itsourcecode.com hosts 300+ free UML diagrams for BSIT capstone and final-year projects: ER diagrams, Data Flow Diagrams (DFD), Class Diagrams, Use Case, Activity, Sequence, Component, and Deployment diagrams for common systems like Library Management, Hospital, Hotel, Restaurant, School, ATM, Payroll, E-commerce, and more. Every diagram is downloadable, editable, and free for academic use. Browse by diagram type below, or jump directly to a complete UML set for your specific capstone system.
UML (Unified Modeling Language) diagrams are required documentation for almost every BSIT capstone and thesis defense in 2026. Your panel will ask to see at least four: a use case diagram (what the system does), an ER diagram or class diagram (what data it manages), an activity or sequence diagram (how the workflow runs), and a deployment diagram (how it’s hosted). Submitting a project without these is the single most common reason panels reject documentation on first review.
Start with these four, in this order — they cover ~90% of capstone requirements:
If your defense panel asks for “sequence” or “component” diagrams, you’ll find those below too. Most BSIT programs require 4–8 UML diagrams total per thesis.
Shows who can do what. Required for almost every BSIT capstone.
Shows your database structure. Required before coding starts.
Shows how data moves through your system at Level 0, 1, and 2.
Shows your object-oriented code structure. Includes Java and PHP class examples.
Shows the step-by-step flow of a specific feature or process.
Shows the time-ordered interactions between actors and the system.
Shows the physical structure of your system (servers, libraries, modules).
If you’ve picked your capstone system, jump straight to a complete UML set — each page below contains multiple diagrams (Use Case + DFD + Class + ER + Sequence + Activity) for one system, organized for your defense documentation.
Yes. All UML diagrams on itsourcecode.com are free to download, modify, and submit as part of your capstone or thesis documentation. No attribution required for academic use, though we appreciate a link back when possible.
Most diagrams are provided as PNG/JPG images (viewable in any browser) plus editable source files. For editing, we recommend free tools: draw.io (web-based, no install), StarUML (desktop), or Lucidchart (web). Microsoft Visio also works if your school provides a license.
Yes. All diagrams follow current UML 2.5 notation standards (latest as of 2026). Use case actors use stick figures, class diagrams use proper visibility modifiers (+ public, – private, # protected), and sequence diagrams use standard lifelines and activation bars.
Absolutely. Every diagram is meant as a starting template. Replace entity names, change actor labels, add/remove use cases, modify relationships — they’re yours to adapt. Most BSIT students customize 30–50% of the original before submission.
Many do. UML diagram pages for systems like Library Management, Hotel Management, and ATM include links to the related free PHP, Python, or Java source code on itsourcecode.com. Look for the “Related Projects” section at the bottom of each diagram post.
An ER diagram models the database — tables, columns, and relationships between tables. A class diagram models the code — classes, attributes, methods, and inheritance. ER diagrams come from database design (Chen / Crow’s Foot notation); class diagrams come from UML/object-oriented design. Capstone projects usually need both.
For APA 7th edition (most common in BSIT): itsourcecode.com. (2026). [Diagram title]. Retrieved from [URL]. Example: itsourcecode.com. (2026). DFD for Library Management System. Retrieved from https://itsourcecode.com/uml/dfd-for-library-management-system-data-flow-diagram/.
We add new UML diagrams every week and update existing ones when notation standards change. This page was last refreshed in May 2026. Bookmark and check back monthly — new systems (especially recent capstone trends like IoT, AI-assisted, and mobile-first projects) are added regularly.
This UML diagrams library has been curated since 2015 by PIES Information Technology Solutions, a software services company based in Binalbagan, Negros Occidental, Philippines. The collection is used by 12,000+ BSIT students monthly across the Philippines, India, and the United States for capstone, thesis, and coursework documentation. If you’ve found a specific diagram useful for your defense — or you need a UML diagram for a system we don’t yet cover — leave a comment on the related post or contact us via the site footer.
The Online Hotel Reservation System ER Diagram is the project’s database design that reveals the relationships of the hotel reservation entities. This describes the logical structure of the system’s database …
This article will explain, step by step, how to make the entity relationship diagram (ERD) for the Online Food Ordering System ER Diagram. The Online Food Ordering System capstone project …
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The E-commerce Website ER Diagram site shows how it uses database design to handle data used for e-commerce management tasks (ERD). It shows how the database links the different parts …
The employee attendance management system ER diagram shows the relationships of the system’s entities that build its database design. It is done by identifying the employee attendance management process entities, …
The attendance management system ER diagram reveals the relationships of the system’s entities to create its database design. It is also used to describe the logical structure of the system’s …
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The model of the Pharmacy Management System ER Diagram is shown in this ER (Entity Relationship) Diagram. It shows all of the database tables and the connections between customers, pharmacists, …
The employee management system ER diagram shows the relationships of the system’s entities that build its database design. ER diagram describes the logical structure of the system’s database or data …
This template is an ER diagram for employee payroll management system. It makes it easy for the business to manage the distribution of employees through the management system. As the …