Software that runs in your browser tab or on your local machine — never on our servers.
Zero uploads · Zero accounts · Zero runtime telemetry · MIT open source
🎙️ Watch the NotebookLM Audio/Video Deep Dive · 🎬 Explore 24 Interactive Tool Videos & Output Examples
| Product | What It Does | Concrete Input → Output Example | Live / Repo |
|---|---|---|---|
| 📜 PDF Studio (213★) | Full in-browser PDF editor: edit existing PDF text in place, fill forms, OCR scans, sign, vector-redact, organize pages, diff revisions, and ask on-device AI. | IN: Scanned 12-page contract with SSNs OUT: In-place edited, vector-redacted, searchable signed PDF |
Live App · ▶ Video |
| 🎨 reimagine-it (92★ · OpenSSF 7.7) | Content-derived HTML redesign engine & CLI. Rebuilds any HTML page into 17 design directions from the nouns, dates, numbers, and colors already in your markup. | IN: Raw, unstyled HTML report or gov page OUT: 17 redesigned HTML pages (Infographic, 3D, Editorial...) |
Playground · ▶ Video |
| 🧭 NavigatorsLab Tools | 24 local-first browser utilities & projects under CSP: default-src 'none', plus a stateless MCP server (POST /tools/mcp). |
IN: Vacation photos, 16 MB scans, receipts, NDAs OUT: Stripped JPEGs, ≤300 KB images, expenses.csv, signed PDFs |
Launch Hub · ▶ Video |
| 🩺 Design Health Action | 18 deterministic HTML/CSS design-quality checks for GitHub Actions across typography, palette, motion, content, structure, and performance. | IN: dist/**/*.html in Pull RequestOUT: 18/18 deterministic Pass/Fail CI verdict in <2s |
GitHub Action · ▶ Video |
| 🕵️ liecatchers | Post-run verification CLI for coding agents. 10 workspace sensors audit declared commands, git diffs, lockfiles, and handoffs. | IN: Agent claims "All done & tested!" OUT: Cryptographically signed RECEIPT.json proof |
GitHub Repo · ▶ Video |
| 🔪 Skill Slice | Copy one Read-verified skill folder at a time (npx skills add ... --skill <name>) for Cursor, Claude, and agentskills.io hosts. |
IN: Need one verified debugging/testing skill OUT: Single verified SKILL.md slice installed |
Explorer · ▶ Video |
| 📚 Book Guide MCP | Local-first Python MCP server over stdio turning your personal book library into agent-callable citations, playbooks, and Socratic tutors. |
IN: Local EPUB/PDF/MD technical library OUT: Chapter/page locators + executable playbooks |
Docs & Site · ▶ Video |
| 📡 Data Insights | Founder intelligence platform synthesizing public tech, security, and research signals into daily 5W1H briefs and weekly reports. | IN: Public RSS/API feeds across tech & security OUT: Daily 5W1H brief, weekly PDF & agent JSON API |
Docs & Site · ▶ Video |
| 🪓 Iron Axe: Legacy | Original side-scrolling arcade beat 'em up built in Godot 4 with combos, throws, elevation lanes, and team magic. | IN: Gamepad/keyboard combat input in Godot 4.3+ OUT: 60 FPS arcade action with 100% original art |
Project Page · ▶ Video |
Every utility runs 100% inside your browser tab, works offline as an installable PWA, and is verified on every commit by 39 automated Playwright E2E checks:
| Tool | Concrete Input → Output Example | Sample Proof | Links |
|---|---|---|---|
| 🛡️ Photo Privacy Kit | vacation-photo.jpg (GPS 41.0°N, 28.9°E) → clean.jpg (0 EXIF bytes) |
Pixels SHA-256: IDENTICAL |
Open · ▶ Video · Repo |
| 🔐 Password Breach Checker | Password typed locally → 5-char SHA-1 prefix (5BAA6) queried against HIBP |
800M+ corpus · 0 full hashes sent |
Open · ▶ Video |
| 🔍 Metadata Checker | Proposal.docx / Model.pdf → Author, Company & editing time stripped |
OOXML + PDF Info + XMP cleaned |
Open · ▶ Video · Repo |
| 🗜️ Image Shrinker | 16.0 MB scan.png + "under 300 KB" cap → 294 KB JPG in 8 binary-search steps |
16 MB → 294 KB (≤300 KB) |
Open · ▶ Video · Repo |
| 📄 Scan & Screenshot Cleaner | Skewed, shadowed phone photos of a lease → Straight, 300-DPI B&W PDF | ±4° deskew + auto-levels |
Open · ▶ Video · Repo |
| ✍️ Local E-Sign Pad | Unsigned NDA.pdf + drawn/typed signature → Flattened signed PDF |
0 editable form fields left |
Open · ▶ Video · Repo |
| 🧾 Receipts → One PDF | 18 unsorted receipt photos → 1 chronologically ordered, date-stamped PDF | Sorted by EXIF DateTimeOriginal |
Open · ▶ Video · Repo |
| 🔢 Receipt OCR → CSV | Receipt photos (GREEN GROCER $23.98) → expenses.csv via Tesseract WASM |
100% same-origin WASM OCR |
Open · ▶ Video · Repo |
| 🔳 QR Studio | Wi-Fi / vCard / URL → Crisp vector SVG & PNG (plus local jsQR decoder) |
Encode → Decode round-trip exact |
Open · ▶ Video · Repo |
| 🎧 Audio Trimmer | 40-min voice memo → Sample-accurate slice with fades & normalized MP3/WAV | Web Audio + self-hosted LAME |
Open · ▶ Video · Repo |
| 🧮 Invoice Generator | Line items + discount + tax → Vector PDF invoice ($408.00 total) |
Preview IS the PDF renderer |
Open · ▶ Video · Repo |
| 🗂️ Batch Rename & Sort | IMG_5847.jpg → 2026-09-05-receipt-001.jpg packed in one ZIP |
EXIF date + JSZip in-tab |
Open · ▶ Video · Repo |
| 🖨️ Print-Shop Prep | Camera photo + 4×6 in size → DPI verdict + 306×450 pt PDF with bleed |
True 300 DPI MediaBox |
Open · ▶ Video · Repo |
| 📑 PDF Pages | 40-page packet → Drag to reorder, rotate, delete, insert blank, or merge | pdf.js + pdf-lib local rebuild |
Open · ▶ Video · Repo |
| 🔬 Text Diff | Contract v1 vs Counterparty v2 → Line & word-level LCS diff + .diff export |
Word-level redline spans |
Open · ▶ Video · Repo |
| 📊 Text Stats | Essay draft → Words, Flesch grade, keyword density & sentence rhythm chart | One-click Markdown table copy |
Open · ▶ Video · Repo |