700+ developer tools across 34 categories -- JSON formatters, encoders, converters, hash generators, regex testers, and more. Every tool runs client-side with zero server round-trips. Your data never leaves your device.

• 700+ tools across 34 categories (JSON, text, encoding, crypto, regex, color, datetime, and more)
• Privacy-first -- all tools run entirely in your browser, no data leaves your device
• Instant results -- zero latency, no loading spinners, no server round-trips
• Open source -- MIT licensed, fully transparent, community-driven
• Static site -- deployed on Cloudflare Pages for fast global delivery
• Dark mode -- full light/dark theme support
• Keyboard shortcuts -- Cmd/Ctrl+K search, Cmd/Ctrl+Enter to execute

• Node.js >= 20.0.0
• pnpm >= 10.0.0

git clone https://github.com/kranthie/utils.live.git
cd utils.live
pnpm install
pnpm dev

The app will be available at http://localhost:4000.

pnpm turbo build           # Static export to apps/web/out/
npx serve apps/web/out     # Preview locally

Monorepo managed by Turborepo + pnpm workspaces:

utils.live/
├── apps/
│   └── web/                  # Next.js 16 static site
│       ├── app/              # App Router pages
│       ├── components/       # React components
│       └── public/           # Static assets + Cloudflare config
├── packages/
│   ├── tools/                # Core tool engine (pure functions)
│   │   ├── src/tools/        # Tool implementations by category
│   │   ├── src/core/         # Executor, registry, validation
│   │   └── tests/            # Unit tests (100% coverage enforced)
│   └── config/               # Shared ESLint/Prettier config

Every tool is a stateless pure function defined via defineTool():

• Schemas -- Zod-based input, output, and options validation
• Execute -- a pure function that transforms input to output
• Meta -- id, name, description, category, keywords, icon

All tools are client-tier only -- no server, no database, no API calls.

Contributions are welcome! See CONTRIBUTING.md for guidelines.

The fastest way to contribute is to add a new tool:

pnpm generate:tool -- --name my-tool --category json

This scaffolds the tool implementation and test file. See the contributing guide for details.

pnpm dev                    # Start development server
pnpm turbo build            # Build all packages
pnpm turbo test             # Run all tests
pnpm turbo lint             # Lint all packages
pnpm turbo typecheck        # Type check all packages
pnpm format                 # Format with Prettier
pnpm generate:tool          # Scaffold a new tool

UI strings live in apps/web/messages/en.json. To generate a translated locale file, run the AI translation script:

export ANTHROPIC_API_KEY=sk-ant-...   # Required: your Anthropic API key

pnpm translate -- --locale es         # Spanish
pnpm translate -- --locale fr         # French
pnpm translate -- --locale de         # German
pnpm translate -- --locale pt-BR      # Brazilian Portuguese

This reads messages/en.json, calls the Claude API, and writes messages/{locale}.json.

Notes:

• ICU plural patterns ({count, plural, one {# result} other {# results}}) are preserved exactly — only surrounding text is translated.
• Brand names and untranslatable terms are flagged with a [REVIEW] prefix in the output — search for [REVIEW] in the output file and verify those strings manually.
• The script splits strings into batches of 80 to stay within model context limits.
• Key names are never translated, only values.

This project is licensed under the MIT License.