Convert a PDF to grayscale in a vectorized fashion, including images and all content.

Lists annotations in a PDF file.

Adds a text annotation with a user specified string to a fixed location on every page.

Add a rectangle annotation to a specified location on a page.

Add a line with arrowhead between two specified points on a page.

Annotate/mark up pages of a PDF file.

List all content streams for all pages in a pdf file.

Inspect PDF object types. This example shows the capability of assessing the object types in PDF files.

Prints basic PDF info: number of pages and encryption status.

Get specific object from a PDF by number. Prints the trailer dictionary if no number specified.

Detect scanned PDF files by looking through the object types and determining whether it is likely to be a scanned file.

Lists form fields in a PDF file.

Draw a line in a new PDF file.

Insert text to a specific page, location in a PDF file.

Basic example for text searching: Retrieving position of a signature line in PDF where the signature line is given by text. And positioned with a Tm operation above.

PDF to text: Extract all text for each page of a pdf file.

Outputs protection information about locked PDFs.

Unlocks PDF files, tries to decrypt encrypted documents with the given password, if that fails it tries an empty password as best effort.

Protects PDF files by setting a password on it. This example both sets user and opening password and hard-codes the protection bits here, but easily adjusted in the code here although not on the command line.

Check access permissions for a specified PDF

Create a barcode and insert on a specific location in a PDf file

Create a barcode or a QR code and insert on a specific location in a PDf file

Add watermark image to each page of a PDF file

List images in a PDF file. Passes through each page, goes through the content stream and finds instances of both

Add images to a PDF file, one image per page

Extract images from a PDF file. Passes through each page, goes through the content stream and finds instances of both

Adds image to a specific page of a PDF. xPos and yPos define the upper left corner of the image location, and width

Advanced PDF split example: Takes into account optional content - OCProperties (rarely used)

Basic PDF split example: Splitting by page range

Rotate pages in a PDF file. Degrees needs to be a multiple of 90

Prints PDF page info: Mediabox size and other parameters

For a more basic merging of PDF page contents, see pdf_merge.go

Simply loads all pages for each file and writes to the output file.

Demonstrates how to crop the MediaBox of a page in a PDF document using UniPDF.

Demonstrates many of the common components used when creating a PDF report with UniPDF. Great starting point for creating advanced reports.