> ## 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.
# Barcode Reader
> Decode barcodes from images or PDF documents quickly and accurately.
## 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 |
| **Barcode Type** | Choose the type of barcode to read. By default, the system will look for QR Codes. | Yes |
| **Pages** | Specify page indices as comma-separated values or ranges to process (e.g. “`0, 1, 2-`” or “`1, 2, 3-7`”). The first-page index is `0`. Use ”`!`” before a number for inverted page numbers (e.g. “`!0`” for the last page). If not specified, the default configuration processes all pages. The input must be in string format. | No |
| **File Name** | File name for the generated output, the input must be in string format. | No |
| **Optical Marks Reader** | Comma-separated list of additional marks to detect. The barcode reader engine can also find marks like **Checkbox**, **UnderlinedField**, etc. on scanned documents. | No |
| **Webhook URL** | The callback URL or Webhook used to receive the output data. | No |
| **Output Links Expiration (In Minutes)** | Set the expiration time for the output link in minutes. After this specified duration, any generated output file(s) will be automatically deleted from [**PDF.co Temporary Files Storage**](/api-reference/file-upload/overview). The maximum duration for link expiration varies based on your current subscription plan. To store permanent input files (e.g. re-usable images, pdf templates, documents) consider using [**PDF.co Built-In Files Storage**](https://app.pdf.co/tools/files). | 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 Profiles** | Use JSON to customize PDF processing with options like output resolution, OCR settings, text extraction methods, encryption, and image handling. Check our [Custom Profile](#custom-profiles) section to see all available parameters for your current endpoint. | No |
## Custom Profiles
You can set additional options for the operation used in the PDF.co node by using **Custom Profiles**. A custom profile is a string in **JSON-like format** containing predefined parameters.
Here’s an example of a Custom Profiles input:
```
{
'DataEncryptionAlgorithm': 'AES128',
'DataEncryptionKey': 'HelloThisKey1234',
'DataEncryptionIV': 'TreloThisKey1234'
}
```
With this input, the PDF.co operation will encrypt the output with strong `AES128` encryption. You can find the list of available parameters for customizing profiles in the PDF.co operation documentation below:
You can use any regular API parameter from the [API Reference](/api-reference) within n8n using the `std_params` feature in profiles. The `std_params` enables the definition of regular API parameters in a JSON format, See [Standard Parameters](/api-reference/profiles#standard-parameters) for detailed documentation and examples.
| Parameter | Type | Default | Description |
| :------------------------ | :----- | :------ | :---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| `DataEncryptionAlgorithm` | string | - | Controls the encryption algorithm used for data encryption. See [**User-Controlled Encryption**](/knowledgebase/user-controlled-encryption) for more information. The available algorithms are: `AES128`, `AES192`, `AES256`. |
| `DataEncryptionKey` | string | - | Controls the encryption key used for data encryption. See [**User-Controlled Encryption**](/knowledgebase/user-controlled-encryption) for more information. |
| `DataEncryptionIV` | string | - | Controls the encryption IV used for data encryption. See [**User-Controlled Encryption**](/knowledgebase/user-controlled-encryption) for more information. |
| `DataDecryptionAlgorithm` | string | - | Controls the decryption algorithm used for data decryption. See [**User-Controlled Encryption**](/knowledgebase/user-controlled-encryption) for more information. The available algorithms are: `AES128`, `AES192`, `AES256`. |
| `DataDecryptionKey` | string | - | Controls the decryption key used for data decryption. See [**User-Controlled Encryption**](/knowledgebase/user-controlled-encryption) for more information. |
| `DataDecryptionIV` | string | - | Controls the decryption IV used for data decryption. See [**User-Controlled Encryption**](/knowledgebase/user-controlled-encryption) for more information. |
## 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**](https://docs.pdf.co/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 |