> ## Documentation Index > Fetch the complete documentation index at: https://docs.pdf.co/llms.txt > Use this file to discover all available pages before exploring further. # Compress PDF > This operation allows you to compress/reduce the size of your PDF files while maintaining the quality. Compress Pdf Pn ## Input | Name | Description | Required | | :------------------------------- | :---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | :------- | | PDF URL | Provide the URL to the source PDF document, or a `filetoken://` link from [PDF.co Built-In Files Storage](https://app.pdf.co/tools/files). If you use another cloud service such as **Google Drive** or **Dropbox** ensure the link is publicly accessible. | Yes | | File Name | File name for the generated output, the input must be in string format. | No | | Webhook URL | The callback URL or Webhook used to receive the output data. | No | | Password | The password of the password-protected PDF file | No | | HTTP Username | HTTP auth user name if required to access source URL. | No | | HTTP Password | HTTP auth password if required to access source URL. | No | | Custom Compression Configuration | [**Configuration options**](https://docs.pdf.co/api-reference/pdf-compress#config). By default this object is pre-defined to give typical options for optimization. | No | ## Custom Compression Configuration The `config` object defines granular settings for the compression process. By default, this `config` object is set to match the standard configuration for image optimization by Adobe Acrobat Pro and is defined as follows: ```json theme={null} { "images": { "color": { "skip": false, "downsample": { "skip": false, "downsample_ppi": 150, "threshold_ppi": 225 }, "compression": { "skip": false, "compression_format": "jpeg", "compression_params": { "quality": 60 } } }, "grayscale": { "skip": false, "downsample": { "skip": false, "downsample_ppi": 150, "threshold_ppi": 225 }, "compression": { "skip": false, "compression_format": "jpeg", "compression_params": { "quality": 60 } } }, "monochrome": { "skip": false, "downsample": { "skip": false, "downsample_ppi": 300, "threshold_ppi": 450 }, "compression": { "skip": false, "compression_format": "ccitt_g4", "compression_params": {} } } }, "save": { "garbage": 4 } } ``` Refer to this [guide for more details](https://docs.pdf.co/api-reference/pdf-compress#config) on the config object. ## Output | Name | Description | | :-------------------- | :------------------------------------------------------------------------------------------------------------------------------- | | `jobId` | Unique identifier for the background job. | | `pageCount` | Number of pages in the PDF document. | | `error` | Indicates whether an error occurred (`false` means success) | | `status` | Status code of the request (200, 404, 500, etc.). For more information, see [**Response Codes**](/api-reference/response-codes). | | `credits` | Number of credits consumed by the request | | `remainingCredits` | Number of credits remaining in the account | | `duration` | Time taken for the operation in milliseconds | | `url` | Direct URL to the final PDF file stored in S3. | | `name` | Name of the output file | | `outputLinkValidTill` | Timestamp indicating when the output link will expire |