/// <reference types="node" />
export declare const isApng: (data: File | string) => boolean;
export declare const isAvif: (data: File | string) => boolean;
export declare const isGif: (data: File | string) => boolean;
export declare const isJpeg: (data: File | string | Buffer) => boolean;
export declare const isPng: (data: File | string | Buffer) => boolean;
export declare const isSvg: (data: File | string) => boolean;
export declare const isWebp: (data: File | string) => boolean;
export declare const isTiff: (data: File | string) => boolean;