Write Together.
Never Lose a Word,
Even Offline.
Create a document, share the link, and edit at the same time as anyone else. Go offline mid-sentence, your edits queue locally and merge automatically, with zero conflicts, the moment you're back.
No Setup. No Signup. Just a Shared Doc.
Every keystroke you and your collaborators make gets merged into one consistent document automatically, even across offline stretches.
Start a document
No signup. Click once and you're in a live document with a short, shareable id.
Share the link
Anyone with the id joins the same document and starts typing immediately.
Edit at the same time
See who's there, watch cursors move, and keep writing together.
Go offline anytime
Keep typing with no connection, edits merge automatically when you're back.
You type
Nothing waits on a round trip. Your edit lands in the document the moment you make it, online or off.
Stage 1 of 5
It queues if you're offline
Edits made while disconnected sit in a local queue, ordered and intact, ready to broadcast the moment you reconnect.
Stage 2 of 5
It broadcasts to peers
The moment your connection returns, queued edits stream out to every other replica currently in the document.
Stage 3 of 5
It merges without conflict
An RGA variant keeps every edit addressable by origin, not position, so concurrent edits never collide, they interleave correctly.
Stage 4 of 5
Every replica converges
Verified against thousands of simulated out-of-order, concurrent, and offline edits, every replica always reaches the same final state.
Stage 5 of 5
Everything Between a Blank Page
and a Synced Document.
See exactly who's editing, with live cursors and a distinct color for every collaborator.
Concurrent edits converge, automatically.
Type locally. Queue offline. Merge without conflict. Converge exactly once.
One short link is all it takes for anyone to join and start editing.
Every edit is addressable by origin, not position, nothing is ever overwritten.
Everything Between a Keystroke
and a Converged Document.
YSync keeps every collaborator's edits connected, so nothing is ever overwritten, dropped, or lost.
Most collaborative editors either lock the document while someone else edits, or quietly drop your changes when you reconnect. YSync does neither it’s built on a real CRDT, verified against thousands of simulated offline and concurrent edits.
Kartikey Bhatnagar
Creator of YSync
Every Replica Converges, By Design.
YSync’s sync engine is a sequence CRDT, an RGA variant that keeps every replica’s history addressable by origin, not position, verified against thousands of simulated out-of-order, concurrent, offline edits.
The difference: your edits stay connected from the first keystroke to the final, converged document.
No merge dialogs, no “keep mine or theirs.” Concurrent edits from every collaborator converge automatically, even after long offline stretches.
Powered by the YSync
CRDT Engine
Most collaborative tools either lock the document while someone else edits, or silently drop your changes when you reconnect.
With YSync, every edit is preserved and merged automatically — no matter the order it arrives in.
Sequence CRDT
An RGA variant keeps every replica's edit history addressable by origin, not position.
Local-first apply
Every keystroke applies to your local replica instantly, no round trip to a server required.
Deterministic merge
Concurrent edits from any number of replicas always converge to the same final document.
Offline queueing
Lose connection mid-sentence and keep typing, edits queue locally until you're back.
Verified under load
Tested against thousands of simulated out-of-order, concurrent, and offline edits.