Free Online Converter for MCA OCT files to PDF

Upload old MCA .OCT files to extract the original PDF eForms for free.

Secured: Files are processed entirely in your browser. No files are uploaded or stored on our server.

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What is a MCA OCT File?

Older filings downloaded from the MCA portal may come in a .OCT format instead of PDF.

These files were used in the earlier filing system of the Ministry of Corporate Affairs to store digitally signed eForms. The OCT file is essentially a container that includes:

• the original PDF eForm
• digital signature information
• submission metadata

Many users download these files while accessing old ROC records but cannot open them directly.

Why MCA Forms Were Stored in OCT Format

Earlier versions of the MCA e-filing system stored forms in a signed container format to maintain document authenticity.

The .OCT file usually contains the original form submitted to MCA such as:

  • Form 20B – Annual Return
  • Form 23AC – Balance Sheet
  • Form 23ACA – Profit & Loss Account
  • Form 66 – Compliance Certificate

To view the actual document, the OCT file must be decoded to extract the embedded PDF.

How to Open an MCA OCT File

You cannot open OCT files directly using standard PDF viewers.

To access the original form, you need to:

  1. Decode the OCT container
  2. Extract the embedded archive
  3. Retrieve the PDF eForm

The converter above performs this process automatically inside your browser.

No file is uploaded to any server, ensuring your documents remain private.

Steps to Convert OCT to PDF

  1. Upload the .OCT file using the tool above
  2. The converter extracts the embedded data
  3. The original PDF form is generated
  4. Preview or download the extracted document

The entire process takes only a few seconds.

Supported MCA Forms

This converter works with most legacy filings downloaded from the MCA portal including:

  • Form 20B
  • Form 23AC
  • Form 23ACA
  • Form 66
  • Other archived eForms

Frequently Asked Questions

Why does MCA provide OCT files instead of PDF?

Older filings were stored in digitally signed containers for security and authenticity.

Is it safe to use this converter?

Yes. The conversion happens entirely within your browser. Your files are never uploaded anywhere.

Can I convert multiple OCT files at once?

Yes. The tool supports bulk conversion of multiple files simultaneously.

Do I need to install any software?

No installation is required. This converter works directly in your browser.