JSON Kit is a set of fast, browser-side JSON tools built for the AI era. The standout is Fix LLM JSON: paste the broken JSON that ChatGPT, Claude, or local models hand you, and get clean, valid JSON back instantly, with a label for exactly what was wrong (trailing commas, single quotes, Python literals, markdown fences, truncated output, and more). Everything runs 100% in your browser, so your output never touches a server.
