Tiny Algorithm: Flowchart Editor
Draw algorithms as flowcharts right in the Moodle text editor, run them step by step and turn them into code.
Live demo: try the plugin on algorithm.tsp.edu.rs. Log in as a guest, or use the demo accounts teacher and student (password Demo-2026). Everything is reset every night.
What's New in v2.1.0
- Arrows: every connection that enters a block, goes back to the condition of a loop or joins another line ends in an arrow, so the direction of the flow is always clear.
- The branch taken is marked: during Run and Step, the T or F branch of every If, While, For and Do...While is coloured as the algorithm takes it, in the editor, in pages with filter_algorithm and in quiz questions.
- Save as SVG or PNG: download the whole diagram as a picture for handouts, tests on paper and slides.
- Names as declared in the code: a variable declared as Suma is written Suma everywhere in the generated code, also where the diagram says suma, so the code compiles in every language.
Core features
- Visual editor: Declare, Assign, Input, Output, If, For, While, Do...While, Call, Return, Comment; several functions, undo / redo.
- Drag, copy and paste: drag a block onto a + sign with the mouse or a finger; Ctrl + C, X, V and D copy, cut, paste and duplicate blocks, also between diagrams.
- Arrays and matrices: m[i, j] in the interpreter, the variable watch and the code in all seven languages.
- Interpreter: Run / Step / Stop, console with input, variable watch, infinite-loop guard and clear error messages.
- Flowgorithm files: import and export real
.fprg files.
- Code generation: Python, C, C++, Java, C#, JavaScript and Pascal.
- Editable images: the diagram is an SVG image that keeps its model; double-click to edit again. Zoom and per-diagram options included.
- Students edit and test: with filter_algorithm, students can change their own copy of a diagram in any content and run the teacher's tests.
- Tests from the solution: the teacher enters only the inputs; the expected outputs are computed from the teacher's solution. A test can also call one function and check the value it returns.
The algorithm plugins
Requirements
- Moodle: 4.5 LTS to 5.3 (PHP as required by your Moodle version).
- Companion plugins (optional): filter_algorithm 2.0.0 (Run / Step and the student features for readers) and qtype_algorithm 2.0.0 (quiz question type with automatic grading).
Privacy
The editor and interpreter run in the browser; nothing is sent to external services. The diagram is stored in the text you save. The plugin keeps two display preferences (code and variable panels) and the student's own copy of an editable diagram in the browser's local storage and implements the Moodle Privacy API (no personal data stored).
Developed by Boban Blagojević. Languages: English and Serbian (Latin and Cyrillic).
Source, documentation and issue tracker:
github.com/blagojevicboban/moodle-tiny_algorithm
Licensed under the GNU GPL v3 or later.
