> For the complete documentation index, see [llms.txt](https://mostafaznv.gitbook.io/pdf-optimizer/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://mostafaznv.gitbook.io/pdf-optimizer/advanced-usage/ghostscript-binary-configuration.md).

# Ghostscript Binary Configuration

Customize the Ghostscript binary path used by pdf-optimizer to match your environment. This option provides flexibility in specifying the exact location of the Ghostscript binary on your server.

{% tabs %}
{% tab title="Standalone PHP" %}
You can specify the exact path to the Ghostscript binary file by passing it to the <mark style="color:red;">`init`</mark> method of the `PdfOptimizer` class.

```php
use Mostafaznv\PdfOptimizer\PdfOptimizer;

PdfOptimizer::init('/path/to/gs')->optimize('input.pdf', 'output.pdf');
```

{% endtab %}

{% tab title="Laravel" %}
You can specify the exact path to the Ghostscript binary file using the <mark style="color:red;">`setGsBinary`</mark> method of the `PdfOptimizer` class.

```php
use Mostafaznv\PdfOptimizer\Laravel\Facade\PdfOptimizer;

PdfOptimizer::fromDisk('files')
    ->open('input-1.pdf')
    ->setGsBinary('/usr/local/bin/gs')
    ->toDisk('s3')
    ->optimize('output-1.pdf');
```

**Note:** The `setGsBinary` method must be called after the `fromDisk` and `open` methods. This option is specifically available during the exporting phase of the optimization process.
{% endtab %}
{% endtabs %}


---

# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter:

```
GET https://mostafaznv.gitbook.io/pdf-optimizer/advanced-usage/ghostscript-binary-configuration.md?ask=<question>&goal=<endgoal>
```

`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal.

The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.