Flatten Transparencies

Flatten Transparencies

Flatten Transparencies is a REST API tool that renders and replaces all transparent objects in the PDF with opaque colors to increase RIP speed in a prepress workflow and support conversion to other file formats.

Why use our version of Flatten Transparencies?

Unrivaled Color Management
  • pdfRest uses Adobe® PDF rendering and color engine technology to maintain precise color accuracy.
  • Trust only the best color management technology to preserve true colors through the transparency flattening process.
Maximum Compatibility
While transparent objects in PDF documents are supported generally by the PDF ISO 32000 specifications, transparencies are not universally compatible with every PDF conformance version, tool, process, and workflow.

When compatibility is key, pdfRest’s Flatten Transparencies reliably removes all transparent objects in a PDF to ensure smooth integration with downstream operations.
Print with Confidence
pdfRest is built with tried-and-true Adobe® technology that has supported enterprise print operations for decades. Flattening transparencies with pdfRest reliably optimized PDF documents for efficient, fast printing.

Start from Code Examples

  1. First, you'll need an API Key - visit Get Started to:
    • Stay anonymous with a Guest API Key for 50 free API Calls
    • Sign up for an upgraded API Key with unlimited, continuous service
  2. Choose your programming language
  3. Copy and paste the code to your project
  4. Update Api-Key field with your unique API Key
  5. Update file with the local path to your input
  6. Run this code to send an API Call
See more code examples in our
GitHub repository
Try pdfRest with just a few clicks
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curl -X POST "https://api.pdfrest.com/flattened-transparencies-pdf"
  -H "accept: application/json" 
  -H "Content-Type: multipart/form-data" 
  -H "Api-Key: xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx" 
  -F "file=@PATH_TO_FILE/example_file.pdf" 
  -F "output=example_output"

Customize Your Solution


The file parameter allows you to select a local file to be uploaded to pdfRest’s processing server.
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