# Packet Tracer .pkt/.pka: reconstructing the lab file format

> The Packet Tracer .pkt/.pka project reconstructs Cisco Packet Tracer's encrypted lab-file containers and their XML payloads. Its Python codec and CLI decode, re-encode, inspect, diff and export files, while a builder generates lab topologies and scored activities using documented cipher, compression and schema details.

- Type: Case study
- Targets: App
- Category: Independent reconstruction cases
- Relationship: Independent reconstruction project
- Sources reviewed: 2026-11-06
- Added to the catalog: 2026-11-08
- Original resource: <https://github.com/aacanadaa/packet-tracer-pkt-format>
- Primary source: <https://github.com/aacanadaa/packet-tracer-pkt-format/blob/abab1b12398382cd374e91dd542a783c7630ee10/README.md>
- Catalog page: <https://awesomerea.org/resources/packet-tracer-pkt-format-case/>
- Record JSON: <https://awesomerea.org/resources/packet-tracer-pkt-format-case/record.json>
- Chinese version: [简体中文](https://awesomerea.org/zh/resources/packet-tracer-pkt-format-case/index.md)

## Requirements & limits

- **Prerequisites:** Python 3.10+ is required; inspecting a file requires an existing .pkt or .pka, and Packet Tracer is needed to open generated results.
- **Scope:** The author reports coverage of two container families spanning Packet Tracer 4.1 through 9.0.1.
- **License:** GPL-3.0 license.

## Primary sources

1. <https://github.com/aacanadaa/packet-tracer-pkt-format/blob/abab1b12398382cd374e91dd542a783c7630ee10/README.md>

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## About this entry

The description was reviewed against primary sources.
Original editorial content: MIT. Linked projects, papers and assets retain their own rights and licenses.