python-log-viewer 1.0.0

A beautiful, real-time log viewer with a web UI. Works with Django, Flask, and FastAPI.

python-log-viewer

A beautiful, real-time log viewer with a dark-themed web UI. Browse, search, filter, clear, and delete log files — all from your browser.

Integrates seamlessly with Django, Flask, and FastAPI.

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Features

• 📁 File browser — sidebar with folder tree, file sizes
• 🔍 Search & filter — full-text search, log-level filtering (DEBUG / INFO / WARNING / ERROR)
• 🎨 Colour-coded — log levels highlighted with subtle background colours
• 🔄 Auto-refresh — configurable live-tail (5s, 10s, 30s, 1m, or manual)
• 📜 Line limits — last 500 / 1000 / 2500 / 5000 / all entries
• 🗑️ File actions — clear (truncate) or delete log files with confirmation modals
• 🔒 Basic Auth — optional HTTP Basic Authentication
• 📱 Responsive — works on mobile with a slide-out sidebar

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Installation

pip install python-log-viewer

Framework extras

pip install python-log-viewer[django]    # Django integration
pip install python-log-viewer[flask]     # Flask integration
pip install python-log-viewer[fastapi]   # FastAPI integration
pip install python-log-viewer[all]       # All frameworks

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Django Integration

1. Install

pip install python-log-viewer[django]

2. Add to INSTALLED_APPS

INSTALLED_APPS = [
    # ...
    "python_log_viewer.contrib.django",
]

3. Include URLs

# urls.py
from django.urls import path, include

urlpatterns = [
    # ...
    path("logs/", include("python_log_viewer.contrib.django.urls")),
]

4. Configure (optional)

Add any of these to your settings.py:

# Path to your log directory (default: BASE_DIR / "logs")
LOG_VIEWER_DIR = BASE_DIR / "logs"

# UI defaults
LOG_VIEWER_AUTO_REFRESH  = True    # enable auto-refresh
LOG_VIEWER_REFRESH_TIMER = 5000    # refresh interval in ms
LOG_VIEWER_AUTO_SCROLL   = True    # auto-scroll to bottom
LOG_VIEWER_COLORIZE      = True    # colour-coded log levels

# Authentication (optional — leave unset to disable)
LOG_VIEWER_USERNAME = "admin"
LOG_VIEWER_PASSWORD = "secret"

# Allow logged-in Django superusers to bypass Basic Auth (default: True)
LOG_VIEWER_SUPERUSER_ACCESS = True

Then visit http://localhost:8000/logs/ in your browser.

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Flask Integration

1. Install

pip install python-log-viewer[flask]

2. Register the blueprint

from flask import Flask
from python_log_viewer.contrib.flask import create_log_viewer_blueprint

app = Flask(__name__)

app.register_blueprint(
    create_log_viewer_blueprint(
        log_dir="./logs",
        url_prefix="/logs",
        username="admin",      # optional
        password="secret",     # optional
    )
)

if __name__ == "__main__":
    app.run(debug=True)

Then visit http://localhost:5000/logs/ in your browser.

Blueprint parameters:

Parameter	Default	Description
log_dir	"./logs"	Path to log directory
url_prefix	"/logs"	URL prefix
username	None	Basic-Auth username
password	None	Basic-Auth password
auto_refresh	True	Enable auto-refresh
refresh_timer	5000	Refresh interval (ms)
auto_scroll	True	Auto-scroll to bottom
colorize	True	Colour-coded levels

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FastAPI Integration

1. Install

pip install python-log-viewer[fastapi]

2. Include the router

from fastapi import FastAPI
from python_log_viewer.contrib.fastapi import create_log_viewer_router

app = FastAPI()

app.include_router(
    create_log_viewer_router(
        log_dir="./logs",
        prefix="/logs",
        username="admin",      # optional
        password="secret",     # optional
    )
)

Then visit http://localhost:8000/logs/ in your browser.

Router parameters:

Parameter	Default	Description
log_dir	"./logs"	Path to log directory
prefix	"/logs"	URL prefix
username	None	Basic-Auth username
password	None	Basic-Auth password
auto_refresh	True	Enable auto-refresh
refresh_timer	5000	Refresh interval (ms)
auto_scroll	True	Auto-scroll to bottom
colorize	True	Colour-coded levels

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Using the Core API Directly

The core classes have zero dependencies and can be used in any Python application:

from python_log_viewer.core import LogDirectory, LogReader

# Point to your log directory
log_dir = LogDirectory("/var/log/myapp")

# List all files
for f in log_dir.list_files():
    print(f"{f.name}  {f.size} bytes  modified={f.modified}")

# Read and filter log entries
reader = LogReader(log_dir)
result = reader.read(
    file="app.log",
    lines=100,
    level="ERROR",
    search="database",
)
print(f"Total matching entries: {result['total']}")
for line in result["lines"]:
    print(line)

# File operations
log_dir.clear_file("app.log")    # truncate to 0 bytes
log_dir.delete_file("old.log")   # permanently remove

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Environment Variables

Configuration can be set via environment variables (useful for Docker / CI):

Variable	Description
LOG_VIEWER_USERNAME	Basic-Auth username
LOG_VIEWER_PASSWORD	Basic-Auth password

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Development

# Clone
git clone https://github.com/imsujan276/python-log-viewer.git
cd python-log-viewer

# Install in editable mode
pip install -e ".[all]"

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License

MIT