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Utility & Misc

Miscellaneous developer utilities

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Miscellaneous developer utilities

A catch-all category for tools that don't fit cleanly elsewhere: file converters between obscure formats, byte-size calculators for storage planning, IP-address utility tools, unit converters for distance / weight / temperature where developer use cases come up (think log rotation policies and weather APIs), QR-code generators with payload validation. The bar for inclusion is "do enough developers reach for it often enough that bookmarking it pays off?" — the tools here might not be your daily driver, but when you need them, you really need them.

11 tools

Timezone Converter

DST-aware world clock with a time slider, multi-zone meeting planner, and Intl/date-fns/Luxon code output

Open Timezone Converter

Semantic Versioning Helper

Parse, bump, and compare semver, plus a range tester (^ ~ x hyphen ||) and changelog generator

Open Semantic Versioning Helper

Z-Index Manager

Build a named z-index scale with a visual stack, conflict detection, and CSS/SCSS/JS/TS/Tailwind export

Open Z-Index Manager

Geolocation Mock Generator

Seeded coordinates and routes with a map preview; export navigator override, Playwright, Puppeteer, or GeoJSON

Open Geolocation Mock Generator

Fake Address Generator

Reproducible, multi-locale fake addresses with validation and map links; export JSON, CSV, SQL, or TypeScript

Open Fake Address Generator

Random User Generator

Reproducible seeded fake user profiles with locales and field selection; export JSON, NDJSON, CSV, SQL, or TypeScript

Open Random User Generator

Lorem Ipsum Code Generator

Code-flavored placeholders: identifiers, comments, JSON, SQL, endpoints, regex & snippets in JS/TS/Python/Go

Open Lorem Ipsum Code Generator

Package.json Generator

Build a complete package.json with framework presets, scripts, deps, exports map, engines, and live validation

Open Package.json Generator

Chrome Extension Manifest Generator

Build a valid manifest.json (V3 or V2) with a permission picker, a live install-warning preview that mirrors Chrome’s consent dialog, validation, and a runnable starter-project ZIP

Open Chrome Extension Manifest Generator

App Icon Generator

Turn one image into complete icon sets for iOS, Android, Web/PWA & macOS — Contents.json, adaptive icons, maskable, manifest & favicon.ico — in one ZIP

Open App Icon Generator

SVG to React Component

Convert SVG to a clean TSX/JSX/React Native component — currentColor, prop spread, forwardRef, memo, live preview

Open SVG to React Component