pixlstash 1.0.2

Self-hosted picture library with AI tagging, semantic search, and a clean web UI

PixlStash

PixlStash is a local picture library server for organizing, filtering, and reviewing large image collections.

It provides:

• A browser-based interface
• Automatic tagging of images
• Fast metadata and tag filtering
• Smart score sorting
• Character and set organization
• Local storage of your library data
• API for integrating with other tools
• Simple keyboard shortcuts for scoring, selection, tagging, deletion and navigation.
• Integration with ComfyUI for running workflows on selected images within PixlStash.
• Plugin system for defining new filter operations that can be performed on a set of images.

PixlStash runs on your machine and serves the UI at a local web address.

Install PixlStash

Detailed installation instructions on pixlstash.dev.

First run and data location

On first run, PixlStash creates a user config directory and stores:

• Server config
• Database
• Imported media files

Model downloads: On first startup, PixlStash automatically downloads the AI models required for tagging, captioning, and quality scoring. This includes several hundred MB of model weights. Downloads are stored in the platform user data directory:

OS	Path
Linux	~/.local/share/pixlstash/downloaded_models/
macOS	~/Library/Application Support/pixlstash/downloaded_models/
Windows	%LOCALAPPDATA%\pixlstash\downloaded_models\

An internet connection is required the first time the server starts. Subsequent starts use the cached models.

If you need to use a custom config path:

python -m pixlstash.app --server-config "C:\path\to\server-config.json"

Server configuration

On first run, PixlStash generates a server-config.json file in the user config directory:

• Linux / macOS: ~/.config/pixlstash/server-config.json
• Windows: %LOCALAPPDATA%\pixlstash\server-config.json

You can also supply a custom path with --server-config <path>.

On first run in an interactive terminal, PixlStash now launches a short setup wizard for:

• image_root (storage path)
• port
• require_ssl (HTTP/HTTPS)
• watch_folders

Before the server starts, bootstrap also offers to set (or replace) the initial username/password.

You can rerun the wizard at any time with:

python -m pixlstash.app --bootstrap

When rerunning the wizard, pressing Enter keeps existing values as defaults. For watch folders:

• Press A to add one or more folders (and set delete_after_import for each).
• Press E to edit delete_after_import on existing folders.
• Press Enter to keep the existing list unchanged.

Edit the file and restart the server to apply changes.

Network and port

Key	Default	Description
host	"localhost"	Address the server binds to. Change to "0.0.0.0" to expose the server on the local network.
port	9537	TCP port the server listens on.
cors_origins	[]	Extra origins allowed to make credentialed cross-origin requests. localhost, 127.0.0.1, and the server's own LAN IP are always permitted on any port.

At startup the server detects its own LAN IP and automatically allows it on any port. This means the Vite dev server works over LAN (http://192.168.1.5:5173 → http://192.168.1.5:9537) without any extra configuration, as long as network access is enabled via host.

Use cors_origins only if you need to allow origins on a different machine entirely.

SSL / HTTPS

Key	Default	Description
require_ssl	false	Enable HTTPS. When true, the server will use the key and certificate below.
ssl_keyfile	<config_dir>/ssl/key.pem	Path to the SSL private key file.
ssl_certfile	<config_dir>/ssl/cert.pem	Path to the SSL certificate file.
cookie_samesite	"Lax"	SameSite attribute for session cookies ("Lax", "Strict", or "None").
cookie_secure	false	Set the Secure flag on session cookies. Enable when serving over HTTPS.

Storage

Key	Default	Description
image_root	<config_dir>/images	Directory where imported media files are stored.
watch_folders	[]	List of folder entries to watch for new images and automatically import them. Each entry is an object with the fields below.

Each entry in watch_folders has the following fields:

Field	Type	Default	Description
folder	string	—	Absolute path to the directory to monitor (recursively).
delete_after_import	boolean	false	When true, source files are deleted from the watch folder after a successful import.

