About JSON Fmt
JSON Fmt is a side project of the same small firm that runs the other ABSU sites. The tools exist because the author kept opening online formatters and then wondering where the pasted payload went. Here the answer is written on every page: nowhere.
The tools use the browser's own facilities (JSON.parse, TextEncoder, atob and btoa, the Web Crypto API) rather than third-party libraries, so what you see is what the browser does.
Who runs it
JSON Fmt is published by ABSU Mobilities, a proprietorship of Sumaiya Fatima in Hyderabad, India. The same publisher runs the other ABSU sites. There is no company behind the name beyond that, and no investors.
How the tools are made
Each tool is a small program that runs in your browser. The formula is written out on the tool's page with a worked example, so you can check it by hand. Where a tool depends on a published rate, slab or table, the page names the source and the date we read it. When a source changes, the page is updated and the date moves.
Mistakes
If a result is wrong, or a source is out of date, write to support@abdulsfresh.in with the tool's name and the inputs you used. Corrections are made on the page, with the date.