Untitled circuit
Edit name- New
- Upload .qasm file
- Duplicate file
- Share
- Export circuit image
- Save file
- UndoCtrl+Z
- Redo⇧+Ctrl+Z
- CutCtrl+X
- CopyCtrl+C
- PasteCtrl+V
- Select allCtrl+A
- Clear selectionEsc
- Clear circuit
- Manage registers
- Visualizations seed
- Theme
- Default (colored)
- Monochrome
- Panels
- Graphical editor
- Code editor
- Statevector
- Probabilities
- Q-sphere
- Circuit
- Phase disks
- Freeform alignment
- Left alignment
- Layers alignment
- Reset workspace
- Build your first circuit
- Explore features
- Circuit view customization
- Code editor
- File download & upload
- In-context editing & info
- In-context phase disk
- Inspect mode
- Themes & export options
- Documentation
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Build your first quantum circuit
IBM Quantum Composer offers a customizable set of tools to help you build, visualize, and run quantum circuits on real quantum hardware. Your first circuit will be a Bell state – a simple circuit where two qubits become maximally entangled.
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Circuit view customization
- Add or remove qubits and registers by clicking on the circuit wire, or define them using the register settings modal.
- Explore alignment options to control how your circuit is displayed:
- Left alignment (default): Organizes gates in a compact format
- Freeform alignment: Allows gates to be placed anywhere
- Layers alignment: Visualizes the operation order
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Code editor
- Changes to the circuit are automatically synced with the code editor, and vice versa. Edit OpenQASM 2.0 code and see those changes visually.
- View your code in OpenQASM (editable) or Qiskit (read-only).
- Export your code to use in different applications.
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In-context editing & information
- Use the in-line toolbar to take quick actions like Group and Copy.
- Edit gate parameters and view glossary definitions in the in-context panel on the left.
- Expand or collapse gates to see their definitions without ungrouping them.
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File download & upload
- Start fresh with a new file, or upload a .qasm from local storage to pick up where you left off.
- Download your file to save changes once you’re done editing.
- Rename your file before downloading to keep versions organized.
- Duplicate a file into a new tab to explore changes without affecting your original.
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Inspect mode
- Use Inspect mode as a debugging tool to step through your circuit and preview how it would execute on real hardware.
- Watch the visualizations update in real time as you progress through circuit operations with the arrow buttons.
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In-line phase disk
- Drag phase disk visualizations onto your circuit from the catalog to measure the state of each qubit at any point in your circuit.
- Use the info panel to learn more about the phase disk visualization in context, or refer to our documentation to learn more.
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Theme & export options
- Switch between Default and Monochrome themes via View > Theme > Monochrome.
- Customize your circuit diagram export settings, including theme, file format, and wrap.
- Use the preview panel to see how your circuit diagram will appear before exporting.
Options
Operations
This visualization shows the probability of outputs across the computational basis states, for up to 8 qubits.
Reset cameraOptions
The q-sphere (5-qubit limit) provides a global view of a multi-qubit quantum state in the computational basis. Node size is proportional to state probabilities, and color reflects the phase of each basis state.