4.4.0

API

API v4.4.0 — QR Code, Captcha, Color, Convert, Hash, Placeholder.

Improved GET /qrcode: PNG output by default, new options (size, margin, correction, dark, light, icon, iconSize, iconPadding, iconRadius, format), icon overlay support with HTTPS validation and 2MB size limit.
Improved GET /captcha: new options (length, width, height, noise, bg, color), auto-generates random text when none is provided, X-Captcha-Text response header for server-side verification.
Improved GET /color: accepts optional ?hex= input to convert a specific color instead of generating a random one.
Expanded GET /convert: new unit categories — length (km, mi, m, ft, cm, in, yd), weight (kg, lb, oz, g, ton), data (b, kb, mb, gb, tb), speed (km/h, mph, m/s, knots). Absolute zero validation now only applies to temperature units.
Improved POST /hash: new encoding option (hex or base64), throws on unsupported method instead of returning error object, text validation on empty input.
Improved GET /placeholder: skeleton lineH and gap now scale proportionally to available height.
Extracted shared color and helper utilities into dedicated modules (colors.ts, helpers.ts).
Added since(version, min) helper for version branching in routes.
Added JSDoc to all utility functions.

Updated documentation for QR Code, Captcha, Color, Convert and Hash.
Added POST /chat main page with full documentation, merged redundant send sub-page.
Renamed Convert from "Temperature Conversion" to "Unit Conversion".
Added new parameters to Playground registry for all updated endpoints.
Added Method badges to all related endpoint links across Chat and Tic-Tac-Toe pages.
Try panel now displays image responses (PNG, SVG) instead of raw binary data.
Sidebar automatically scrolls to the active link on navigation.
Centralized language constants in i18n module, removed hardcoded language checks.