Privacy Tools Cheat Sheet

Last Updated: November 21, 2025

Secure Browsers

Browser Privacy Level Best For Notes
Tor Browser Maximum Anonymity, censorship bypass Slow but most private, routes through Tor network
Brave High Daily browsing with good privacy Chromium-based, built-in ad/tracker blocking
Firefox (hardened) High Customizable privacy Open source, extensive privacy add-ons
Mullvad Browser Very High Privacy without Tor slowness Firefox fork, Tor Browser features minus Tor network
LibreWolf High Firefox privacy out of box Pre-configured Firefox with privacy defaults

Essential Browser Extensions

uBlock Origin
Best ad/tracker blocker, lightweight and powerful
Privacy Badger (EFF)
Automatically blocks invisible trackers
HTTPS Everywhere
Force HTTPS connections (built into most browsers now)
Decentraleyes
Local CDN emulation to prevent tracking
ClearURLs
Remove tracking parameters from URLs
Cookie AutoDelete
Automatically delete cookies when tabs close
CanvasBlocker
Prevent canvas fingerprinting
Bitwarden
Open source password manager extension

Secure Messaging Apps

App Encryption Metadata Protection Best For
Signal E2E (Signal Protocol) Minimal metadata Most recommended for everyday use
Session E2E (Signal fork) No phone number, onion routing Maximum anonymity
Threema E2E (NaCl) No phone number required Swiss-based, paid app (one-time fee)
Element (Matrix) E2E (Olm/Megolm) Decentralized, self-hostable Open federation, developer communities
Wire E2E (Proteus) Good Business/team communication
Briar E2E P2P, no servers High-risk situations, works offline

Email Services (Privacy-Focused)

ProtonMail
E2E encrypted, Switzerland, free tier, zero-access encryption
Tutanota
E2E encrypted, Germany, free tier, open source
Mailbox.org
Encrypted, eco-friendly, Germany, paid
StartMail
From creators of StartPage, Netherlands, PGP support
Posteo
Anonymous payment, Germany, sustainable, €1/month
Mailfence
OpenPGP support, Belgium, free tier

Search Engines (Private)

Search Engine Privacy Approach Results From
DuckDuckGo No tracking, minimal logs Bing, own crawler, 400+ sources
Startpage Anonymous Google proxy Google (anonymized)
Brave Search Independent index, no tracking Own crawler
Searx/SearXNG Self-hostable metasearch Multiple engines aggregated
Qwant European, no tracking, GDPR Own index + Bing
Mojeek Independent crawler, no tracking Own index (UK-based)

Password Managers

Tool Type Platform Key Features
Bitwarden Cloud/Self-hosted All Open source, free tier, audited, best overall
KeePassXC Local database Desktop Fully offline, open source, no cloud
1Password Cloud All User-friendly, team features, Travel Mode
Proton Pass Cloud All From ProtonMail team, E2E, aliases
KeePass (classic) Local Windows Original, highly extensible, offline

Cloud Storage (Encrypted)

Proton Drive
E2E encrypted, from ProtonMail, Switzerland, free 5GB
Tresorit
E2E encrypted, zero-knowledge, Switzerland, enterprise
Sync.com
E2E encrypted, Canada, generous free tier (5GB)
Cryptomator
Client-side encryption for any cloud (Dropbox, Drive, etc.)
Nextcloud
Self-hosted, open source, full control
MEGA
E2E encrypted, 20GB free, controversial history

Operating Systems (Privacy-Focused)

OS Base Privacy Level Use Case
Tails Debian Maximum Live OS, amnesia, Tor by default
Qubes OS Fedora/Debian Very High Security by compartmentalization
Whonix Debian Very High Tor-focused, runs in VMs
GrapheneOS Android Very High Hardened Android for Pixel phones
CalyxOS Android High Privacy Android with microG
Linux Mint/Ubuntu Privacy Remix Ubuntu/Debian Good Daily use with privacy tweaks

Two-Factor Authentication (2FA)

Aegis Authenticator (Android)
Open source, encrypted backup, local storage
Raivo OTP (iOS)
Open source, encrypted iCloud sync
andOTP (Android)
Open source, encrypted backup
YubiKey (Hardware)
Physical security key, phishing-resistant
Nitrokey (Hardware)
Open source hardware key
Authy (avoid if possible)
Cloud sync but proprietary and can't export

DNS Providers (Privacy-Respecting)

Provider DNS Addresses Features
Quad9 9.9.9.9, 149.112.112.112 Malware blocking, no logging, non-profit
Cloudflare 1.1.1.1, 1.0.0.1 Fast, minimal logging (24h), DNSSEC
NextDNS Custom Customizable blocking, analytics, free tier
AdGuard DNS 94.140.14.14, 94.140.15.15 Ad/tracker blocking, family protection
OpenDNS 208.67.222.222, 208.67.220.220 Phishing protection (owned by Cisco)

File Encryption Tools

VeraCrypt
Full disk/container encryption, TrueCrypt successor, cross-platform
Cryptomator
Cloud storage encryption, open source, mobile apps
GnuPG (GPG)
File encryption, email encryption (OpenPGP), signing
7-Zip with AES-256
Archive encryption, cross-platform
age (modern alternative)
Simple file encryption tool, modern replacement for GPG
BitLocker (Windows)
Built-in full disk encryption (TPM support)
FileVault (macOS)
Built-in full disk encryption
LUKS (Linux)
Standard Linux disk encryption

Metadata Removal Tools

ExifTool
Remove EXIF data from images (GPS, camera info)
MAT2 (Metadata Anonymisation Toolkit)
Remove metadata from documents, images, audio
Scrambled Exif (Android)
Remove metadata before sharing photos
ImageOptim (macOS)
Strip metadata while optimizing images

Anonymous Services

Service Purpose Features
SimpleLogin/AnonAddy Email aliasing Create disposable email addresses
Guerrilla Mail Temporary email Disposable inbox, no registration
MySudo Virtual identities Temporary phone numbers, emails
Privacy.com Virtual cards Disposable credit card numbers (US only)
JMP.chat Phone number XMPP-based virtual number

Privacy Audit Checklist

Use password manager for unique passwords
Never reuse passwords across services
Enable 2FA on all critical accounts
Use authenticator app or hardware key
Switch to private email provider
ProtonMail, Tutanota instead of Gmail
Install privacy browser extensions
uBlock Origin, Privacy Badger minimum
Use private search engine
DuckDuckGo, Startpage instead of Google
Review app permissions on phone
Remove unnecessary permissions
Use VPN on public WiFi
Always encrypt public network traffic
Enable full disk encryption
BitLocker, FileVault, or LUKS
Review social media privacy settings
Limit data sharing and visibility
Delete unused accounts
Use justdelete.me or accountkiller.com
Opt out of data brokers
Use services like DeleteMe or manually opt out
Use encrypted messaging for sensitive chats
Signal for personal, Element for teams
💡 Pro Tip: Privacy is a spectrum - you don't need to use all tools at once! Start with the basics: password manager, browser extensions (uBlock Origin), and private search engine. Then gradually add Signal, private email, and VPN. The best privacy tool is the one you'll actually use consistently. Remember: convenience and privacy often trade off, so find the balance that works for your threat model!
← Back to Data Science & ML | Browse all categories | View all cheat sheets