Free developer tools
Tools that don't just give you an answer — they explain it, and link the tutorial behind every rule. Free, no signup, and every paste-in tool has an open API you can script against.
Database schema reviewer
A free design review for your CREATE TABLE scripts — missing keys, unindexed foreign keys, type smells, each finding explained.EXPLAIN plan explainer
Paste EXPLAIN ANALYZE output, get a plain-English story of what your query did — and what's worth fixing.SQL → LINQ converter
Common SELECT queries become clean method-syntax LINQ, with every mapping explained — and honest flags for the rest.Migration assessment report
Paste your whole SQL Server script — get an honest effort report: what ports mechanically, what needs a person, and where to start.JSON → C# records
Paste an API response, get C# 12 records with init-only properties, nullable types and JsonPropertyName — every choice explained, every guess flagged.EF Core migration SQL explainer
Paste the script from dotnet ef migrations script — get a plain-English summary of every change, and a warning for each one that can lose data or lock a table.Connection string checker
Paste a connection string — get the provider, every key explained, the password masked, and the production risks flagged. Nothing is stored.Cron expression explainer
Paste a cron expression — read it in plain English and see the next five runs. Linux, Hangfire and Quartz forms, with the classic traps called out.Blazor render mode chooser
Six questions about your app, one recommendation between static SSR, Server, WebAssembly and Hybrid — every reason shown, shareable by URL.Want another one?
An index advisor, a regex explainer for .NET, a NuGet dependency untangler — the workbench has room. Tell us what would save you an afternoon.