A lightweight browser extension that provides instant AES-256 client-side encryption. Keep 99% of your doc searchable and collaborative while locking secret keys, client notes, and passwords right on your screen.
Team notes for onboarding. All non-confidential architecture details remain searchable and open for collaboration. Secrets below are encrypted using TextLock:
DATABASE_ENCRYPTION_KEY = "xK9#mQ2$pL8@vR4!wT6" | ADMIN_PASS = "Alpha99#Vault"
• Click the buttons in the browser toolbar above to test the Extension's real-time inline encryption.
Whether you prefer mouse shortcuts or blazing fast keyboard hotkeys, TextLock fits right into your workflow.
Highlight any line, bullet point, or paragraph and press Alt+E (Option+E on Mac) to encrypt. Press Alt+D to decrypt back to plaintext.
Click the TextLock toolbar icon in Chrome to open your session vault. Click 🔒 Encrypt Selection or 🔓 Decrypt Selection in a single click.
Press Alt+V to read or compose secrets in a floating RAM card. Decrypted text never enters the document canvas or Google Version History.
No backend database, no login credentials, and no telemetry. All math happens locally inside Chrome.
Utilizes the browser's native C++ Web Crypto API. Key derivation uses PBKDF2-SHA256 with 100,000 iterations, a fresh 16-byte random salt, and a 12-byte IV per line.
Your master password is held exclusively in Chrome's volatile session storage (chrome.storage.session). It is instantly wiped the moment Chrome closes.
Seamlessly overcomes the complex Google Docs HTML5 Canvas renderer and works across Google Sheets, Notion blocks, Office 365, Gmail, and standard web inputs.
Real feedback from engineers, founders, and security professionals using TextLock daily to keep sensitive notes safe inside Google Docs, Notion, and web workspaces.
“Always wanted to encrypt passwords and keys in Google Docs so nobody can see it. Finally I can move my Obsidian documents over to Google Docs and collaborate with team members without leaking credentials.”
“The Option+V Zero-Trace Peek is brilliant. Most extensions decrypt directly back into the document canvas, leaving secrets forever in Google Docs version history. TextLock holding it in RAM only is the proper security design.”
“We draft joint venture agreements and NDA addendums in Google Docs. TextLock lets us lock private settlement numbers and escrow instructions directly in the live draft. Shared parties simply decrypt with the agreed key.”
“I tried hacking together a userscript for Google Docs canvas before and it was a nightmare with the synthetic iframe. TextLock solved this cleanly. Alt+E and Alt+D hotkeys respond instantaneously.”
“I manage active campaign briefs across 6 different client accounts. Keeping sensitive ad budgets, unreleased launch URLs, and client logins encrypted inline saves me from maintaining separate vaults for every team.”
“The standalone web decryptor on textlock.app is what made our team adopt it immediately. Even if an external auditor doesn’t have the Chrome extension installed, they can decrypt or verify the block on any browser in 3 seconds.”
“Works seamlessly across Notion blocks. I store customer interview recordings and raw transcripts in Notion, and TextLock lets me redact and encrypt PII and participant names without breaking the block hierarchy.”
“Standard AES-256-GCM with 100k PBKDF2 iterations right in the browser engine. I inspected the background service worker and network tab—zero external telemetry, zero key servers. Exactly what zero-knowledge should be.”
“Fast, frictionless, and lightweight. We share client onboarding docs in Google Drive daily. Being able to lock payment gateway credentials and private staging credentials with one shortcut is a lifesaver.”
“My main worry with Google Docs extensions was formatting bugs or messy line breaks. TextLock cleanly swaps out the selected string for the encrypted tag and reverses it flawlessly without touching surrounding text styling.”
Shared a document with someone who doesn't have the Chrome Extension installed yet? They can decrypt or encrypt blocks directly in their browser below.
Have a question, encountered an edge case in a specific web editor, or want to suggest a new feature? Our engineering team reviews every message directly.
TextLock is built and maintained by NextTuber LLC with a strict zero-knowledge architecture.