json-toolkit

Format, minify, validate, and diff JSON in one offline HTML file.- Open in any modern browser. No install, no server, no internet.- Format with 2-space, 4-space, or tab indent.- Minify with size-saving stats.- Validate with line + column error reporting, plus key count and depth.- Diff two JSON objects, with added / removed / changed paths highlighted.Pure vanilla JavaScript. ~280 lines. Zero dependencies. Your data never leaves the page.Works in Chrome 124+, Firefox 125+, Safari 17+, Edge.One-time $5. Yours forever. MIT licensed.

Found on Devadex — the discovery index for independent software the big search engines bury. More from gumroad.

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