CodeHS vs SQL Fiddle

CodeHS provides computer science curriculum and classroom tools for K–12 teachers, students and schools. Its catalog includes more than 100 customizable, standards-aligned courses across computer science, cybersecurity, artificial intelligence and digital literacy. The browser-based editor supports more than 10 languages, including Python, Java, JavaScript and C++. Classroom tools include autograders, in-editor help, code history and a blocks-to-text experience. Its learning management system gives teachers visibility into class progress, assignment grading and students' coding process. Listed AI features include hints, grading, Ask AI and Vibe Coding; the free-versus-Pro comparison identifies AI grading and hints as Pro features. The permanent Free teacher plan requires no credit card and has no per-student fees, but includes no downloads. Individual Learner All Access costs $99 a month, billed monthly, or $990 a year, billed annually. CodeHS says it is not an accredited school or online course provider, so Individual Learner students do not receive official grades or academic credit upon completion. Most integrations require a school license.

SQL Fiddle has no write-up on Specifiction yet; its figures are above.