---
title: id
slug: Web/Manifest/id
browser-compat: html.manifest.id
---

{{QuickLinksWithSubpages("/en-US/docs/Web/Manifest")}}

<table class="properties">
  <tbody>
    <tr>
      <th scope="row">Type</th>
      <td><code>String</code></td>
    </tr>
    <tr>
      <th scope="row">Mandatory</th>
      <td>No</td>
    </tr>
  </tbody>
</table>

The `id` member is a string that represents the _identity of the web application_ — the unique identifier for the web application. If the web application ID does not match an existing ID, the application will be treated as a unique identity even if it is from the same URL.

> **Note:** The `id` member can be used to uniquely identify applications. The `id` member is processed like a `start_url` but can be out of [scope](/en-US/docs/Web/Manifest/scope) because it does not point to a resource that can be navigated to.

## Examples

```json
"id": "?homescreen=1"
```

## Specifications

{{Specifications}}

## Browser compatibility

{{Compat}}


Collaborative Calculation and Data Science

colby

sagemath

Examples

Specifications

Browser compatibility

Product

Resources

Company

Type	`String`
Mandatory	No