Flutter Upgrade Helper is a web tool that helps Flutter developers understand and apply Flutter SDK upgrades safely by visualizing template-level changes between Flutter versions.
All diffs are generated from the official Flutter template app (counter app) and compared across Flutter SDK versions.
🔗 Live: https://www.flutter-upgrade-helper.site
- Compare any two Flutter SDK versions (1.0.0 → latest, including bugfix releases)
- Visualize changes from the official Flutter counter template app
- Highlight file change types: ADDED, DELETED, RENAMED
- Filter versions to include/exclude bugfix releases
- Prevent invalid version comparisons (base ↔ target awareness)
- Unified diff view
- Split (side-by-side) diff view
- Platform-aware file structure
- Expand / collapse individual files or all files
- Copy full content of a file
Flutter Upgrade Helper does not modify your project automatically.
Instead, it can generate a context-aware upgrade prompt that you can paste into any AI coding tool (ChatGPT, Claude, Cursor, Copilot, IDE agents, etc.).
The generated prompt:
- Uses real Flutter template diffs as ground truth
- Explains important constraints (line numbers, paths, templates vs real projects)
- Helps AI tools apply changes safely and contextually
- Keeps you fully in control of the upgrade
AI is not required — this feature is optional and assistive.
- Flutter developers upgrading existing apps
- Teams maintaining long-lived Flutter projects
- Developers who want clarity before applying SDK changes
- Anyone tired of manually diffing Flutter templates
- Flutter developers upgrading projects with AI coding agents
Albin PK
- GitHub: https://github.com/albinpk
- LinkedIn: https://www.linkedin.com/in/albinpk/
If this tool helps you upgrade Flutter projects more confidently,
please consider giving the repo a ⭐