LVGL Builder

A web-based LVGL builder that converts GUI designs into LVGL-compatible C code and widget trees, accelerating embedded UI development for microcontrollers.

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About This Tool

The LVGL Builder translates a GUI model into LVGL-ready C code and a corresponding widget tree. It accepts display dimensions, color depth, fonts, and a hierarchical set of widgets with properties such as type, size, position, and styles. The result is a complete C source and header scaffold that can be dropped into an LVGL project. Conceptually, the tool separates design from implementation by representing UI elements as a tree, then emits code that recreates the tree on the target display. This enables reproducible interfaces across devices and enables quick iteration. Benefits include faster prototyping, consistent styling, and reduced boilerplate work for embedded UI teams. Use cases range from prototype demonstrations and design reviews to production-ready UI modules for microcontrollers using LVGL. Unique value stems from LVGL-version-aware code generation, integrated font and asset handling, and exportable design metadata that supports future refactors and multi-device deployment.

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How to Use

Provide inputs: display size, color depth, fonts, and a widget tree with properties.
Define widget hierarchy: assign types, positions, sizes, and styles for each node.
Generate LVGL code: trigger code export to C source and header templates.
Review outputs: inspect the generated files and optional JSON design export.
Integrate into project: include in the LVGL build, link assets, and test on simulator or hardware.

Frequently Asked Questions

Find Quick Answers

What formats are generated?

The tool outputs LVGL-compatible C source code and a header file that recreate the widget tree. It can also export a JSON design snapshot for version control and collaboration.

What inputs are required?

Required inputs include display width and height, color depth, font selections, and a structured widget tree with types, coordinates, and sizes. Optional assets and themes can be added to enrich the output.

Does the tool validate LVGL version compatibility?

Yes. The generator applies API usage compatible with the selected LVGL version (e.g., 8.x vs 9.x) and flags features that require a newer API or a workaround.

Can I export for multiple targets?

The primary export is LVGL C code for a single target. The design export can be reused to generate additional target-specific configurations or be re-imported into separate projects.

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