diff --git a/src/debug/README.md b/src/debug/README.md
new file mode 100644
index 00000000..97a95439
--- /dev/null
+++ b/src/debug/README.md
@@ -0,0 +1,54 @@
+# Debug Logging in the Console
+
+## Overview
+
+Logging is controlled via a querystring parameter:
+
+```
+?log=<level>
+```
+
+This system works by overriding `console.*` methods at app startup.
+
+---
+
+# Supported Log Levels
+
+| Level | Behavior                    |
+| ----- | --------------------------- |
+| none  | No logs                     |
+| error | Errors only                 |
+| warn  | Warnings + errors (default) |
+| info  | Info + warn + error         |
+| debug | All logs                    |
+| all   | All logs                    |
+
+---
+
+# Notes
+
+## Default Behavior
+
+- Defaults to `warn`
+- Ensures important issues are always visible
+
+---
+
+## Page Reload Required
+
+Changing the querystring requires a manual refresh.
+
+---
+
+## Global Impact
+
+This override affects **all console calls globally**, including third-party libraries.
+
+---
+
+# `console.*` considerations
+
+- Use `console.error` for real failures
+- Use `console.warn` for unexpected but non-breaking issues
+- Use `console.log` for debugging only
+- Avoid leaving excessive logs in production code
diff --git a/src/debug/consoleOverride.js b/src/debug/consoleOverride.js
new file mode 100644
index 00000000..326941e1
--- /dev/null
+++ b/src/debug/consoleOverride.js
@@ -0,0 +1,36 @@
+const LEVEL_MAP = {
+  none: 0,
+  error: 1,
+  warn: 2,
+  info: 3,
+  debug: 4,
+  all: 4,
+};
+
+const METHOD_LEVEL = {
+  error: 1,
+  warn: 2,
+  info: 3,
+  log: 4,
+  debug: 4,
+  trace: 4,
+};
+
+export function overrideConsole(config) {
+  const allowedLevel = LEVEL_MAP[config.logLevel];
+
+  const originalConsole = {
+    error: console.error.bind(console),
+    warn: console.warn.bind(console),
+    info: console.info.bind(console),
+    log: console.log.bind(console),
+    debug: console.debug ? console.debug.bind(console) : console.log.bind(console),
+    trace: console.trace ? console.trace.bind(console) : console.log.bind(console),
+  };
+
+  Object.keys(METHOD_LEVEL).forEach((method) => {
+    const methodLevel = METHOD_LEVEL[method];
+
+    console[method] = methodLevel <= allowedLevel ? originalConsole[method] : () => {};
+  });
+}
diff --git a/src/debug/debugConfig.js b/src/debug/debugConfig.js
new file mode 100644
index 00000000..ac5c7401
--- /dev/null
+++ b/src/debug/debugConfig.js
@@ -0,0 +1,10 @@
+export function getDebugConfig() {
+  const params = new URLSearchParams(window.location.search);
+
+  const level = params.get('log');
+  const validLevels = ['none', 'error', 'warn', 'info', 'debug', 'all'];
+
+  return {
+    logLevel: validLevels.includes(level) ? level : 'warn',
+  };
+}
diff --git a/src/main.jsx b/src/main.jsx
index d20721cf..209762dd 100644
--- a/src/main.jsx
+++ b/src/main.jsx
@@ -5,10 +5,14 @@ import ErrorBoundary from './components/ErrorBoundary';
 import { QRZProvider, setupMapQRZHandler } from './components/CallsignLink';
 import './styles/main.css';
 import './lang/i18n';
+import { getDebugConfig } from './debug/debugConfig';
+import { overrideConsole } from './debug/consoleOverride';
 
 // Global click handler for QRZ links in Leaflet HTML popups
 setupMapQRZHandler();
 
+overrideConsole(getDebugConfig());
+
 ReactDOM.createRoot(document.getElementById('root')).render(
   <React.StrictMode>
     <ErrorBoundary>