Encrypting Notes in Obsidian, Notion, and Evernote: What Works and What Doesn't

You take notes in Obsidian, Notion, or Evernote. At some point you want to add something sensitive — a password, a private thought, confidential client information. You wonder if the app protects it. The honest answer varies significantly by app, and in most cases, the protection is less than you'd expect. Here's what each app actually does — and when to use a browser-based encryption tool instead.

Notion: No Native Encryption for Notes

Notion encrypts data in transit (HTTPS) and at rest on their servers (AES-256), but this is server-side encryption — Notion holds the keys. Notion employees with appropriate access can read your notes. There is no end-to-end encryption, no per-note password, and no way to make individual notes unreadable to the platform.

For teams on Business or Enterprise plans, Notion offers HIPAA compliance (with BAA) and SSO — but these are access controls, not encryption that prevents Notion from reading content.

What this means for sensitive notes in Notion:

• Your notes are protected from other users (proper access controls)
• They are NOT protected from Notion, law enforcement with a valid order, or a major breach
• Guest access to a page means that person can read all content on that page

Workaround: Pre-encrypt sensitive text with AES-256-GCM before pasting into Notion. Paste the cipher string. Notion stores an unreadable cipher; you decrypt it when you need it.

Evernote: Limited In-Note Text Encryption

Evernote offers selective text encryption within notes — you can highlight text and encrypt just that portion with a password. This is a meaningful privacy feature that Notion lacks.

Evernote encrypted text details:

• Uses AES-128 (not 256) with a user-provided password
• Only text can be encrypted — not attachments or images
• The encrypted block shows as a locked padlock icon in the note
• Only available in certain Evernote plan tiers
• Not available in Evernote web client — desktop app required

Evernote's implementation is better than nothing, but AES-128 is a step below AES-256, and the desktop-only limitation is restrictive.

For full control: Pre-encrypt with AES-256-GCM and paste the cipher into Evernote. You get stronger encryption and it works in any Evernote client.

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Obsidian: Local Files Mean More Control, Plugins Add Encryption

Obsidian stores notes as local Markdown files on your device — not in the cloud by default. This is a fundamental privacy advantage: no cloud provider, no platform access. Your notes are only as exposed as your device is.

Obsidian encryption options:

• No sync (default): Notes live on device only. Most private option — not accessible remotely but fully under your control.
• Obsidian Sync (paid): End-to-end encrypted sync with Obsidian holding the encryption key. They claim they cannot read content. Trustworthy if you accept that claim.
• Plugin: Meld Encrypt: Community plugin that encrypts specific blocks within a note using a password. AES-256-GCM. Works in the local file context. Notes with encrypted blocks still require the password to view that content even if someone accesses your vault.
• Plugin: Encrypt Files: Encrypts entire note files.

Obsidian is the most privacy-favorable of these three for sensitive notes, especially with local-only storage and the Meld Encrypt plugin.

Alternatives With Full End-to-End Encryption

If note encryption is a primary requirement, consider purpose-built encrypted note apps:

Standard Notes — End-to-end encrypted from the start. Open source. Free tier available. Every note is E2EE — they cannot read your content. Desktop, mobile, and web. Best Notion-like experience with real E2EE.

Joplin — Open-source Markdown note app. Optional E2EE sync (with your own server or supported cloud). Strong privacy. Notes stored locally; encryption is opt-in for sync. Free.

Cryptee — Encrypted document and photo storage. E2EE, open source. Clean web interface.

These apps are suitable when all or most of your notes should be encrypted. The overhead of managing encrypted sync is worth it for full note privacy.

When Browser-Based Text Encryption Is the Right Choice

Pre-encrypting text before pasting into any note app makes sense when:

• You want to store ONE or a few sensitive items in an otherwise non-encrypted app (credentials, a secret code, private information)
• You need to share an encrypted note via any existing channel
• You're on a shared computer and don't want the app to store the content
• You want the encryption to travel with the content, not depend on the app
• The recipient uses a different note app or platform

Workflow: encrypt the sensitive text → paste the cipher string into Notion/Evernote/Google Docs/Slack/anywhere. The cipher is meaningless without your password, regardless of where it's stored or who accesses it.

This approach requires more manual steps than an integrated note encryption feature but provides complete independence from any platform's security practices.

Frequently Asked Questions

Does Notion read my notes?

Notion encrypts notes at rest on their servers, but they hold the encryption keys. Employees with appropriate authorization can technically read content. Notion has privacy policies restricting this, but unlike E2EE systems, the technical capability exists. For highly sensitive content, use E2EE or pre-encrypt before storing.

Is Obsidian Sync truly end-to-end encrypted?

Obsidian claims E2EE for their Sync service, meaning the encryption key is derived from your password and Obsidian holds an encrypted version of your key. Whether this constitutes true E2EE depends on trust in their implementation. For maximum security, use local-only storage or self-hosted sync.

Can I use a browser encryption tool with Obsidian?

Yes. Encrypt your sensitive text with a browser-based AES-256 tool, paste the cipher string into an Obsidian note. The cipher is just text — it stores in your Markdown file. Even if your vault syncs to a service, the cipher is unreadable without your password.

Why doesn't Notion just add end-to-end encryption?

E2EE fundamentally limits server-side functionality — you can't search encrypted content, share it with other users who have different keys, or collaborate in real-time without significant complexity. Notion's collaborative features require server-side access to content. This is an inherent trade-off between collaboration and privacy.