0 byte test file

Handle it in code

Each snippet below was run against this exact file with Python 3.14.4 and Node 24.15.0 when this page was built, and the output shown is what it printed.

Python

Verify the download against the SHA-256 published on this page. file_digest (Python 3.11+) reads in chunks, so a 250 MB file does not need 250 MB of memory.

import hashlib

with open("0b.bin", "rb") as f:
    print(hashlib.file_digest(f, "sha256").hexdigest())

Run against this file, it prints: e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855

Node.js

The same in Node, streaming the file through the hash.

const crypto = require('node:crypto');
const fs = require('node:fs');

const hash = crypto.createHash('sha256');
fs.createReadStream('0b.bin')
  .on('data', (chunk) => hash.update(chunk))
  .on('end', () => console.log(hash.digest('hex')));

Run against this file, it prints: e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855