What others skip, these tools count.

A collection of privacy-first web tools. Core calculations run locally in your browser — no first-party backend, no tracking, and no cookies.

Privacy note: form inputs are not uploaded. RateLens automatically requests only the current USD/CNY rate from the disclosed public services; if both fail, it asks for manual input instead of substituting a hardcoded rate.

Live: toolbox.stepaniah.me · Source: github.com/StepaniaH/Toolbox

• Privacy-first — core calculations stay client-side; no first-party backend, tracking, or cookies. External data access must be visible, optional, and have a local fallback.
• Bilingual — every tool ships both Chinese (zh) and English (en) interfaces.
• Catppuccin theme — Frappé (dark) + Latte (light); adoption of the shared theme contract is in progress.
• MIT licensed — all tools are open source under the MIT license.
• Static deployment — served as static files behind Caddy with path-based routing under one domain.

pnpm install && pnpm dev

Individual tools:

pnpm --filter=@toolbox/rate-lens dev   # run a single tool
pnpm build                              # build all tools
pnpm test                               # test all tools

See docs/INDEX.md for the project overview, docs/PLAN.md for the architecture direction, docs/RELEASE.md for the fixed release and rollback flow, docs/NEW_TOOL.md for the new-tool playbook, and docs/AGENTS.md for development conventions.

For a new tool, the maintainer only needs to describe the product normally. The agent must automatically use $develop-toolbox-tool, create a local newdev/<tool-id> from dev, and own the brief, platform integration, localized docs, privacy, and tests. Candidate branches are not pushed by default; an explicitly authorized integration review merges locally into dev, then pushes only dev when requested.

MIT