---
title: Plausible Analytics
description: Privacy-friendly cookieless analytics with a prebuilt helper that preserves Plausible's queue bootstrap and loader attributes.
lastModified: 2026-05-10
icon: plausible
---
Plausible Analytics is a privacy-friendly, cookieless analytics product with a lightweight script loader. The `plausibleAnalytics()` helper models Plausible's queue bootstrap and script attributes as a c15t-managed script so early `window.plausible(...)` calls are buffered safely until the tracker loads.

## Integrate with c15t

**React**

```tsx
import { type ReactNode } from 'react';
import { ConsentManagerProvider } from '@c15t/react';
import { plausibleAnalytics } from '@c15t/scripts/plausible-analytics';

const scripts = [plausibleAnalytics({ domain: 'example.com' })];

export function ConsentProvider({ children }: { children: ReactNode }) {
  return (
    <ConsentManagerProvider
      options={{
        mode: 'hosted',
        backendURL: 'https://your-instance.c15t.dev',
        scripts,
      }}
    >
      {children}
    </ConsentManagerProvider>
  );
}
```

**Next.js**

```tsx
'use client';

import { type ReactNode } from 'react';
import { ConsentManagerProvider } from '@c15t/nextjs';
import { plausibleAnalytics } from '@c15t/scripts/plausible-analytics';

const scripts = [plausibleAnalytics({ domain: 'example.com' })];

export function ConsentProvider({ children }: { children: ReactNode }) {
  return (
    <ConsentManagerProvider
      options={{
        mode: 'hosted',
        backendURL: '/api/c15t',
        scripts,
      }}
    >
      {children}
    </ConsentManagerProvider>
  );
}
```

**JavaScript**

```ts
import { getOrCreateConsentRuntime } from 'c15t';
import { plausibleAnalytics } from '@c15t/scripts/plausible-analytics';

getOrCreateConsentRuntime({
  mode: 'hosted',
  backendURL: 'https://your-instance.c15t.dev',
  scripts: [plausibleAnalytics({ domain: 'example.com' })],
});
```

## How c15t loads it

* **Category:** `measurement` (Analytics)
* **Loads when:** measurement consent is granted
* **On revocation:** unloaded — c15t removes the script element from the DOM. Plausible is cookieless, so no client-side state needs clearing.

If you need script extensions or hash-based routing support, pass them through the helper:

```ts
plausibleAnalytics({
  domain: 'example.com',
  extension: ['file-downloads', 'outbound-links'],
  hashBasedRouting: true,
})
```

The helper seeds a `window.plausible` queue stub during `onBeforeLoad`, so any calls made between the consent grant and the real script attaching get buffered into `plausible.q` and replayed. It also maps the legacy `data-domain` / `data-api` attributes and the new `scriptId`-based loader URL automatically.

## Tracking events in your app

c15t gates the Plausible script from loading until `measurement` consent is granted. Your application code that calls Plausible is **not** automatically gated — `window.plausible` does not exist until the script is loaded, so unguarded calls before consent throw.

Guard event calls by checking consent state. From React:

```tsx
import { useCallback } from 'react';
import { useConsentManager } from '@c15t/react';

function useTrackSignup() {
  const { has } = useConsentManager();

  return useCallback(() => {
    if (has('measurement')) {
      window.plausible?.('Signup');
    }
  }, [has]);
}

function SignupButton() {
  const trackSignup = useTrackSignup();

  return (
    <button type="button" onClick={trackSignup}>
      Sign up
    </button>
  );
}
```

From plain JavaScript:

```ts
import { getOrCreateConsentRuntime } from 'c15t';

const { consentStore } = getOrCreateConsentRuntime();

if (consentStore.getState().has('measurement')) {
  window.plausible?.('Signup');
}
```

## Types

### PlausibleAnalyticsOptions

|Property|Type|Description|Default|Required|
|:--|:--|:--|:--|:--:|
|scriptId|string \|undefined|Unique Plausible script ID for the new script format.|-|Optional|
|domain|string \|undefined|Legacy domain-based site identifier.|-|Optional|
|extension|PlausibleExtension \|undefined|Legacy script extensions.|-|Optional|
|customProperties|Record\<string, unknown> \|undefined|Properties tracked with each pageview.|-|Optional|
|endpoint|string \|undefined|Custom tracking endpoint.|-|Optional|
|fileDownloads|Object \|undefined|File download tracking configuration.|-|Optional|
|hashBasedRouting|boolean \|undefined|Enable hash-based routing support.|-|Optional|
|autoCapturePageviews|boolean \|undefined|Disable automatic pageview capture when set to \`false\`.|-|Optional|
|captureOnLocalhost|boolean \|undefined|Enable tracking on localhost.|-|Optional|
|scriptUrl|string \|undefined|Custom loader URL.|-|Optional|

#### `fileDownloads`

File download tracking configuration.

|Property|Type|Description|Default|Required|
|:--|:--|:--|:--|:--:|
|fileExtensions|string\[] \|undefined|-|-|Optional|

