gron vs jsonfmt.dev

gron is a free, open-source command-line utility that turns JSON into separate assignments with visible paths. This representation helps users grep values in large or deeply nested JSON, including responses from poorly documented APIs. Input can come from a file, URL, or standard input. The --ungron option converts assignments back into JSON, while --json emits a JSON stream. Other options provide value-only output, colored or monochrome display, line-by-line streaming, insecure certificate handling, and sorting control. The output is valid JavaScript, and the project demonstrates comparing JSON files by diffing their gron output. If array entries are missing, ungron inserts null values to preserve keys. gron has no runtime dependencies. Installation instructions cover binary downloads, Homebrew, and Go install. It runs on Linux, macOS, and Windows; plan information also lists FreeBSD binaries. The repository uses the MIT license.

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.