Paste ELF binary as base64, or raw bytes as hex (e.g. 93 00 10 00 or 0x00100093). Assemble with riscv32-unknown-elf-gcc -march=rv32i -mabi=ilp32 -nostdlib -o prog.elf prog.s then base64 -i prog.elf (macOS) or base64 < prog.elf.
93 00 10 00
0x00100093
riscv32-unknown-elf-gcc -march=rv32i -mabi=ilp32 -nostdlib -o prog.elf prog.s
base64 -i prog.elf
base64 < prog.elf