RelateDB is an offline-first, browser-based database schema designer. Model tables and relationships visually, import SQL or DBML, auto-arrange diagrams, and export SQL/DBML or images. No accounts, no cloud, no limits—everything runs locally in your browser for fast, frictionless schema design.

LocalMark Studio is a local-first Markdown editor designed for speed and privacy. What’s special here? Local-first storage: your notes live in your browser (IndexedDB). Real file tree: create folders + files, rename, delete. Command palette: press ⌘⇧P (Mac) / Ctrl⇧P (Windows/Linux). Smart paste: paste rich HTML and get clean Markdown. Live preview: split-pane preview with scroll sync. Extras: optional Mermaid diagrams + KaTeX math.

OptiImage Local is a free, privacy-first image compressor/resizer/converter that runs entirely in your browser. No uploads, no accounts—just drag, compress, convert (JPG/PNG/WebP/AVIF/JXL/QOI/ICO), and download.