Function isValidBase64

packages/zod/src/v4/core/schemas.ts:913–925

(data: string)

//////////////////////////////   ZodBase64   //////////////////////////////
export function isValidBase64(data: string): boolean {
  if (data === "") return true;
  // atob ignores whitespace, so reject it up front.
  if (/\s/.test(data)) return false;
  if (data.length % 4 !== 0) return false;
  try {
    // @ts-ignore
    atob(data);
    return true;
  } catch {
    return false;
  }
}

export interface $ZodBase64Def extends $ZodStringFormatDef<"base64"> {}
export interface $ZodBase64Internals extends $ZodStringFormatInternals<"base64"> {}