Per the spec [0], a URL can hold at least 8,000 characters.
> It is RECOMMENDED that all senders and recipients support, at a minimum, URIs with lengths of 8000 octets in protocol elements. Note that this implies some structures and on-wire representations (for example, the request line in HTTP/1.1) will necessarily be larger in some cases.
Mainstream browsers support at least 64,000 characters [1], and Chrome supports up to 2MB [2].
> It is RECOMMENDED that all senders and recipients support, at a minimum, URIs with lengths of 8000 octets in protocol elements. Note that this implies some structures and on-wire representations (for example, the request line in HTTP/1.1) will necessarily be larger in some cases.
Mainstream browsers support at least 64,000 characters [1], and Chrome supports up to 2MB [2].
[0]: https://www.rfc-editor.org/rfc/rfc9110#section-4.1-5
[1]: https://stackoverflow.com/a/417184/
[2]: https://chromium.googlesource.com/chromium/src/+/HEAD/docs/s...