Optimizer Options

This guide will show you how to optimize a PDF document by using various options provided by UniPDF.

Before you begin #

You should get your API key from your UniCloud account.

If this is your first time using UniPDF SDK, follow this guide to set up a local development environment.

Clone the project repository #

In your terminal, clone the examples repository. It contains the Go code we will be using for this guide.

git clone https://github.com/unidoc/unipdf-examples.git

Navigate to the compress folder in the unipdf-examples directory.

cd unipdf-examples/compress

How it works #

Lines 9-18 import the UniPDF packages and other required dependencies.

The init function in lines 20-27 authenticates your request with your UNIDOC_LICENSE_API_KEY.

The main function in lines 32-89 is just like any other function when we want to create a regular PDF file, one difference would be on line 66-74 where we use various options available to help reduce PDF document size.

Run the code #

Run this command to add a line annotation to the specified page in a PDF. This will also get all the required dependencies to run the program.

go run pdf_optimize.go input.pdf output.pdf

Sample output #

Running the code example will show you some info on how much compression is made, similar like the following.

Original file: input.pdf
Original size: 266845 bytes
Optimized file: output.pdf
Optimized size: 207347 bytes
Compression ratio: 22.30%
Processing time: 53.17 ms