Sites and apps similar to JSONLinter include DevToys, which is free and open source. Other options are JSON Sage, Omni Tools, CodePrettify and DevToys for Mac. There's no shortage of JSON Viewers like JSONLinter, with more than 25 alternatives for Mac, Linux, Windows and self-hosting.
DataLensia is a privacy-first, browser-based data toolkit that lets you visualize CSV datasets and work with JSON/NDJSON using tools like a JSON comparator, schema generator, editor, and converter — all processed locally.
JSON Online Viewer is a fast JSON tree visualizer. It is intended for small-to-medium sized JSON texts which are common in the online usage.
