Tools› canonical_id Generator

canonical_id Generator

Compute the canonical_id for a comic from its first-page image URL. Everything runs in your browser — no data is sent to a server.

Enter the direct URL of the image file served on page 1 of the comic (not the webpage URL).

How it works

The canonical_id is a SHA-256 hash of the normalized image URL. See the canonical_id documentation for the full algorithm. In brief:

  1. Lowercase the URL
  2. Remove query string and fragment (?…, #…)
  3. Remove https:// or http://
  4. Remove www. prefix
  5. Remove trailing /
  6. Compute SHA-256 → 64-character lowercase hex string