I built QueryTuner because the tools that exist for SQL performance are built for DBAs

They cost $400/month, require installing an agent with database credentials, and assume you already know what you're looking for. That leaves nothing for the developer who just needs to understand why their query is slow.

QueryTuner has no database connection, no credentials, no installation. Paste your SQL, select your dialect, get back in under a second:

- Which patterns are causing performance problems and why, in plain English - A rewritten query with the slow parts fixed - The exact index to create for your database (CONCURRENTLY for PostgreSQL, ALTER TABLE for MySQL, NOLOGGING for Oracle, ONLINE=ON for SQL Server) - A shareable report URL

Findings are labeled with three evidence tiers: - Deterministic — always applies regardless of data - Schema-verified — verified against your DDL - Needs runtime evidence — pattern-based, confirm with EXPLAIN before creating

Paste your CREATE TABLE statements alongside the query to get schema-verified recommendations with real table names instead of placeholders.

Supports PostgreSQL, MySQL, Oracle, SQL Server, SQLite.

Source: github.com/AutoShiftOps/querytuner

API: https://api.querytuner.com/docs

Built solo on 30 min/day. Would especially value feedback from Oracle and SQL Server users.