OpenSea doesn't load images with 2 digits

[frangio]

The issue is not numbers with two digits, but numbers where the base-10 representation is different from base-16/hexadecimal!

EIP-1155 specifies that {id} is replaced with the hex-encoded id. Previous discussion here:

ERC1155 uri function doesn't use the tokenID?

The EIP says: The string format of the substituted hexadecimal ID MUST be lowercase alphanumeric: [0-9a-f] with no 0x prefix. The string format of the substituted hexadecimal ID MUST be leading zero padded to 64 hex characters length if necessary. So given a URI like ipfs://uri/{id}.json for token with id 250, a compliant client would have to use the last one you shared: ipfs://uri/00000000000000000000000000000000000000000000000000000000000000fa.json

ERC1155 uri function doesn't use the tokenID?

Here's an implementation in JavaScript: const makeUri = (uri, id) => uri.replace('{id}', id.toString(16).padStart(64, '0')); > makeUri('ipfs://uri/{id}.json', 250) 'ipfs://uri/00000000000000000000000000000000000000000000000000000000000000fa.json'