Function isValidBase64URL

packages/zod/src/v4/core/schemas.ts:957–962

(data: string)

//////////////////////////////   ZodBase64   //////////////////////////////
export function isValidBase64URL(data: string): boolean {
  if (!regexes.base64url.test(data)) return false;
  const base64 = data.replace(/[-_]/g, (c) => (c === "-" ? "+" : "/"));
  const padded = base64.padEnd(Math.ceil(base64.length / 4) * 4, "=");
  return isValidBase64(padded);
}

export interface $ZodBase64URLDef extends $ZodStringFormatDef<"base64url"> {}
export interface $ZodBase64URLInternals extends $ZodStringFormatInternals<"base64url"> {}