About JSON Kit

JSON Kit is a free suite of 40+ JSON tools designed for the way developers actually work in 2026 — moving JSON between LLMs, APIs, no-code platforms, and AI-assisted codebases at a pace that older tools never anticipated.

Why Another JSON Tool?

The generic "JSON formatter" market is dominated by tools built a decade ago. They work, but they weren't designed for a world where your JSON often comes from a language model that added trailing commas, wrapped it in a markdown code block, and hallucinated a field name.

JSON Kit adds what those tools are missing: LLM JSON repair, markdown extraction, OpenAI function schema generation, Supabase schema export, Zod validator generation, and more.

Privacy First

Every tool in JSON Kit runs 100% in your browser. No JSON is sent to our servers. Ever. This is a deliberate design decision — developers paste sensitive API keys, user data, and proprietary schemas into these tools. We don't want that data, and you shouldn't have to trust us with it.

Built With

• Next.js 15 with App Router
• Monaco Editor (VS Code's editor)
• jsonrepair for LLM output fixing
• Cloudflare Pages (edge-deployed, fast globally)

Open Source

The transformation libraries powering JSON Kit are open source. We believe the web is better when core developer utilities are free and auditable.