With base64 you have around 6 bits per character. M$ edge max url length is shortest now at about 2038 characters. If you can drop support for edge, the next highest is Android browser at 8k. 8k characters gives you around 6000 bytes to encode into the URL. Unless your 2000 ints are utterly random and use the full spectrum of 4-8 byte integers, im sure you can find a way to compress them into 6000 bytes.