How to upload the favicon for my own coin?

General
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1

It will be great if there is a zero coding method for this. Thank you!

2

I guess you mean on algoexplorer.io
If yes, you need to contact Randlabs:
Algorand (ALGO) Blockchain Explorer

See Questions about TestNet and Updating ASA Tokens - #2 by fabrice too

3

i think you want to upload it here GitHub - tinymanorg/asa-list: Tinyman - Algorand Standard Assets List