### Script

|Property|Type|Description|Default|Required|
|:--|:--|:--|:--|:--:|
|id|string|Unique identifier for the script|-|✅ Required|
|src|string \|undefined|URL of the script to load|-|Optional|
|textContent|string \|undefined|Inline JavaScript code to execute|-|Optional|
|category|HasCondition\<AllConsentNames>|Consent category or condition required to load this script|-|✅ Required|
|callbackOnly|boolean \|undefined|Whether this is a callback-only script that doesn't need to load an external resource. When true, no script tag will be added to the DOM, only callbacks will be executed.|false|Optional|
|persistAfterConsentRevoked|boolean \|undefined|Whether the script should persist after consent is revoked.|false|Optional|
|alwaysLoad|boolean \|undefined|Whether the script should always load regardless of consent state. This is useful for scripts like Google Tag Manager or PostHog that manage their own consent state internally. The script will load immediately and never be unloaded based on consent changes. Note: When using this option, you are responsible for ensuring the script itself respects user consent preferences through its own consent management.|false|Optional|
|fetchPriority|"high" \|"low" \|"auto" \|undefined|Priority hint for browser resource loading|-|Optional|
|attributes|Record\<string, string> \|undefined|Additional attributes to add to the script element|-|Optional|
|async|boolean \|undefined|Whether to use async loading|-|Optional|
|defer|boolean \|undefined|Whether to defer script loading|-|Optional|
|nonce|string \|undefined|Content Security Policy nonce|-|Optional|
|anonymizeId|boolean \|undefined|Whether to use an anonymized ID for the script element, this helps ensure the script is not blocked by ad blockers|true|Optional|
|target|"head" \|"body" \|undefined|Where to inject the script element in the DOM. Options: \`'head'\`: Scripts are appended to \`\<head>\` (default); \`'body'\`: Scripts are appended to \`\<body>\`|'head'|Optional|
|onBeforeLoad|Object \|undefined|Callback executed before the script is loaded|-|Optional|
|onLoad|Object \|undefined|Callback executed when the script loads successfully|-|Optional|
|onError|Object \|undefined|Callback executed if the script fails to load|-|Optional|
|onConsentChange|Object \|undefined|Callback executed whenever the consent store is changed. This callback only applies to scripts already loaded.|-|Optional|
|vendorId|string \|number \|undefined|IAB TCF vendor ID - links script to a registered vendor. When in IAB mode, the script will only load if this vendor has consent. Takes precedence over \`category\` when in IAB mode. Use custom vendor IDs (string or number) to gate non-IAB vendors too.|-|Optional|
|iabPurposes|number\[] \|undefined|IAB TCF purpose IDs this script requires consent for. When in IAB mode and no vendorId is set, the script will only load if ALL specified purposes have consent.|-|Optional|
|iabLegIntPurposes|number\[] \|undefined|IAB TCF legitimate interest purpose IDs. These purposes can operate under legitimate interest instead of consent. The script loads if all iabPurposes have consent OR all iabLegIntPurposes have legitimate interest established.|-|Optional|
|iabSpecialFeatures|number\[] \|undefined|IAB TCF special feature IDs this script requires. Options: 1: Use precise geolocation data; 2: Actively scan device characteristics for identification|-|Optional|

#### `onBeforeLoad`

Callback executed before the script is loaded

|Property|Type|Description|Default|Required|
|:--|:--|:--|:--|:--:|
|id|string|The original script ID|-|✅ Required|
|elementId|string|The actual DOM element ID used (anonymized if enabled)|-|✅ Required|
|hasConsent|boolean|Has consent|-|✅ Required|
|consents|ConsentState|The current consent state|-|✅ Required|
|element|HTMLScriptElement \|undefined|The script element (for load/error callbacks) Will be undefined for callback-only scripts|-|Optional|
|error|Error \|undefined|Error information (for error callbacks)|-|Optional|

#### `onLoad`

Callback executed when the script loads successfully

|Property|Type|Description|Default|Required|
|:--|:--|:--|:--|:--:|
|id|string|The original script ID|-|✅ Required|
|elementId|string|The actual DOM element ID used (anonymized if enabled)|-|✅ Required|
|hasConsent|boolean|Has consent|-|✅ Required|
|consents|ConsentState|The current consent state|-|✅ Required|
|element|HTMLScriptElement \|undefined|The script element (for load/error callbacks) Will be undefined for callback-only scripts|-|Optional|
|error|Error \|undefined|Error information (for error callbacks)|-|Optional|

#### `onError`

Callback executed if the script fails to load

|Property|Type|Description|Default|Required|
|:--|:--|:--|:--|:--:|
|id|string|The original script ID|-|✅ Required|
|elementId|string|The actual DOM element ID used (anonymized if enabled)|-|✅ Required|
|hasConsent|boolean|Has consent|-|✅ Required|
|consents|ConsentState|The current consent state|-|✅ Required|
|element|HTMLScriptElement \|undefined|The script element (for load/error callbacks) Will be undefined for callback-only scripts|-|Optional|
|error|Error \|undefined|Error information (for error callbacks)|-|Optional|

#### `onConsentChange`

Callback executed whenever the consent store is changed. This callback only applies to scripts already loaded.

|Property|Type|Description|Default|Required|
|:--|:--|:--|:--|:--:|
|id|string|The original script ID|-|✅ Required|
|elementId|string|The actual DOM element ID used (anonymized if enabled)|-|✅ Required|
|hasConsent|boolean|Has consent|-|✅ Required|
|consents|ConsentState|The current consent state|-|✅ Required|
|element|HTMLScriptElement \|undefined|The script element (for load/error callbacks) Will be undefined for callback-only scripts|-|Optional|
|error|Error \|undefined|Error information (for error callbacks)|-|Optional|