How hash batch works
This tool hashes every line in a list at once, so you can checksum a whole column of strings in one pass instead of hashing them one by one. Each line is hashed independently with the algorithm you choose, and every output hash maps to the input line at the same position.
Pick an algorithm (SHA-1, SHA-256, SHA-384, or SHA-512) and paste one string per line. The tool uses the Web Crypto API (crypto.subtle.digest), the same cryptographically secure engine as the single Hash Generator, on each line independently.
Hashing is one-way: you cannot reverse a hash to recover the input. Empty lines are preserved and produce an empty hash, so your line numbering never shifts and every input line maps to exactly one output line. The text you enter never leaves your device.