# Real-time Sync Obsidian | 100% Free

**URL:** <https://forum.obsidian.md/t/real-time-sync-obsidian-100-free/120784>\
**Category:** Plugins\
**Created:** [November 2, 2026, 9:38am UTC](https://forum.obsidian.md/t/real-time-sync-obsidian-100-free/120784 "2026-11-02T09:38:35Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![abismalmx](https://forum.obsidian.md/user_avatar/forum.obsidian.md/abismalmx/32/97891_2.png) [@abismalmx](https://forum.obsidian.md/u/abismalmx)\
**Post date:** [November 2, 2026, 9:38am UTC](https://forum.obsidian.md/t/real-time-sync-obsidian-100-free/120784/1 "2026-11-02T09:38:35Z")

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> ## Disclaimer
> 
> Is this plugin **open source**? Yes  
> Is this plugin completely **free**? Yes  
> Is this plugin **vibe-coded** beyond the author’s ability to comprehend how it works? No  
> Community Directory: `[Link](`[OmniSync](https://community.obsidian.md/plugins/omnisync)`)`

> ![image](https://forum.obsidian.md/uploads/default/original/3X/b/9/b9ab6eeaa688abdd0e404c1ef3108697e913dc9c.jpeg)
> 
> ### **⚡ Why OmniSync Changes Everything**
> 
> Every common Obsidian sync alternative today forces you into an unwanted compromise:
> 
> 1. Paying a recurring monthly subscription ($4 to $10/month per vault).
> 2. Entrusting your sensitive notes and thoughts to third-party tech giants (Dropbox, Google Drive, OneDrive).
> 3. Self-hosting and maintaining complex server stacks (CouchDB / Docker containers on a paid VPS).
> 
> **OmniSync completely discards that premise.** It turns your devices into direct peers. Notes travel directly peer-to-peer at lightning speed, encrypted before leaving your machine, with zero central authority tracking your activity.
> 
> ## **🌟 Key Highlights & Architectural Advantages**
> 
> ### **⚡ 1. Free Real-Time Sync (Google Docs Experience)**
> 
> - **Real-time sync, free:** Your notes sync across your devices the instant you type, with no subscription and nothing to pay.
> - **Live Remote Cursors & Selections:** Deeply integrated into Obsidian’s **CodeMirror 6** editor engine. Watch remote cursors glide across the screen with distinct colors in real time.
> - **Simultaneous Live Typing:** Type on your phone and watch words appear instantly on your desktop monitor without lag.
> - **Smart 3-Way Merge Engine:** Divergent edits made while offline reconcile automatically at the character level using stored base snapshots. **Zero overwritten paragraphs, zero messy conflict file duplicates (`.sync-conflict`)**.
> 
> ### **🥷 2. Zero Accounts, Zero Central Servers, Zero Logs**
> 
> - **Complete Privacy:** No email registration, no sign-ups, no passwords to create or leak.
> - **True Zero-Knowledge (E2EE):** Everything is encrypted locally with **AES-256-GCM** before touching any network socket.
> - **Cryptographic Path Obfuscation (HMAC):** File paths and directory trees are hashed deterministically (`hmac("Secret/Note.md") → 8f2a...`). Network observers only see encrypted payloads and never know your note titles or vault structure.
> - **No Server Footprint:** Direct WebRTC channels and ephemeral signaling relays (Nostr or your own Serverless Worker) maintain zero activity logs or user identities.
> 
> ### **📲 3. Instant Ephemeral QR Pairing (5 Seconds, Zero Typing)**
> 
> - Forget manually typing long S3 keys, WebDAV endpoints, or GitHub Personal Access Tokens on mobile touchscreens.
> - Open the pairing wizard on desktop, **scan the QR code with your mobile camera** , and confirm.
> - An **ECDH P-256** key exchange takes place using a single-use token with a 2-minute expiration (TTL). Once completed, keys are stored in-memory/keychain and the token is burnt forever.
> 
> ### **🔄 4. Robust Asynchronous Sync (Offline & Sleep Support)**
> 
> - Your phone doesn’t need to be awake or online when you work on your computer.
> - Pending changes sit securely encrypted in a transient mailbox (on public Nostr relays or your own **free, 1-click deployable Cloudflare Worker** ). The moment your phone wakes up, it catches up seamlessly.
> 
> > ⚠ **OmniSync is not a backup.** Mailbox notices expire after 7 days; R2 blobs after 10 days; public Blossom blobs in ≈7 days. It is a real-time transit layer — not permanent storage. Each device keeps its own vault. For long-term safety, pair it with a backup solution (iCloud, Dropbox, a manual copy, or Obsidian Sync).
> 
> ### **📦 5. Native Large Binary & Media Handling (Blossom Protocol)**
> 
> - Powered by the **Blossom (BUD-01/02)** protocol addressed directly by SHA-256 hash. Large images, PDFs, audio, and attachments sync smoothly without clogging memory or database records.
> 
> ### **🛡 6. Safe Data Preservation (Obsidian Trash Integration)**
> 
> - When a remote peer deletes a note, OmniSync **never performs an irreversible disk wipe** : files are safely routed to Obsidian’s local `.trash` folder, ensuring human mistakes can always be undone.

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