Example:

"watch_folders": [
  { "folder": "/home/user/downloads/photos", "delete_after_import": false },
  { "folder": "/mnt/camera", "delete_after_import": true }
]

Processing

Key	Default	Description
default_device	"cpu"	Device used for AI processing ("cpu" or "cuda").
generate_thumbnails_on_startup	true	Generate missing thumbnails when the server starts.

To remove stale database records for missing source files at startup, run:

python -m pixlstash.app --cleanup-missing-pictures

Logging

Key	Default	Description
log_level	"info"	Log verbosity ("debug", "info", "warning", "error").
log_file	<config_dir>/server.log	Path to the log file.

Example config

{
  "host": "localhost",
  "port": 9537,
  "log_level": "info",
  "require_ssl": false,
  "image_root": "/home/user/.config/pixlstash/images",
  "watch_folders": [
    { "folder": "/path/to/photos", "delete_after_import": false }
  ],
  "default_device": "cpu",
  "generate_thumbnails_on_startup": true
}

Upgrade PixlStash

Detailed installation instructions on pixlstash.dev.

Installing plugins

PixlStash supports built-in plugins and user-created plugins.

User plugin directory

Place your .py plugin files in the platform-specific user data directory. PixlStash logs the exact path on startup.

OS	Path
Linux	~/.local/share/pixlstash/image-plugins/user/
macOS	~/Library/Application Support/pixlstash/image-plugins/user/
Windows	%LOCALAPPDATA%\pixlstash\image-plugins\user\

Writing a plugin

Use the template from pixlstash/image_plugins/built-in/plugin_template.py in the source repository as a starting point:

1. Create a new .py file in your user plugin directory.
2. Subclass ImagePlugin, set a unique name and plugin_id, and implement run().
3. Restart PixlStash Server — plugins are loaded at startup.

plugin_template.py is ignored by plugin discovery and will not be loaded as a plugin.

Plugin licensing

PixlStash backend core is GPL-3.0, but the plugin authoring API files pixlstash/image_plugins/base.py and pixlstash/image_plugins/built-in/plugin_template.py are MIT-licensed.

This means user plugins that only rely on that plugin API/template may use any license chosen by the plugin author.

If a plugin copies substantial GPL backend code or depends directly on other GPL-only backend internals, different obligations may apply.

Troubleshooting

• If the page does not load, confirm the server process is running.
• If port 9537 is in use, set a different port in your server config file.
• If frontend assets are missing, rebuild frontend with npm run build and restart the server.
• Mobile browsers: the UI is designed for desktop. Mobile may work for basic browsing but is not a supported layout in 1.0.0.

Docker Images

PixlStash maintains separate Dockerfiles:

• Dockerfile: CPU image
• Dockerfile.gpu: GPU image (NVIDIA CUDA)

Build locally:

# CPU
docker build -f Dockerfile -t pixlstash:cpu .

# GPU
docker build -f Dockerfile.gpu -t pixlstash:gpu .

Run locally:

# CPU
docker run --rm -p 9537:9537 -v pixlstash_data:/home/pixlstash pixlstash:cpu

# GPU
docker run --rm --gpus all -p 9537:9537 -v pixlstash_data:/home/pixlstash pixlstash:gpu

GitHub Actions uses the same split in .github/workflows/docker-publish.yml:

• CPU publish job builds from Dockerfile
• GPU publish job builds from Dockerfile.gpu

GPU startup fails (CUDAExecutionProvider unavailable)

If startup reports that ONNX CUDAExecutionProvider is unavailable, you likely have CPU-only ONNX Runtime installed.

Fix your environment:

pip uninstall -y onnxruntime
pip install onnxruntime-gpu

It some cases you may have to uninstall onnxruntime-gpu and reinstall it.

Verify providers:

python -c "import onnxruntime as ort; print(ort.get_available_providers())"

Expected output should include CUDAExecutionProvider.

If you prefer CPU mode, set "default_device": "cpu" in server-config.json.