Many browsers. One state. All local.

Keeps bookmarks and history together on your Mac. Reads from every active browser and writes only where you want it to.

  • 8+Browsers
  • 100%local
  • 0cloud servers

Works with

What a sync
actually feels like.

One action in focus: Sync all. Press the button in the mockup — read, merge, write.

1Timeline

Everything up to date

Synced just now

  • Backups and anti-wipe active
Browsers + Add
Access macOS

Selected targets only

macOS only grants access to browser profiles you release.

Manage access
Home as it looks in the app: one large sync button, browsers and targeted profile access below it.

Your entire history.
In one place.

Safari, Chrome and every other active browser — in one searchable list. Title, address, time. Without switching browsers.

1Timeline

History

The shared history of your active browsers, searchable in one place.

Title Address Last visited Visits
OpenCode Go https://opencode.ai/ today, 20:48 8
Grok https://grok.com/ today, 20:48 12
Kimi AI with K3 https://www.kimi.com/code today, 20:54 3
mydealz – Deals https://www.mydealz.de/ today, 20:53 2
Apple Support https://apps.apple.com/… today, 20:49 5
edge logo – Google Search https://www.google.com/search?q=edge+logo today, 20:42 1
1Timeline https://1timeline.app/ today, 20:50 4
The history view in the app. Softly marked: not yet synced.
  • Every browser, one list

    Safari, Chrome, Brave and more — merged and sorted by time.

  • Searchable straight away

    Filter by title and address. Sort columns like in any native macOS table.

  • Out-of-sync entries stand out

    New since the last sync, or present in one browser only: quietly highlighted.

  • Cloud services stay separate

    Safari/iCloud and Chrome Sync remain the browser vendors’ services. 1Timeline does not run a sync server of its own.

Read from all.
You choose the writing direction.

No blind copying from A to B. The app reads the active browsers, merges the data and writes only to the targets you allow.

Sync all

reads all → writes to all

Full sync: every active browser receives the shared state as soon as it is closed.

→ Safari

reads all → Safari only

Safari is updated. Chrome, Brave and the others are left untouched.

→ Chrome

reads all → Chrome only

Only Chrome is written to. Safari and Brave are left untouched.

→ Brave

reads all → Brave only

Only Brave is written to. The pattern is the same as for Safari and Chrome.

Safari and Chrome.
Add the rest.

The core browsers are on by default. Edge, Brave, Arc, Vivaldi, Chromium and Firefox are under “Add browser” or in the settings.

The Chromium family

Chrome’s format: Bookmarks and History. Edge, Brave, Arc and the rest share one adapter.

Firefox

Through places.sqlite. Open it once so the profile is created, then switch it on.

Targeted access

You choose the browser profiles once. 1Timeline may then access only those targets.

Syncing can
destroy data.
Not this one.

Without protection

  • One browser briefly reports 0 entries. The second one gets emptied.
  • Writing while a browser runs: on quit, the state is gone.
  • A write that stops halfway, with no way back.

With 1Timeline

  • Anti-wipe: reading 0 bookmarks never counts as a mass deletion.
  • Writes only happen when a browser is closed. If it is open, 1Timeline tells you.
  • A backup before every write, rollback on error, restore from inside the app.

Everything a
clean sync needs.

Chosen write targets

Sync all, or Safari only, Chrome only, Brave only. Always read everything, write to one target.

Anti-wipe

Zero bookmarks are never passed on to other browsers as a deletion.

Backups

Versioned states, restore, and a diagnostic log.

Preview ⌘P

You see what gets added, changed or removed.

Auto-sync

After a browser quits and at launch, when you allow background operation. Writes happen only to closed browsers.

Help

An introduction, a question-mark button and the full guide inside the app.

StoreKit subscription

€3.99 per month through the Mac App Store. Apple manages purchase, renewal and cancellation.

Passwords

No vault of our own. Just the status of Apple’s extension.

Four steps.
Then it runs.

  1. 01

    Choose profiles

    Choose the browser profiles that 1Timeline may sync. macOS grants access only to these folders.

  2. 02

    Connect browsers

    Get Safari and Chrome ready. You can release more browser profiles under “Add”.

  3. 03

    Pick a direction

    Sync all, or specifically → Safari / → Chrome / → Brave. With a preview if you want one.

  4. 04

    Let it run

    The menu bar and auto-sync run in the background with your permission. Browsers must be closed for writing.

What that does
to the files on disk.

