DAP Foundry

Small tools that finish the job in your browser. No account. Your inputs are not uploaded or stored.

• Flatten nested JSON to CSV

  Turn a pasted nested JSON object into a flat CSV table in the browser.

• Convert Unix timestamp to date

  Paste one or more Unix timestamps and get each one as a UTC date in ISO 8601.

• Count line frequency in text

  Count how many times each distinct line appears in pasted text and get a CSV of line and count.

• Convert YAML to JSON

  Paste a YAML mapping and get JSON text, entirely in the browser. YAML it cannot convert is refused, not guessed.

• Decode base64 to text

  Paste base64 and get the decoded UTF-8 text in the browser.

• Validate JSON first error

  Paste JSON and learn whether it is valid, or see the line and column your browser reports for the first syntax error, or line 1 column 1 when it reports none.

• Diff two line lists

  Paste two lists of lines and get which lines are only in A, only in B, or in both.

• Compute day count to settlement

  Give a trade date, a settlement lag and an ISDA convention, and get the settlement date on the Payments Canada calendar and the exact day count fraction from the accrual start.

For agents: the JSON endpoints of four tools, and how each day count answer carries its own record.