---
title: Strings
summary: null
url: https://www.fastly.com/documentation/reference/vcl/functions/strings
---

- [cstr_escape](https://www.fastly.com/documentation/reference/vcl/functions/strings/cstr-escape/)
- [json.escape](https://www.fastly.com/documentation/reference/vcl/functions/strings/json-escape/)
- [regsub](https://www.fastly.com/documentation/reference/vcl/functions/strings/regsub/)
- [regsuball](https://www.fastly.com/documentation/reference/vcl/functions/strings/regsuball/)
- [std.anystr2ip](https://www.fastly.com/documentation/reference/vcl/functions/strings/std-anystr2ip/)
- [std.atof](https://www.fastly.com/documentation/reference/vcl/functions/strings/std-atof/)
- [std.atoi](https://www.fastly.com/documentation/reference/vcl/functions/strings/std-atoi/)
- [std.basename](https://www.fastly.com/documentation/reference/vcl/functions/strings/std-basename/)
- [std.dirname](https://www.fastly.com/documentation/reference/vcl/functions/strings/std-dirname/)
- [std.ip](https://www.fastly.com/documentation/reference/vcl/functions/strings/std-ip/)
- [std.ip2str](https://www.fastly.com/documentation/reference/vcl/functions/strings/std-ip2str/)
- [std.itoa](https://www.fastly.com/documentation/reference/vcl/functions/strings/std-itoa/)
- [std.itoa_charset](https://www.fastly.com/documentation/reference/vcl/functions/strings/std-itoa-charset/)
- [std.prefixof](https://www.fastly.com/documentation/reference/vcl/functions/strings/std-prefixof/)
- [std.replace](https://www.fastly.com/documentation/reference/vcl/functions/strings/std-replace/)
- [std.replace_prefix](https://www.fastly.com/documentation/reference/vcl/functions/strings/std-replace-prefix/)
- [std.replace_suffix](https://www.fastly.com/documentation/reference/vcl/functions/strings/std-replace-suffix/)
- [std.replaceall](https://www.fastly.com/documentation/reference/vcl/functions/strings/std-replaceall/)
- [std.str2ip](https://www.fastly.com/documentation/reference/vcl/functions/strings/std-str2ip/)
- [std.strcasecmp](https://www.fastly.com/documentation/reference/vcl/functions/strings/std-strcasecmp/)
- [std.strlen](https://www.fastly.com/documentation/reference/vcl/functions/strings/std-strlen/)
- [std.strpad](https://www.fastly.com/documentation/reference/vcl/functions/strings/std-strpad/)
- [std.strrep](https://www.fastly.com/documentation/reference/vcl/functions/strings/std-strrep/)
- [std.strrev](https://www.fastly.com/documentation/reference/vcl/functions/strings/std-strrev/)
- [std.strstr](https://www.fastly.com/documentation/reference/vcl/functions/strings/std-strstr/)
- [std.strtof](https://www.fastly.com/documentation/reference/vcl/functions/strings/std-strtof/)
- [std.strtol](https://www.fastly.com/documentation/reference/vcl/functions/strings/std-strtol/)
- [std.suffixof](https://www.fastly.com/documentation/reference/vcl/functions/strings/std-suffixof/)
- [std.tolower](https://www.fastly.com/documentation/reference/vcl/functions/strings/std-tolower/)
- [std.toupper](https://www.fastly.com/documentation/reference/vcl/functions/strings/std-toupper/)
- [substr](https://www.fastly.com/documentation/reference/vcl/functions/strings/substr/)
- [urldecode](https://www.fastly.com/documentation/reference/vcl/functions/strings/urldecode/)
- [urlencode](https://www.fastly.com/documentation/reference/vcl/functions/strings/urlencode/)
- [xml_escape](https://www.fastly.com/documentation/reference/vcl/functions/strings/xml-escape/)