Ino String To Alphabetic String

Ever need a short, filename-safe, letters-only key derived from some arbitrary string - a Civitai model ID, a seed, a URL - and found yourself writing a hashing routine inside a workflow? Ino String To Alphabetic String is that routine as a node. It hashes whatever string you feed it and emits a fixed-length, lowercase-a–z identifier that's deterministic: same input in, same output out, every single time.

It's part of the ComfyUI Ino Nodes pack (nobandegani/ComfyUI-InoNodes).

How it works

The mechanism is simple and worth knowing, because it explains everything about the output:

1. It takes the SHA-256 hash of the input string.
2. Base-32 encodes that digest.
3. Maps the encoded characters onto the alphabet a–z (digits become letters), so the result contains only letters.
4. Truncates to your chosen length.

So mjp043n85se4z (the default input, which looks suspiciously like a Civitai ID) becomes an 8-letter string by default. Bump length up to 64 for a longer key - the input field ranges from 1 to 64. Two inputs, one string output.

Why you'd reach for it

Two properties make it worth having. Deterministic: run the same model ID through it in five different workflows and you get the same key, so it works as a stable naming scheme. Letters-only: the output is safe in contexts that reject digits or special characters - a filename component, a URL slug, an identifier in a system with strict character rules.

It's a niche tool, and the honest note is that for most people the "alphabetic-only" requirement never actually comes up - a plain hash or the pack's other string ops cover you. But the moment you're building a naming convention across automated runs (batch folders, S3 keys, dataset labels), a stable 8-letter slug from a messy input is quietly very convenient. It's also not reversible - it's a hash, not an encoding, so don't expect to recover the original string from it.

Install

# ComfyUI Manager: search "ComfyUI Ino Nodes", install, restart
# or manually:
cd ComfyUI/custom_nodes
git clone https://github.com/nobandegani/ComfyUI-InoNodes.git
cd ComfyUI-InoNodes
pip install -r requirements.txt

Restart ComfyUI after. No models, no services - requirements.txt installs the pack's core dependency inopyutils. The pack runs on ComfyUI's V3 schema, so keep ComfyUI current (v0.18.1+); and the README's cd comfyui_ino_nodes is a typo for the ComfyUI-InoNodes folder.

If your keys come out shorter than you set, that's expected at the edge - the truncation happens after hashing, so length is a cap, not a guarantee of fresh entropy beyond the hash's range. For the intended use (stable IDs from arbitrary input) it's fine; just don't use a tiny length if you need collision resistance across thousands of items.