Processing PowerPoint (PPT/PPTX) Files

Limina supports scanning Microsoft PowerPoint PPT and PPTX files for PII and creating de-identified or redacted copies. Limina’s supported entity types function across each file type, with localized variants of different PII (Personally Identifiable Information) entities, PHI (Protected Health Information) entities, and PCI (Payment Card Industry) entities being detected. Our Supported Languages and Supported Entity Types page provides a more detailed look.

If you’d like to try it yourself, please sign up for an account to get a free API key.

How PPTX Files Are Processed

PPTX files are processed by extracting each element and processing according to the table below. The de-identified or redacted file is created by according to the behaviour specified in the table.

Property Type	Details	Behaviour
Core properties	Author, Category, Comments, Content Status, Identifier, Keywords, Language, Last Modified By, Subject, Title, Version	Redact
Speaker notes	Any content in the speakers notes	Redact
Tables	Table objects with text and images	Redact
Images	The Images page provides a more detailed look at Image processing	Redact, unsupported image types are removed
Text boxes	Main slide content	Redact
Embedded links	Hyperlinks to internet pages or documents	Remove
External elements	Tables and charts embedded from another document or file, such as an Excel chart	Remove external file, redact cached values
Embedded audio & video	Videos and audio clips	Remove
Review comments	Comments from document reviews	Redact
Shape objects	Shapes containing text	Redact

You can configure the OCR System by setting it as an Environment Variable or sending it in the request object. Check out our OCR Guide to further understand the OCR modes and their usage.

How PPT Files Are Processed

PPT files are processed by converting into PPTX files, followed the process described above and then converting back to PPT files.

Constraints

If a piece of PII text has more than one style (different fonts, font sizes, underline etc.), the redaction marker will use the first style.
Charts in PPTX files will have all of their numerical data set to 0.
We recommend using Microsoft PowerPoint to open the processed PPT/PPTX files. Other editors may not give ideal results.

Support Matrix

	CPU Container	GPU Container	Community API	Professional API
Supported	Yes	Yes	Up to 10 MiB	No

Sample Request

Connect with one of our privacy experts to run this code.

{
  "file": {
    "data": "<file_content_base64>",
    "content_type": "application/vnd.openxmlformats-officedocument.presentationml.presentation"
  },
  "entity_detection": {
    "return_entity": true
  }
}

echo '{
          "file": {"data": "'$(base64 -w 0 sample.pptx)'", 
          "content_type": "application/vnd.openxmlformats-officedocument.presentationml.presentation"}, 
          "entity_detection": {"return_entity": "True"}
      }' \
| curl --request POST --url 'https://api.getlimina.ai/community/v4/process/files/base64' \
       -H 'Content-Type: application/json' \
       -H 'x-api-key: <YOUR KEY HERE>' \
       -d @- \
       | jq -r .processed_file \
       | base64 -d > 'sample.redacted.pptx'

import requests
import base64

file_url = "https://paidocumentation.blob.core.windows.net/$web/sample.pptx"
filename_out = "/path/to/output/sample.redacted.pptx"
file_content = requests.get(file_url).content
file_content_base64 = base64.b64encode(file_content).decode()

url = "https://api.getlimina.ai/community/v4/process/files/base64"

headers = {"Content-Type": "application/json", "x-api-key": "<INSERT API KEY>"}

payload = {
  "file":{
    "data": file_content_base64,
    "content_type": "application/vnd.openxmlformats-officedocument.presentationml.presentation",
  },
  "entity_detection": {
    "return_entity": True
  }
}

response = requests.post(url, json=payload, headers=headers)
with open(filename_out, "wb") as f:
    f.write(base64.b64decode(response.json()["processed_file"]))

from privateai_client import PAIClient
from privateai_client.objects import request_objects
import base64

filename_in = "sample.pptx"
filename_out = "sample.redacted.pptx"

file_type= "application/vnd.openxmlformats-officedocument.presentationml.presentation"
client = PAIClient(url="https://api.getlimina.ai/community/v4/", api_key="<YOUR API KEY>")

with open(filename_in, "rb") as b64_file:
    file_data = base64.b64encode(b64_file.read())
    file_data = file_data.decode("ascii")

file_obj = request_objects.file_obj(data=file_data, content_type=file_type)
request_obj = request_objects.file_base64_obj(file=file_obj)
resp = client.process_files_base64(request_object=request_obj)

with open(filename_out, 'wb') as redacted_file:
    processed_file = resp.processed_file.encode("ascii")
    processed_file = base64.b64decode(processed_file, validate=True)
    redacted_file.write(processed_file)

Sample Response

Response

{
  "processed_file": "Base64 Encoded File Content of the Redacted File",
  "processed_text": "string",
  "entities": "List[Entity]",
  "entities_present": true,
  "languages_detected": {"lang_1": 0.67, "lang_2": 0.74}
}

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Processing PowerPoint (PPT/PPTX) Files

How PPTX Files Are Processed

How PPT Files Are Processed

Constraints

Support Matrix

Sample Request

Sample Response

​How PPTX Files Are Processed

​How PPT Files Are Processed

​Constraints

​Support Matrix

​Sample Request

​Sample Response

How PPTX Files Are Processed

How PPT Files Are Processed

Constraints

Support Matrix

Sample Request

Sample Response