NavigatorLabs is the lab where local-first, private-by-default software gets built, shipped, and documented. Free, open-source tools that never upload your files, never ask for an account, and never phone home — with audit-grade release engineering behind every ship.
Everything below is free, MIT-licensed, and runs where your data already lives — your machine, your browser.
Content-Derived Design. Paste an HTML page; get a standalone redesign built from that page's own nouns, dates, numbers, and colors — never invented. 17 design directions, Auto direction-picking, a 19-rule deterministic audit, an MCP server, and a live playground.
The free, private PDF editor that runs 100% in your browser. Edits the text already inside the PDF, fills & flattens forms, OCRs scans locally, signs, redacts, merges, diffs two revisions, and answers questions with an on-device LLM.
Fifteen private utilities in the browser: strip photo GPS, shrink images to an exact size, sign PDFs, reorganize pages, OCR receipts to CSV, generate QR codes without a third party seeing them, diff contracts word-level, trim audio, and more.
Playbooks and tutors (Socratic, Avicenna) your coding agents run locally — Cursor, Claude, VS Code, Zed. Citations from books you own. No API keys for the core loop.
Exam-guides platform — certification prep organized into topic units with quizzes. Built the same way: fast, honest about what it knows, no dark patterns.
The 18 deterministic design-quality checks from reimagine-it, standalone — drop it on any HTML repo as a CI gate. No LLM, no API key, no flaky scores.
The privacy promise is easy to say. Here is the machinery that makes it checkable — on every release, not just the marketing page.
PDF Studio and Tools run entirely in your browser; the CLI has zero runtime dependencies and makes no network calls. There is no server to trust because there is no server.
OpenSSF Scorecard 7.0, npm packages with SLSA provenance, cosign signatures, SHA-pinned CI actions, Dependabot, secret-scanning push protection.
17 committed design artifacts regenerate byte-identically in CI. The proof set includes six real public-domain government pages — NPS, NASA, NOAA, Census, Federal Register, Smithsonian.
Every change lands by PR through 16+ required checks — 116 tests, a reproduction guard, docs-parity gates, and a workflow linter. 30 merged PRs and counting.
The lab sends hard, reviewable fixes back to the tools it builds on.
conversation_id correctly in llm logs --data-idsMERGED — #1613schema_dslOPEN — #1612