A small collection of custom ComfyUI nodes by hwprinz, covering seed/noise control, simple latent/size utilities, and an advanced multi-format image save node.

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Nodes

| Node | File | Purpose | |---|---|---| | HWP Global Seed | global_seed.py | Broadcasts one seed value to every seed / noise_seed int widget in the workflow | | HWP Seed Node | seed_node.py | Local (non-broadcasting) seed + noise source for a single sampler | | HWP Get Side (Latent) | get_side_from_latent.py | Returns the longest/shortest pixel-space dimension of a LATENT | | HWP Get Side (X/Y) | get_side_from_xy.py | Returns the longest/shortest of a width/height pair | | HWP Save Image (Advanced) | image_save.py | Multi-format save (PNG/JPG/WEBP/TIFF/ICO) with timestamps, metadata, blind watermark and per-file logging |

Finding the nodes

All nodes are registered under the HWP category. To find them, just type HWP into the node search (right-click canvas → Add Node):

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HWP Global Seed

File: nodes/global_seed.py · Category: HWP

Global seed controller for ComfyUI workflows. Distributes a single seed value to every other seed / seed_num / noise_seed int widget in the workflow, so you only need to manage one seed control instead of one per sampler. This is the seed value only — the node's noise output is a separate NOISE object that you wire like any other output; it is not broadcast (see Outputs below).

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Inputs

| Input | Type | Default | Description | |---|---|---|---| | value | INT | 0 | The base seed | | mode | ENUM | control_before_generate | control_before_generate computes the next seed before this run's prompt is sent (this run uses the new value); control_after_generate uses the current value now and prepares the next one for the following queue | | action | ENUM | fixed | fixed, increment, decrement, randomize, or their ... for each node variants (see below) | | max_seed | INT | 0 (→ 1125899906842624) | Ceiling that increment/decrement wraps at | | logging | ENUM | default | default logs one summary line per run; verbose also logs per-node seed updates |

The plain action variants advance one shared value for every node. The ... for each node variants give each downstream seed widget its own successive value — e.g. increment for each node hands out value, value+1, value+2, …

Outputs

| Output | Type | Description | |---|---|---| | seed | INT | The resolved seed value. On this (global) node it is also broadcast to every seed / seed_num / noise_seed int widget in the workflow — or wired to a single INT input like any other output | | noise | NOISE | The same seed wrapped as a ready-to-use noise object (via ComfyUI's own Noise_RandomNoise) — useful for workflows (e.g. Flux.2 / SamplerCustomAdvanced) that need a NOISE input directly, without a separate RandomNoise converter node. Wired, not broadcast: connect it to a NOISE input — unlike the seed value it is never auto-applied, so it must always be connected |

HWP Seed Node

File: nodes/seed_node.py · Category: HWP

A local seed + noise source — the non-global counterpart of HWP Global Seed. It looks and behaves like HWP Global Seed (see screenshot above) — the only difference is that it does not broadcast anything: the outputs only reach the node(s) you explicitly wire them to. It exposes the same seed/noise outputs and the same fixed/increment/decrement/randomize actions. Use it when you want a controllable seed for one specific sampler without touching the rest of the workflow.

Inputs

| Input | Type | Default | Description | |---|---|---|---| | value | INT | 0 | The base seed | | mode | ENUM | control_before_generate | Same semantics as HWP Global Seed | | action | ENUM | fixed | fixed, increment, decrement, or randomize | | max_seed | INT | 0 (→ 1125899906842624) | Ceiling that increment/decrement wraps at, and cap for randomize | | logging | ENUM | default | default logs one summary line per run; verbose also logs per-run seed detail |

Outputs

| Output | Type | Description | |---|---|---| | seed | INT | The resolved seed value — applied only to the node(s) you wire it to (this node broadcasts nothing) | | noise | NOISE | The same seed wrapped as a ready-to-use noise object (via ComfyUI's own Noise_RandomNoise) — wired, not broadcast: connect it to a NOISE input, like this node's seed |

HWP Get Side (Latent)

File: nodes/get_side_from_latent.py · Category: HWP

Takes a LATENT input and returns either its longest or shortest pixel-space dimension (auto-converted from latent space via ×8), selected with a longest/shortest toggle.

The computed value is also displayed below the node after a run (bare number, like the built-in Get Image Size node).

Inputs

| Input | Type | Default | Description | |---|---|---|---| | latent | LATENT | — | The latent to measure | | side | ENUM | longest | longest or shortest |

Outputs

| Output | Type | Description | |---|---|---| | side | INT | The selected pixel-space dimension |

HWP Get Side (X/Y)

File: nodes/get_side_from_xy.py · Category: HWP

Takes width/height integers and returns either the longest or shortest of the two, selected with the same longest/shortest toggle.

The computed value is also displayed below the node after a run (bare number, like the built-in Get Image Size node).

