Dadroit JSON Viewer vs jsonfmt.dev

Dadroit JSON Viewer displays JSON in a tree so users can browse and query structured data, including large files. The desktop viewer supports text and RegEx search with highlighted results and navigation, and it can read JSON-Lines and ndjson logs. Users can load JSON responses from a URL, authenticate when needed, combine multiple files into one searchable dataset, and export a selected node or the full dataset to CSV or XML. The viewer can monitor files and refresh the view automatically when they change. Desktop downloads are listed for Windows 64-bit, macOS, and Linux 64-bit; V Web runs in a browser. Dadroit says V Web processes JSON locally without sending or storing files, responses, or tokens on its servers. The Non-Commercial plan is free for personal, educational, and open-source use, with files up to 50 MB. Standard costs $98 a year, supports commercial use, and allows files up to 2 GB. Advanced costs $198 a year, supports files up to 1 TB, and includes file union. A free trial is not offered.

jsonfmt.dev is a web-based JSON formatter, beautifier and validator, with an HTTPS API for JSON processing. The formatter offers 2-space, 4-space or tab indentation, optional key sorting and depth control. It validates JSON against RFC 8259 and reports line and column errors. Other tools can repair common malformed JSON, compare two documents and convert formats including YAML, CSV, XML, TypeScript, SQL, GraphQL and Protobuf. The toolkit also includes a JWT decoder, JSON Schema validator, JSONPath evaluator and JSONL tools. The maker says the core browser tool handles JSON locally without sending its contents to the server, and continues to work offline after loading; it can also be installed as a Progressive Web App. API options include anonymous access limited to 10 requests per minute, a free API key tier with 100 requests per minute and 1,000 per month, and Pro API at $9, paid once for 1,000 requests per minute and 50,000 per month. Share links encode JSON in the URL fragment, and anyone with the link can access its contents.