diff --git a/backend/src/lib/validator/validate-url.test.ts b/backend/src/lib/validator/validate-url.test.ts
index 2f0f6d734..3ed5cb446 100644
--- a/backend/src/lib/validator/validate-url.test.ts
+++ b/backend/src/lib/validator/validate-url.test.ts
@@ -1,5 +1,4 @@
 import { isFQDN } from "./validate-url";
-import { isURL } from "./validate-url";
 
 describe("isFQDN", () => {
   test("Non wildcard", () => {
@@ -14,46 +13,3 @@ describe("isFQDN", () => {
     expect(isFQDN("*.example.com")).toBeFalsy();
   });
 });
-
-
-describe("isURL", () => {
-  test("Valid HTTPS URL with subdomain", () => {
-    expect(isURL("https://sub.domain.example.com")).toBe(true);
-  });
-
-  test("Valid IPv6 host", () => {
-    expect(isURL("http://[2001:db8::1]")).toBe(true);
-  });
-
-  test("Valid URL with query and fragment", () => {
-    expect(isURL("https://example.com/path?query=value#fragment")).toBe(true);
-  });
-
-  test("Fails on missing protocol when required", () => {
-    expect(isURL("example.com")).toBe(false);
-  });
-
-  test("Fails on invalid protocol", () => {
-    expect(isURL("abcd://example.com")).toBe(false);
-  });
-
-  test("Fails on malformed IPv6 (missing brackets)", () => {
-    expect(isURL("http://2001:db8::1")).toBe(false);
-  });
-
-  test("Fails on non-numeric port", () => {
-    expect(isURL("http://example.com:abc")).toBe(false);
-  });
-
-  test("Fails on port out of range", () => {
-    expect(isURL("http://example.com:70000")).toBe(false);
-  });
-
-  test("Fails on space in URL", () => {
-    expect(isURL("http://exa mple.com")).toBe(false);
-  });
-
-  test("Fails protocol-relative URL", () => {
-    expect(isURL("//example.com")).toBe(false);
-  });
-});
diff --git a/backend/src/lib/validator/validate-url.ts b/backend/src/lib/validator/validate-url.ts
index 7f7659166..a4c07b37d 100644
--- a/backend/src/lib/validator/validate-url.ts
+++ b/backend/src/lib/validator/validate-url.ts
@@ -1,6 +1,6 @@
 import dns from "node:dns/promises";
 
-import { isIP, isIPv4 } from "net";
+import { isIPv4 } from "net";
 import RE2 from "re2";
 
 import { getConfig } from "@app/lib/config/env";
@@ -133,114 +133,3 @@ export const isFQDN = (str: string, options: FQDNOptions = {}): boolean => {
     return true;
   });
 };
-
-type URLValidationOptions = {
-  protocols?: string[];
-  require_tld?: boolean;
-  require_protocol?: boolean;
-  require_host?: boolean;
-  require_port?: boolean;
-  require_valid_protocol?: boolean;
-  allow_underscores?: boolean;
-  allow_trailing_dot?: boolean;
-  allow_protocol_relative_urls?: boolean;
-  validate_length?: boolean;
-  max_allowed_length?: number;
-  disallow_auth?: boolean;
-};
-
-const defaultUrlOptions: URLValidationOptions = {
-  protocols: ["http", "https", "ftp"],
-  require_tld: true,
-  require_protocol: true,
-  require_host: true,
-  require_port: false,
-  require_valid_protocol: true,
-  allow_underscores: false,
-  allow_trailing_dot: false,
-  allow_protocol_relative_urls: false,
-  validate_length: true,
-  max_allowed_length: 2084
-};
-
-// credits: https://github.com/validatorjs/validator.js/blob/f5da7fb6ed59b94695e6fcb2e970c80029509919/src/lib/isURL.js
-export const isURL = (str: string, options: URLValidationOptions = {}): boolean => {
-  if (typeof str !== "string") {
-    throw new TypeError("Expected a string");
-  }
-
-  const opts = { ...defaultUrlOptions, ...options };
-
-  if (!str || new RE2(/[\s<>]/).test(str)) return false; // Invalid chars like space, < >
-
-  if (opts.validate_length && str.length > opts.max_allowed_length!) return false; // URL too long
-
-  let protocol: string | undefined;
-  let host: string = "";
-  let hostname: string;
-  let port: number | undefined;
-  let portStr: string | undefined;
-  let urlWithoutAuth: string;
-
-  let split = str.split("#");
-  urlWithoutAuth = split.shift()!;
-
-  split = urlWithoutAuth.split("?");
-  urlWithoutAuth = split.shift()!;
-
-  split = urlWithoutAuth.split("://");
-  if (split.length > 1) {
-    protocol = split.shift()!.toLowerCase();
-    if (opts.require_valid_protocol && !opts.protocols!.includes(protocol)) return false; // Unsupported protocol
-  } else if (opts.require_protocol) return false; // Protocol required but missing
-  else if (urlWithoutAuth.startsWith("//")) {
-    if (!opts.allow_protocol_relative_urls) return false; // Protocol-relative not allowed
-    urlWithoutAuth = urlWithoutAuth.slice(2);
-  }
-
-  urlWithoutAuth = split.join("://");
-
-  if (!urlWithoutAuth && !opts.require_host) return true;
-
-  split = urlWithoutAuth.split("/");
-  const authority = split.shift()!;
-  const authorityParts = authority.split("@");
-
-  if (authorityParts.length > 1) {
-    if (opts.disallow_auth) return false; // Auth info not allowed
-    const auth = authorityParts.shift()!;
-    if (!auth || (auth.includes(":") && auth.split(":").length > 2)) return false; // Malformed auth
-  }
-
-  hostname = authorityParts.join("@");
-
-  const ipv6Match = hostname.match(/^\[([^\]]+)\](?::([0-9]+))?$/);
-  if (ipv6Match) {
-    host = ipv6Match[1];
-    portStr = ipv6Match[2];
-  } else {
-    const hostSplit = hostname.split(":");
-    host = hostSplit.shift()!;
-    portStr = hostSplit.length > 0 ? hostSplit.join(":") : undefined;
-  }
-
-  if (portStr !== undefined) {
-    if (!/^[0-9]+$/.test(portStr)) return false; // Port must be numeric
-    port = parseInt(portStr, 10);
-    if (port <= 0 || port > 65535) return false; // Port out of range
-  } else if (opts.require_port) return false; // Port required but missing
-
-  if (!host && opts.require_host) return false; // Host required but missing
-
-  const isHostValid =
-    isIP(host) ||
-    isFQDN(host, {
-      require_tld: opts.require_tld,
-      allow_underscores: opts.allow_underscores,
-      allow_trailing_dot: opts.allow_trailing_dot
-    });
-    
-  if (!isHostValid) return false; // Invalid host format
-
-  return true;
-};
diff --git a/backend/src/services/certificate-authority/certificate-authority-validators.ts b/backend/src/services/certificate-authority/certificate-authority-validators.ts
index 3840bd61e..3a1be7cdf 100644
--- a/backend/src/services/certificate-authority/certificate-authority-validators.ts
+++ b/backend/src/services/certificate-authority/certificate-authority-validators.ts
@@ -1,7 +1,7 @@
 import { z } from "zod";
 