Inputs

| Input | Type | Default | Description | |---|---|---|---| | width | INT | — | Width value | | height | INT | — | Height value | | side | ENUM | longest | longest or shortest |

Outputs

| Output | Type | Description | |---|---|---| | side | INT | The selected value |

HWP Save Image (Advanced)

File: nodes/image_save.py · Category: HWP

An advanced terminal save node modeled on LayerStyle's SaveImage Plus (Advanced), extended with TIFF, WEBP and multi-resolution ICO output. Unlike the core Save Image node it writes exactly the file the widget says, keeps a per-file -> Saved image to <full path> log line for every written file, and supports timestamped filenames, workflow metadata and an invisible blind watermark.

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Inputs

| Input | Type | Default | Description | |---|---|---|---| | images | IMAGE | — | The image batch to save (one file per image) | | custom_path | STRING | "" | Directory to save into (created if missing); empty = ComfyUI's output/ folder. Supports %date and %time tokens | | filename_prefix | STRING | comfyui | Base filename; also supports %date and %time tokens | | timestamp | ENUM | None | Appends _NNNNN (counter), _YYYY-MM-DD_HH-MM-SS (second) or _YYYY-MM-DD_HH-MM-SS-mmm (millisecond) to the filename | | format | ENUM | png | png, jpg, webp, webp (lossless), tiff, ico | | quality | INT | 100 | See the per-format table below — hidden in the UI when the format ignores it (webp (lossless), tiff, ico) | | ico_sizes | ENUM | Medium (64, 128, 256) | ICO resolution preset — hidden in the UI until format is ico (the value is still sent and ignored for other formats) | | meta_data | BOOLEAN | False | Embed the workflow prompt + metadata (PNG text chunks, or EXIF UserComment JSON for jpg/webp/tiff). Honours the core --disable-metadata flag. ICO cannot store metadata (a warning is logged) | | blind_watermark | STRING | "" | Text to embed invisibly (QR payload spread across the full RGB image — lossless PNG output preserves it). Extractable with the blind_watermark library using password_img=1, password_wm=1; images too small to carry the payload are saved without it (a warning is logged) | | preview | BOOLEAN | True | Show a result image in the UI. When saving to a custom_path the real files land there and a PNG preview is shown instead (saved to temp) |

No output. This is a terminal node.

Formats and quality

| Format | Extension | Quality widget | Encoding | |---|---|---|---| | png | .png | compression level (100 − q) // 10 (q 100 → level 0) | lossless, alpha preserved | | jpg | .jpg | JPEG quality | 4:4:4 (subsampling=0); RGBA is composited over white | | webp | .webp | WEBP quality | lossy, method=6 (slowest, best ratio), alpha preserved | | webp (lossless) | .webp | ignored | lossless, method=6, alpha preserved | | tiff | .tiff | ignored | LZW — lossless, suited for final archive quality, alpha preserved | | ico | .ico | ignored | multi-resolution ICO, 32-bit RGBA |

ICO multi-resolution: the ico_sizes preset picks the embedded sizes (e.g. Small (32, 48, 64)). Every size is resampled by PIL directly from the full-resolution source image — some other packs pre-resize the frames first and end up upscaling from the smallest entry, which is why their "multi-resolution" output looks soft; that defect does not apply here.

Metadata layout: PNG files get the prompt and each extra_pnginfo key as text chunks; JPG/WEBP/TIFF get a JSON blob {"prompt": …, …extra_pnginfo} in the EXIF UserComment tag (same layout as the other HWP-ecosystem save nodes).

Shared Behaviour

Seed/noise pairing: HWP Global Seed and HWP Seed Node both emit seed (INT) and noise (NOISE, via ComfyUI's Noise_RandomNoise), so either can feed a SamplerCustomAdvanced-style graph directly with no extra converter node.
Broadcast vs. wired (the key distinction): the seed value of HWP Global Seed is broadcast to every seed / seed_num / noise_seed int widget in the workflow — that is the "global" part. A noise output, on either node, is a NOISE object and is not broadcast: it always has to be wired to a NOISE input such as SamplerCustomAdvanced. HWP Seed Node is fully local — both its seed and its noise reach only the node(s) you wire them to.
Manual randomize: both seed nodes get a client-side 🎲 "Manual Random Seed" button and live value/last_seed widget updates from the bundled JS extensions (web/global_seed.js, web/seed_node.js). They coexist in the same workflow without interfering with each other.
Logging: both seed nodes support default (one summary line per run) and verbose (adds per-node/per-run seed detail) logging modes.

Installation

cd ComfyUI/custom_nodes
git clone https://github.com/hwprinz/ComfyUI-HWP-Nodes

The blind watermark of HWP Save Image (Advanced) needs two extra Python packages that ComfyUI does not install automatically for clone installs. Run this once from the clone folder:

cd ComfyUI-HWP-Nodes
python -m pip install -r requirements.txt

Restart ComfyUI.

License

MIT