Retrieved March 18, 2010.
UTF-7 A Mail-Safe Transformation Format of Unicode. IETF. July 1994. doi:10.17487/RFC1642. RFC 1642. Retrieved March 18, 2010.
UTF-7 A Mail-Safe Transformation Format of Unicode. IETF. May 1997. doi:10.17487/RFC2152. RFC 2152. Retrieved March 18, 2010.
OpenPGP Message Format. IETF. July 2024. doi:10.17487/RFC9580. RFC 9580. Retrieved February 13, 2025.

jsfiddle.net (Global: low place; English: low place)

"Edit fiddle". jsfiddle.net.

mentalfloss.com (Global: 1,139^th place; English: 709^th place)

"Here's Why YouTube Will Practically Never Run Out of Unique Video IDs". www.mentalfloss.com. 23 March 2016. Retrieved 27 December 2021.

mozilla.org (Global: 1,686^th place; English: 1,293^rd place)

developer.mozilla.org

"Base64 encoding and decoding – Web APIs". MDN Web Docs. Archived from the original on 2014-11-11.
"Window: btoa() method". 24 June 2025. Retrieved 2025-07-31.

openbsd.org (Global: low place; English: 6,737^th place)

cvsweb.openbsd.org

Provos, Niels (1997-02-13). "src/lib/libc/crypt/bcrypt.c r1.1". Retrieved 2018-05-18.

rfc-editor.org (Global: 6,184^th place; English: 4,465^th place)

Privacy Enhancement for InternetElectronic Mail: Part I: Message Encryption and Authentication Procedures. IETF. February 1993. doi:10.17487/RFC1421. RFC 1421. Retrieved March 18, 2010.
Multipurpose Internet Mail Extensions: (MIME) Part One: Format of Internet Message Bodies. IETF. November 1996. doi:10.17487/RFC2045. RFC 2045. Retrieved March 18, 2010.
The Base16, Base32, and Base64 Data Encodings. IETF. July 2003. doi:10.17487/RFC3548. RFC 3548. Retrieved March 18, 2010.
The Base16, Base32, and Base64 Data Encodings. IETF. October 2006. doi:10.17487/RFC4648. RFC 4648. Retrieved March 18, 2010.
Privacy Enhancement for Internet Electronic Mail. IETF. February 1987. doi:10.17487/RFC0989. RFC 989. Retrieved March 18, 2010.
UTF-7 A Mail-Safe Transformation Format of Unicode. IETF. July 1994. doi:10.17487/RFC1642. RFC 1642. Retrieved March 18, 2010.
UTF-7 A Mail-Safe Transformation Format of Unicode. IETF. May 1997. doi:10.17487/RFC2152. RFC 2152. Retrieved March 18, 2010.
OpenPGP Message Format. IETF. July 2024. doi:10.17487/RFC9580. RFC 9580. Retrieved February 13, 2025.

w3c.github.io (Global: low place; English: low place)

"7.3. Base64 utility methods". HTML 5.2 Editor's Draft. World Wide Web Consortium. Retrieved 2 January 2018. Introduced by changeset 5814 Archived 2014-02-22 at the Wayback Machine, 2021-02-01.

web.archive.org (Global: 1^st place; English: 1^st place)

"Base64 encoding and decoding – Web APIs". MDN Web Docs. Archived from the original on 2014-11-11.
"When to base64 encode images (and when not to)". 28 August 2011. Archived from the original on 2023-08-29.
"7.3. Base64 utility methods". HTML 5.2 Editor's Draft. World Wide Web Consortium. Retrieved 2 January 2018. Introduced by changeset 5814 Archived 2014-02-22 at the Wayback Machine, 2021-02-01.
"6PACK a "real time" PC to TNC protocol". Archived from the original on 2012-02-24. Retrieved 2013-05-19.

Base64 (English Wikipedia)

ancestry.com (Global: 858th place; English: 569th place)

homepages.rootsweb.ancestry.com

base64.online (Global: low place; English: low place)

davidbcalhoun.com (Global: low place; English: low place)

doi.org (Global: 2nd place; English: 2nd place)

freepage.de (Global: low place; English: low place)

private.freepage.de

gnu.org (Global: 1,475th place; English: 1,188th place)

html5.org (Global: low place; English: low place)

iacr.org (Global: 5,032nd place; English: 3,357th place)

eprint.iacr.org

ietf.org (Global: 214th place; English: 176th place)

datatracker.ietf.org

jsfiddle.net (Global: low place; English: low place)

mentalfloss.com (Global: 1,139th place; English: 709th place)

mozilla.org (Global: 1,686th place; English: 1,293rd place)

developer.mozilla.org

openbsd.org (Global: low place; English: 6,737th place)

cvsweb.openbsd.org

rfc-editor.org (Global: 6,184th place; English: 4,465th place)

w3c.github.io (Global: low place; English: low place)

web.archive.org (Global: 1st place; English: 1st place)

ancestry.com (Global: 858^th place; English: 569^th place)

doi.org (Global: 2^nd place; English: 2^nd place)

gnu.org (Global: 1,475^th place; English: 1,188^th place)

iacr.org (Global: 5,032^nd place; English: 3,357^th place)

ietf.org (Global: 214^th place; English: 176^th place)

mentalfloss.com (Global: 1,139^th place; English: 709^th place)

mozilla.org (Global: 1,686^th place; English: 1,293^rd place)

openbsd.org (Global: low place; English: 6,737^th place)

rfc-editor.org (Global: 6,184^th place; English: 4,465^th place)

web.archive.org (Global: 1^st place; English: 1^st place)