Softwium SQL Validator
FreeUntestedOur check runs without a key, so we couldn't test this one. It doesn't mean it's down.
Checks MySQL-style SQL query syntax and returns parser errors with line/column locations.
Free tier, in plain English
Free to use with no key; the only documented limit is a request to not overuse it.
Alternatives in Testing
HTTP CatReturns a cat image for any HTTP status code, useful for error pages and status demos.FreehttpbinEchoes back HTTP requests for testing: headers, auth, redirects, status codes, delays, and more.FreeLabelixaRenders ZPL/EPL/TSPL/CPCL thermal labels and barcodes to PNG/PDF, validates ZPL syntax.FreemiumMySQL Visual EXPLAINTurns a MySQL EXPLAIN plan into an interactive, embeddable visual query plan diagram.FreePHPHubChecks PHP code for syntax errors against a chosen PHP version and returns line-numbered results.