Encrypted Notes Vault, Multi-Format Exporter & Analytics
In an era dominated by centralized cloud platforms, telemetry surveillance, and remote database breaches, complete privacy requires storing sensitive notes, secret credentials, financial records, and creative writings directly on your hardware. Notes Encrypted Vault provides an uncompromising, browser-native offline sanctuary engineered with the Web Crypto API (`window.crypto.subtle`) to ensure military-grade client-side encryption alongside an advanced multi-format notes importer and exporter.
Unlike standard cloud-hosted note applications that send plain text or password hashes to remote backend databases, this workspace runs on a strict Zero-Knowledge Trust Architecture. Your master password is never transmitted, never stored in cookies, and never saved unencrypted. Cryptographic key derivation (PBKDF2 with 100,000 hashing rounds) and authenticated payload encryption (AES-256-GCM) execute completely within your device's browser execution context.
Multi-Format Notes Importer & Universal Conversion Engine
Beyond zero-knowledge encrypted storage, Notes Encrypted Vault features a versatile two-way file ingestion and export pipeline. Bring existing documents into your vault or export markdown notes, code blocks, task lists, and tables into 8 universal document formats without transmitting data to external servers:
Import individual documents across multiple formats including Markdown (.md, .markdown), Plain Text (.txt), HTML (.html, .htm), JSON (.json), CSV (.csv), Rich Text (.rtf), log files (.log), and source code (.js, .py, .css, .xml) with automatic syntax sanitization.
Convert plain text, Markdown notes, callout blocks, and tables directly into publication-ready PDF documents via your browser's native PDF print subsystem.
Export formatted notes into Microsoft Word `.doc` or universal Rich Text `.rtf` files compatible with WordPad, TextEdit, LibreOffice, and desktop office suites.
Export raw notes as portable `.md` files for Obsidian, Logseq, Notion, and VS Code, or structured `.txt` files for universal reading across any device.
Writing Analytics & Notes Text Transformation Suite
Track your document metrics, speech timing, and clean up unstructured text with real-time analytics and sanitization tools:
Live word count and dual character counts (total characters vs. characters excluding spaces) for meeting precise character limits.
Detailed structural breakdown measuring total sentences, paragraphs, checklist completion percentage, and line counts.
Accurate estimates for silent reading duration (~200 wpm) and spoken presentation time (~130 wpm) for speech and lecture rehearsal.
Technical Specifications & Cryptographic Primitives
PBKDF2 Key Derivation
Your master passphrase undergoes 100,000 hashing iterations using SHA-256 with a unique 16-byte random salt to derive a 256-bit AES encryption key.
AES-256-GCM Cryptography
Galois/Counter Mode (GCM) delivers authenticated encryption. Any tampering or data corruption in local storage is detected and rejected during decryption.
Zero Metadata Leakage
Note titles, tags, and body contents are combined into a single structured payload before encryption. Inspecting IndexedDB reveals zero plaintext titles.
How to Use Notes Encrypted Vault (Step-by-Step Guide)
Set up a strong password on initial launch. PBKDF2 stretches your passphrase with 100,000 hashing rounds directly on your device.
Import existing files in .md, .txt, .html, .json, .csv, .rtf, or code formats, choose quick templates like Task Checklist or Meeting Agenda, or draft directly in Markdown.
Access Quick Tools or the Text Tools modal (Trim, Empty Lines, Deduplicate, Fix Punctuation, Strip Hidden Characters), Case Converter, Line Sorter, or inspect live metrics in Document Insights.
Export decrypted individual notes into PDF, Word (.doc), Markdown (.md), RTF, or CSV, or generate an encrypted .vault backup file for cold offline storage.
Frequently Asked Questions (FAQ)
Q1. What file formats can I import into Notes Encrypted Vault?
You can directly import individual notes in Markdown (.md, .markdown), Plain Text (.txt), HTML (.html, .htm), JSON (.json), CSV (.csv), Rich Text (.rtf), log files (.log), and source code files (.js, .py, .css, .xml), as well as restore full encrypted backup files (.vault).
Q2. Can I convert my encrypted notes into Word (.doc), Markdown (.md), and PDF?
Yes. The built-in Export suite allows you to convert plain text or Markdown notes into PDF, Word (.doc), Markdown (.md), Rich Text (.rtf), HTML (.html), CSV spreadsheet (.csv), and JSON (.json) directly in your browser without transmitting data to external servers.
Q3. Is my master password or note data sent to any remote servers?
No. Notes Encrypted Vault operates on a strict zero-knowledge trust model. All cryptographic key derivations (PBKDF2 SHA-256) and authenticated AES-256-GCM operations execute locally on your device via the Web Crypto API.
Q4. What happens if I forget my master password?
Because this application does not store your plaintext password or master keys anywhere, there is no password reset mechanism. If you forget your password, the ciphertext cannot be decrypted. We recommend saving an optional password hint during setup.
Q5. How does the auto-lock and in-memory key purge protect my notes?
The application features customizable inactivity auto-lock (1, 5, 15, or 30 minutes), immediate lock on browser tab switch/blur, clipboard auto-clearing, and a 1-click Panic Wipe button that purges in-memory keys and decrypted note caches immediately.
Q6. How can I transfer my encrypted notes to another device?
Use the Export Encrypted .vault Backup feature in Settings. This downloads your encrypted records into a single .vault file. You can then import this backup file on any other device and unlock it with your master password.