Paste a snippet from an old .NET Framework codebase. Get an honest risk read on moving it to modern .NET — with the specific blockers named, not just a vague "it depends."
No API key, no signup on this site — it uses your normal Claude.ai usage. Opens on claude.ai.
No key stored yet. Get one at platform.claude.com — the check calls the API directly from your browser with your key, so you pay for your own usage (typically a fraction of a cent per check). The key is saved only in this browser's local storage; this site has no server and never sees it.