JDoodle
JDoodle is the workhorse of this category — 110+ languages, no install, works on a school network — and its real business is the compiler API that course platforms embed to grade and run student code. That gives it a durability most browser IDEs lack. The AI framing is newer and thinner than the compiler itself, and none of the paid tiers publish a readable price.
Pros
- More than 110 languages runnable in the browser with no signup for the basic compiler
- A documented compiler API that other platforms embed for code execution
- iOS and Android apps let you save, run and share projects from a phone
- Backed by Main Sequence and used by 10,000+ education institutions, per the vendor
Cons
- The pricing page is client-rendered and shows nothing to a plain request, so plans cannot be compared before signing in
- The AI assistance is a recent addition and much less documented than the compiler
- It is a scratchpad — no real project structure, dependency management or version control
- Execution limits on the free tier are not published on the marketing site