Safe Zone - Blox Fruits: PvP-free zones

Safe Zones are areas where PvP is disabled - it's impossible to attack another player there. You'll find them at most major checkpoints in the game, from the starter islands to the Temple of Time. There's only one real limitation, and it matters: if you're already In Combat with someone, the zone won't protect you from that person.

How It Works

In a Safe Zone, players cannot attack each other.
Big exception: if you're already In Combat with someone, the zone won't protect you from that person as long as the combat indicator hasn't disappeared. This is intentional, to prevent running to take shelter as soon as you're losing a duel.
The zone takes about a second to activate: you can therefore get hit in the very first moments after joining the server.
Your movement speed decreases by about 37.5% while you remain in a Safe Zone.

In-Game Messages

When entering the zone: "🛡️Safe Zone - PvP disabled🛡️"
When trying to attack a player inside: "⚔ Cannot attack players in a Safe Zone! ⚔ "

Where to Find Them

Pirate Starter Island
Marine Starter Island
Jungle (around the Blox Fruit Gacha, added with Update 20)
Kingdom of Rose (Docks 2)
Café
Raid Room (Hot and Cold)
Church of Prophecy
Port Town (at the docks)
Castle on the Sea (in the castle's main building)
Mansion (Third Sea)
Temple of Time
Tiki Outpost (at the docks)

The starting point in each sea is always a Safe Zone: Pirate Starter and Marine Starter in First Sea, the Kingdom of Rose docks in Second Sea, those of Port Town in Third Sea. No one can attack you while you're spawning.

PvP Tips

The Third Sea portals generally lead to Safe Zones: very handy for taking shelter there and waiting to leave In Combat status.
Be careful though: if your opponent also has access to the portals, they can chase you there.
Conversely, if a player just finished fighting and is waiting in a Safe Zone, attacking them as soon as they leave allows you to immediately resume the fight.

Private Servers and Friendly PvP

Since Update 24, on a private server set to "Friendly PvP", you can be attacked at any time, even inside a Safe Zone. In return, dying to another player costs you neither honor nor bounty, and the one who kills you doesn't gain any either.