No service humming away in some cloud: a sync is a sequence of five steps on this Mac — read, compare, back up, write, verify.

  1. 01

    Read

    Choose the browser profiles once in the app. macOS grants 1Timeline targeted access to these folders — no access to the whole Mac and no upload to a 1Timeline server.

  2. 02

    Compare

    Every entry has an address and a timestamp. Identical addresses are merged, and where they differ the more recent state wins. Deletions are noted, so they do not reappear on the next run.

  3. 03

    Back up

    Before the first change, the affected data is copied — versioned, and including the database’s companion files. Only once that copy exists does the write begin.

  4. 04

    Write

    Writes only go to the browsers you released as targets, and only while they are closed. Each file is replaced atomically, never overwritten in parts — and can be restored from the backup taken beforehand.

  5. 05

    Verify

    If a browser suddenly reports no entries at all, although the previous run found some, 1Timeline treats that as a fault rather than a deletion. The missing entries are not passed on to the other browsers — instead, the empty browser gets the shared state written back to it.

And what 1Timeline
explicitly is not.

Limits are part of an honest description. Three things the store version deliberately does not do.

  • Not another browser

    1Timeline does not replace Safari, Chrome or Firefox, and it does no browsing itself. It connects the data of the browsers already sitting on your Mac.

  • No cloud service of our own

    Your browser data stays local. Apple manages the store purchase and app updates; 1Timeline runs no server of its own and does not upload browser data to us.

  • Not a password manager

    Passwords stay in the iCloud Keychain. The app only shows whether Apple’s extension is active; it never touches the credentials themselves.

Several layers
between a mistake and your data.

  • A backup before every write Versioned, restorable from inside the app.
  • Atomic writes Rollback whenever the state cannot be saved.
  • Only while a browser is closed 1Timeline tells you and writes only once the browser is closed.
  • Targeted file access Only the browser profiles you choose. No access to the rest of the Mac.

Your browser data stays on this Mac. You release only the profiles that 1Timeline may sync. Apple manages installation, updates and your Plus subscription. Every write is preceded by a backup.

Questions.
Answered briefly.

What gets synced, and in which direction?

Reading always happens from every active browser. Writing depends on the button: to all targets, to Safari only, Chrome only or Brave only. The arrow marks the write target, not “this one source only”.

Which browsers are supported?

Safari and Chrome are on by default. Optionally alongside them: Brave, Edge, Arc, Vivaldi, Chromium and Firefox. Switch them on under “Add browser” or in the settings.

Why does a browser have to be closed?

Chromium browsers and Firefox keep data in memory and write it back when they quit. A write during a running session would simply be lost. That is why you close the browser yourself; 1Timeline can then sync safely.

Which files can 1Timeline see?

You choose the browser profiles yourself. macOS grants 1Timeline lasting, targeted access only to these folders. The store version does not need access to the entire Mac.

Is the data uploaded to a cloud?

No. 1Timeline does not run a sync server of its own and does not upload browser data to us. Safari/iCloud and Chrome Sync remain the browser vendors’ own services and follow your settings there.

Is 1Timeline coming to the Mac App Store?

The store version runs in the App Sandbox and works with the browser profiles you release yourself. It does not need access to the whole Mac. Apple handles installation and updates; the store link will appear once the app is approved.

What does 1Timeline Plus cost?

€3.99 per month through the Mac App Store. The exact price is shown in the store. You manage purchase, renewal and cancellation in your Apple subscription settings.

Does the app sync passwords?

No. Passwords stay in the iCloud Keychain. The app only shows the status of Apple’s extension.

Where is the guide inside the app?

Behind the question mark in the toolbar, or under Settings → Help. You can also replay the introduction there — the one that explains read → merge → write on first launch.

In the Mac App
Store.

Install once, subscribe through Apple, stay up to date automatically.

1Timeline for macOS

Native universal app for Apple silicon and Intel. With targeted profile access, backups and anti-wipe.

Mac App Store

The store link will appear here once Apple approves the app.

Version
1.0.0
System
macOS 14 Sonoma
Price
€3.99 / month
Distribution
Mac App Store

What stays deliberately out?

The store version does not quit other apps and uses no 1Timeline server of its own. Browsers must be closed for writing.

The boundaries

Get it
from the Mac App Store.

Local syncing for your browser data. Apple manages installation, updates and your 1Timeline Plus subscription.

Mac App Store

Store link follows approval · macOS 14 Sonoma or later