BracketView vs JSON OS

BracketView is a JSON workspace for viewing, formatting, validating, querying, and comparing JSON in a browser or desktop app. It provides text, tree, graph, node-card, and nested-table views, as well as Stats and JQ tools. Users can query JSON with JSONPath expressions or jq running in the browser through WebAssembly. Validation supports OpenAPI definitions and custom JSON Schema rules, and the workspace can generate types for TypeScript, Python, Go, Rust, and more. Webhook Tester captures requests from services such as Stripe, GitHub, and Shopify. Core formatting, validation, comparison, and visualization run in the browser; optional AI, snapshots, and webhook capture may send or store data on BracketView servers. AI features may send JSON or an excerpt to Groq and/or Google Gemini through those servers. The desktop app runs core tools offline and opens local files up to 200 MB. Web uploads are limited to 5 MB on Free and 50 MB on Pro. The Free plan is $0 forever; paid plans start at $2.25/mo (annual).

JSON OS is a free, browser-based workbench that pairs a JSON editor with Markdown Studio, a Markdown previewer. The maker says it needs no signup and that processing runs locally in a Web Worker, with data stored in IndexedDB and nothing leaving the device. The JSON workspace supports up to three panes and can open or accept dropped files. Data can be viewed and edited as a tree, text or table, with table columns switched independently. The editor formats, beautifies, minifies and sorts JSON keys, validates against JSON Schema with Ajv format checks, and repairs malformed input such as smart quotes, comments and unclosed brackets. It compares two documents side by side and supports MongoDB-style filters; JSON arrays can be exported to CSV with a UTF-8 BOM. Markdown Studio supports GitHub-Flavored Markdown, Mermaid, KaTeX, highlighted code and embeds from services including YouTube, Vimeo and GitHub Gist. It sanitizes rendered HTML through DOMPurify, stripping scripts and untrusted iframes. Markdown can be exported as source, copied as rendered HTML or downloaded as standalone HTML.