Paste one or more SQL INSERT statements — including multi-row INSERT INTO t (col1, col2) VALUES (1, 'a'), (2, 'b') — and get back a JSON array of objects keyed by the column names. String literals are unquoted, NULL becomes null, TRUE/FALSE become booleans and numeric literals become numbers. If no explicit column list is given, columns are named col1, col2 and so on.
Paste a CREATE TABLE statement instead and the tool returns a JSON description of the schema: table name plus each column's name, type and NOT NULL / PRIMARY KEY flags. Everything runs locally in your browser using a lightweight built-in SQL tokenizer — no server, no upload — so it is safe for schemas and data dumps you would rather not paste elsewhere.