Synch

Keep your Obsidian notes in sync on your own server

By Synch and hhhjin

InstallOpens in your own Appflare
Stars
262
262 stars on the app's GitHub repository.
Installs
Under 10
Fewer than 10 Appflare users run this app, from anonymous usage data; smaller counts are not published.
Plan
Free
Runs on Cloudflare's free Workers plan.
License
MIT
An open-source license: you may use, change and share the app on its terms.
Version
0.5.5
Version 0.5.5.
Last tested
Oct 14
The catalog installed this version in a test account and it answered, on Oct 14, 2026.

About

A self-hosted alternative to Obsidian Sync.

Your own server for Synch, end-to-end encrypted real-time sync for Obsidian vaults: notes are encrypted on each device, and the Worker relays and stores only ciphertext in a Durable Object, D1 and R2.

Features

  • Sync Obsidian notes and attachments between desktop and mobile devices
  • Encrypt notes and file names on your devices before uploading them
  • Restore earlier versions of your notes from encrypted history
  • Recover deleted notes and attachments from version history
  • Merge compatible edits when the same note changes on different devices
  • Keep a separate copy when conflicting edits overlap

Deploy Synch on Cloudflare

  1. Step 1: Set up Appflare in your Cloudflare account

    Once

    Appflare installs itself into your own Cloudflare account from your browser, and runs on the free Workers plan, as Synch does. See what Synch needs on your account.

    Set up AppflareAlready have Appflare? Install Synch

  2. Step 2: Install Synch

    The install form asks you for:

    • Allowed sign-up emails

    Appflare generates two values for you: Session signing secret and Sync token secret.

    One switch on the form puts Synch behind Cloudflare Access, so only the people who use your Appflare can open it.

  3. Step 3: Finish setting it up

    After the install, Appflare shows two short steps for Synch, on its page.

With Appflare instead of by hand

  • Nothing to build on your computerAppflare sets itself up from your browser, with no API token to create and nothing to install.
  • Updates in one clickAppflare tells you when the catalog has a new version, and Update installs it.
  • Health checksAfter every install and update, Appflare checks that the app answers.
  • It stays in your own accountEverything runs on your Cloudflare account and your plan, and Appflare records what it creates, so an uninstall removes it.

What it needs on your account

  • D1 databaseThis app uses it
  • R2 storageThis app needs it
  • Durable ObjectsThis app uses it
  • Runs on a scheduleThis app uses it

Questions

Does Synch run on Cloudflare's free plan?

Yes. Synch runs on Cloudflare's free Workers plan, and so does Appflare.

What does Synch create in my Cloudflare account?

Appflare creates a Worker for Synch and the resources it uses: D1 databases, R2 buckets, Durable Object classes and cron triggers. Appflare records each resource it creates; an uninstall deletes them, keeping any data you choose to keep.

How do I update Synch?

When the catalog has a new version, Synch's page in Appflare says Update available. Select Update: Appflare takes a snapshot first, so you can roll back to the version before. You can also let Appflare update it automatically.

Is Synch open source?

Yes, under MIT. An open-source license: you may use, change and share the app on its terms. Its source code is at github.com/hjinco/synch.

Links

Packaged for the catalog by MendyLanda.

Authors

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