 import { isValidIp } from "@app/lib/ip";
-import { isFQDN, isURL } from "@app/lib/validator/validate-url";
+import { isFQDN } from "@app/lib/validator/validate-url";
 
 const isValidDate = (dateString: string) => {
   const date = new Date(dateString);
@@ -15,10 +15,15 @@ export const validateAltNameField = z
   .trim()
   .refine(
     (name) => {
-      return isFQDN(name, { allow_wildcard: true }) || isURL(name) || z.string().email().safeParse(name).success || isValidIp(name);
+      return (
+        isFQDN(name, { allow_wildcard: true }) ||
+        z.string().url().safeParse(name).success ||
+        z.string().email().safeParse(name).success ||
+        isValidIp(name)
+      );
     },
     {
-      message: "SAN must be a valid hostname, email address, or IP address"
+      message: "SAN must be a valid hostname, email address, IP address or URL"
     }
   );
 
@@ -39,10 +44,15 @@ export const validateAltNamesField = z
       if (data === "") return true;
       // Split and validate each alt name
       return data.split(", ").every((name) => {
-        return isFQDN(name, { allow_wildcard: true }) || z.string().email().safeParse(name).success || isValidIp(name);
+        return (
+          isFQDN(name, { allow_wildcard: true }) ||
+          z.string().url().safeParse(name).success ||
+          z.string().email().safeParse(name).success ||
+          isValidIp(name)
+        );
       });
     },
     {
-      message: "Each alt name must be a valid hostname or email address"
+      message: "Each alt name must be a valid hostname, email address, IP address or URL"
     }
   );
diff --git a/backend/src/services/certificate-authority/internal/internal-certificate-authority-fns.ts b/backend/src/services/certificate-authority/internal/internal-certificate-authority-fns.ts
index 7d6b49af5..086737d85 100644
--- a/backend/src/services/certificate-authority/internal/internal-certificate-authority-fns.ts
+++ b/backend/src/services/certificate-authority/internal/internal-certificate-authority-fns.ts
@@ -9,8 +9,7 @@ import { getConfig } from "@app/lib/config/env";
 import { crypto } from "@app/lib/crypto/cryptography";
 import { BadRequestError } from "@app/lib/errors";
 import { ms } from "@app/lib/ms";
-import { isFQDN, isURL } from "@app/lib/validator/validate-url";
-import { isIP } from "net";
+import { isFQDN } from "@app/lib/validator/validate-url";
 import { TCertificateBodyDALFactory } from "@app/services/certificate/certificate-body-dal";
 import { TCertificateDALFactory } from "@app/services/certificate/certificate-dal";
 import { TCertificateSecretDALFactory } from "@app/services/certificate/certificate-secret-dal";
@@ -161,11 +160,11 @@ export const InternalCertificateAuthorityFns = ({
           return { type: "email", value: altName };
         }
 
-        if(isURL(altName)) {
+        if (z.string().url().safeParse(altName).success) {
           return { type: "url", value: altName };
         }
 
-        if (isIP(altName)) {
+        if (z.string().ip().safeParse(altName).success) {
           return { type: "ip", value: altName };
         }
 
@@ -435,18 +434,18 @@ export const InternalCertificateAuthorityFns = ({
           return { type: "email", value: altName };
         }
 
-        if (isFQDN(altName, { allow_wildcard: true })) {
-          return { type: "dns", value: altName };
-        }
-
-        if(isURL(altName)) {
+        if (z.string().url().safeParse(altName).success) {
           return { type: "url", value: altName };
         }
 
-        if (isIP(altName)) {
+        if (z.string().ip().safeParse(altName).success) {
           return { type: "ip", value: altName };
         }
 
+        if (isFQDN(altName, { allow_wildcard: true })) {
+          return { type: "dns", value: altName };
+        }
+
         throw new BadRequestError({ message: `Invalid SAN entry: ${altName}` });
       });