Building real things, in public
Notes from DEMHA FUTURE — how we build apps fast with AI, and what we learn.
JSONPath Tester — free online tool
Test a JSONPath expression against your JSON and see what it matches, free and online, right in your browser with nothing uploaded.
JSON Schema Generator — free online
Paste sample JSON and get a matching JSON Schema in seconds, right in your browser. Free and online, nothing is uploaded.
JSON String Escape — free online tool
Turn any text into a valid JSON string, or unescape one back to plain text — free and online, right in your browser, nothing uploaded.
JSON to Code — free online converter
Turn any JSON into Go structs, Python and TypeScript types free and online, right in your browser, with nothing uploaded.
JSON to CSV Converter — free online
Turn a JSON array into a clean CSV file online and free, right in your browser, with nothing uploaded anywhere.
JSON to SQL converter — free online
Turn a JSON array into CREATE TABLE and INSERT statements free and online, right in your browser, with nothing uploaded.
JSON to TypeScript — free online tool
Paste JSON and get matching TypeScript interfaces in seconds, free and online — right in your browser, with nothing uploaded.
JSON Validator — free online checker
Check if your JSON is valid online and free, right in your browser. See the exact line, column and a plain hint for any error. Nothing uploaded.
JWT Decoder — free online tool
Decode a JWT to read its header, payload and expiry, free and online, right in your browser with nothing uploaded.
JWT Generator — free online tool
Build and sign a JWT, or paste a token to decode it — free and online, right in your browser with nothing uploaded.
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