Development
Convert a cURL command into a portable HAR 1.2 request entry.
curl-to-har-converterFinance
Convert an amount between currencies using live exchange rates from a free, no-key API (open.er-api.com). Supports 160+ world currencies. Shows the converted amount, the exchange rate used, a comparison table against popular currencies, and the rate update timestamp.
currency-exchangeFinance
General-purpose debt payoff planner comparing avalanche, snowball, and minimum-only strategies. Enter debts as 'name, balance, APR%, minPayment $' per line plus an extra monthly payment. Shows payoff time, total interest, savings, balance decline curves, and a per-debt repayment detail table.
debt-payoff-calculatorMath & Numbers
Convert between ratios and decibels (10·log power, 20·log amplitude), and across absolute units dBm/dBW/dBV/dBu/dBFS/SIL
decibel-calculatorText Processing
Render text in hand-written cursive Unicode — delicate Script (ℋℯ𝓁𝓁ℴ) or heavier Bold Script (𝓗𝓮𝓵𝓵𝓸). Plain Unicode text, no font needed.
cursive-textValidation
Validate 9-character CUSIP North American securities identifiers with mod-10 check-digit verification, issuer base and issue-number breakdown.
cusip-validatorDevelopment
Convert a cURL command into a Go net/http code snippet with http.NewRequest, headers, and body
curl-to-goDevelopment
Convert a cURL command into a JavaScript axios code snippet with config object, headers, and data
curl-to-js-axiosDevelopment
Convert a cURL command into a JavaScript fetch() code snippet with headers, body, and method
curl-to-js-fetchDevelopment
Convert a cURL command into a PHP cURL code snippet with curl_setopt, headers, and post fields
curl-to-phpDevelopment
Convert a cURL command into a Python requests code snippet with headers, data, and method
curl-to-pythonDevelopment
Convert files into Data URIs (Base64 or percent-encoded) for inlining images, fonts, and assets directly into HTML, CSS, or Markdown
data-uri-generator