Edit Scanned PDF with Postman – Step-by-step Guide

  1. Sample Scanned PDF
  2. Open Postman Collection
  3. Fill Parameter Values
  4. PDF.co Call Result
  5. Scanned PDF Output

Step 1: Sample Scanned PDF

In this tutorial, we will show you how you can edit a scanned PDF file using Postman and PDF.co. We will add a company logo, a signature, a clickable website URL and a note in this sample scanned PDF.


Sample Scanned PDF Invoice
Sample Scanned PDF Invoice


Step 2: Open Postman Collection

We assume that you already set up the PDF.co Postman collection. If you haven’t yet, you can check out this step-by-step guide.

Open the PDF.co API v.1.00 collection and click on /pdf/edit/add under the PDF Add Text, Signature and Images to PDF folder. This will open a tab of a template with ready-to-run JSON.

Open The PDF/Edit/Add Endpoint In The Postman Collection

Step 3: Fill Parameter Values

The pdf/edit/add endpoint parameters are already provided for and you can edit the values with your own. Let’s change the name to result, add the scanned PDF file URL, add the text objects in the annotations[] parameter, and the company logo and signature in the images[] parameter. Once all the values are added, click on the Send button so PDF.co can process the request.

Add Name, URL, And Annotations Parameters Values

Add Image Parameter Values
Here’s the cURL code version of the sample above:

curl --location --request POST 'https://api.pdf.co/v1/pdf/edit/add' \
--header 'Content-Type: application/json' \
--header 'x-api-key: YOUR_API_KEY' \
--data-raw '{
    "name": "result",
    "url": "filetoken://b6ae0b074237e56bf2087efe",
    "annotations": [
            "text": "Please call the main office when no one answers the local number",
            "x": 37,
            "y": 260,
            "pages": "0"
            "text": "Sign Here",
            "x": "437",
            "y": "226",
            "pages": "0"
            "text": "https://pdf.co",
            "x": 38,
            "y": 109,
            "size": 12,
            "pages": "0",
            "link": "https://pdf.co",
            "fontName": "Times"
    "images": [
            "url": "https://bytescout-com.s3-us-west-2.amazonaws.com/files/demo-files/cloud-api/pdf-edit/logo.png",
            "x": 431,
            "y": 32,
            "pages": "0"
            "url": "filetoken://ac34b27bd949bd80e746345fb725236337a8c20d243b405a",
            "x": 400,
            "y": 120,
            "width": 180,
            "height": 180,
            "pages": "0"

NOTE: PDF.co has built-in file storage where you can upload files and store files permanently. The files are private and secure. Only you will be allowed to use the private URL to access the file. To learn more, you can check out this guide.

You can use the Make a Signature tool to draw your signature. The signature can be downloaded in PNG or you can use the Datauri as an image URL.

The Simple PDF Viewer is a very handy tool to get an object’s coordinate in a document. You can easily set and get the text and the coordinates of the image here.

Step 4: PDF.co Call Result

Great! PDF.co successfully processed the call. Kindly copy and paste the URL in your browser to see the result. The URL is temporary and will expire after an hour by default. You have the option to increase the output link expiration in the Business plan and higher.

PDF.co Generated Output URL

Step 5: Scanned PDF Output

After we have added the company logo, affixed our signature, added a clickable company link and a note, our scanned PDF now looks like this. The document can be downloaded to your computer and/or printed right there.


Edited Scanned PDF Output
Edited Scanned PDF Output


In this tutorial, you learned how to add regular text, clickable links, company logos, and affix your signature in a scanned PDF file using PDF.co and Postman. You familiarized yourself with the PDF.co free tools to draw your signature and get the object coordinates in a PDF. You also learned about the PDF.co built-in file storage and how to set up the Postman collection.

Edit Scanned PDF with Postman – Video