pasindu Ishan

A free, privacy-first mock data generator for developers that creates coherent, reproducible datasets. Generate data using a field picker, a pasted JSON sample, or JSON Schema. Emails, locations, and timestamps stay logically consistent. Use a seed for identical output every time. Export unlimited JSON, NDJSON, or CSV. Runs entirely client-side, works offline, and requires no signup.

Free, no-signup HTTP status code quiz for early-career devs and CS students. 10 mixed questions per round, easy to trivia difficulty ramp, streaks, and a shareable rank. Practice 401 vs 403, 404 vs 410, 429 vs 503, and the codes that come up in every interview.

Hey hunters 👋 I'm Pasindu, the maker. Most JSON Schema generators use one sample and assume every field is required and every type fixed — almost never true for real APIs. Paste 2–5 real samples and this merges them: missing fields become optional, mixed types become nullable unions. A schema that matches reality, not one lucky response. 100% client-side, no signup, free. Part of jsondevtools.org. Feedback on the merge logic welcome — what JSON pain should I solve next?