are the hexadecimal (percent-encoded) representations of the colon ( ) and forward slash ( ), respectively. Stack Overflow Technical Breakdown
It helps you check if a file is readable, its exact size, and if there are any hidden characters or encoding issues. 3. Rapid Local File Transfers curl-url-file-3A-2F-2F-2F
Use the -d (or --data ) flag with @ to read the entire contents of a file and send it as the request body. This is common for API calls. its exact size