About JSON Prism

JSON Prism is a free, open-source JSON workspace that runs entirely in your browser. It combines 19 purpose-built JSON tools in a single interface — no installation required, no sign-up, no data uploaded to a server.

JSON Prism covers every common JSON task a developer encounters:

Formatting and validation — The JSON Formatter beautifies minified payloads into readable, indented output. The JSON Validator checks syntax and pinpoints errors with inline highlighting. Both run automatically as you type.

Comparison — The JSON Diff Viewer compares two documents structurally, not line-by-line. Reformatting or key reordering does not show as a difference — only actual data changes are highlighted.

Navigation — JSON Tree View renders any document as a collapsible hierarchy. JSON Flow View renders it as a node-graph diagram, making relationships between nested objects visible at a glance. JSON Visual Editor lets you modify values, add keys, and restructure documents through a form-like interface without editing raw text.

Conversion — JSON Converter transforms JSON to and from CSV, XML, and YAML. JSON Trimmer minifies payloads and removes specific keys or null fields. JSON Minimal Mode filters to only the paths you need.

Debugging — JSON Debugger goes beyond the validator to explain errors in plain language and auto-correct common mistakes like trailing commas and single-quoted strings. AI JSON Cleaner extracts valid JSON from LLM output wrapped in prose, markdown fences, or partial formatting.

Analysis — JSON Structure Analyzer reports nesting depth, key count, type distribution, and array consistency. JSON Best Practices Checker flags naming inconsistencies, excessive nesting, and mixed types. JSON Token Estimator counts tokens for OpenAI, Anthropic, and other LLM APIs.

Collaboration — JSON Share Links encodes your JSON in the URL fragment (no server involved) or creates a short link stored in Cloudflare KV for 30 days. JSON Notes lets you attach plain-text annotations to specific keys or values. JSON Bundle Viewer loads multiple JSON files at once for side-by-side review.

Learning — The JSON Tutorial section covers 18 topics from beginner to advanced, including data types, syntax rules, JSON Schema, JSONPath, REST APIs, security, and large-file performance.

All processing happens locally in your browser. JSON data is never sent to a server unless you explicitly create a share link. The short link feature stores JSON in Cloudflare Workers KV for 30 days — this is entirely opt-in. Analytics are collected via Google Tag Manager in aggregate, with no individual tracking.

JSON Prism is a static-export Next.js application. Every page is pre-rendered at build time and served as static HTML. The interactive workspace is a client-side React application that uses Monaco Editor. There is no backend, no database, and no authentication.

The site is open source. Content is managed through markdown files in the repository, making it easy to update tool descriptions, learn articles, and FAQs without rebuilding the application logic.