Cronos zkEVM was an Ethereum layer-2 built on the ZKsync ZK Stack with Matter Labs, secured by Ethereum and using a token called zkCRO for gas. In 2026 its backers decided to retire it, so the network shuts down for good on June 3, 2027. What follows is a wind-down guide.
The layer-2 borrowed Ethereum's security to settle transactions cheaply, and for a while it was one of the first zero-knowledge chains live outside ZKsync's own network. That experiment is now ending. Cronos Labs is folding the effort back into the Cronos EVM chain, and anyone still holding assets on the zkEVM has a hard deadline to move them out.
So the useful way to read this page is backward from that deadline: what the chain was, why it is closing, and how to leave before the door shuts.
Why Cronos zkEVM is shutting down in 2027
Cronos zkEVM is shutting down because its backers chose to stop running two overlapping chains. On June 3, 2026, Cronos Labs said it would retire the zkEVM Alpha and consolidate development on Cronos EVM. The network stays live for a 12-month window, then shuts down for good on June 3, 2027.
The exact cutoff is June 3, 2027 at 3:00 AM UTC, after which the sequencer stops and the chain can no longer be reached (source: Cronos Labs). Cronos Labs gave two reasons for the call. Running a separate zkEVM alongside Cronos EVM split engineering and product effort, and the chain never reached the scale of developer activity, value locked, or users that would justify funding two chains at once. In plain terms, the branch was not paying for itself, so the company is closing it and pointing everyone at the main chain instead.
That is a deliberate consolidation, not a failure of the technology. The zkEVM worked, but Cronos decided its roadmap, built around tokenized assets and trading products on Cronos EVM, was better served by one chain than two. For readers, the takeaway is simple and time-bound: this is a chain with an end date, and the rest of this guide treats it that way.
What Cronos zkEVM was, in brief
Cronos zkEVM was an Ethereum layer-2: a separate chain that ran transactions cheaply and settled proofs of them back to Ethereum for security. It was built on the ZKsync ZK Stack with Matter Labs, it used a token called zkCRO for gas, and it went live in August 2024 (source: Cronos zkEVM Docs).
This article does not re-teach that general idea. The guide to layer-2 security covers how those proofs are checked and where the trust actually sits.
What made the Cronos version distinct was its lineage and its gas token. It launched in 2024 as one of the first two zero-knowledge chains to go live besides ZKsync Era, sharing the same underlying framework (source: Cronos zkEVM Roadmap). Its network identifier was chain ID 388. And instead of charging gas in ETH or plain CRO, it charged in zkCRO, which is the detail that trips up people trying to leave today.
How zkCRO worked as the gas token
On Cronos zkEVM, gas was paid in zkCRO rather than CRO or ETH. zkCRO was a yield-bearing, liquid-staked version of CRO run by Veno Finance: each unit was backed by CRO staked on the Cronos POS chain, so its value tracked that stake plus rewards. You needed zkCRO to do anything on the chain.
The backing chain is worth following, because it explains why exiting is not one click. When you deposited CRO into the bridge, it was staked and issued back to you as zkCRO, a token designed to slowly appreciate against CRO as staking rewards accrued (source: Cronos zkEVM Docs). That made zkCRO more than a simple gas coin. It was a claim on staked CRO sitting on another chain.
Because this article is about the wind-down, it keeps zkCRO to the essentials. The full story of how the token is minted, what backs it, and how holders unwind it lives in the dedicated guide to zkCRO. For the purpose of leaving the zkEVM, the one thing to hold onto is that zkCRO is a wrapper around staked CRO, so unwinding it takes an extra step or two rather than a direct swap.
What the shutdown means if you still hold assets there
If you still hold assets on Cronos zkEVM, the shutdown means you have to move them out or lose them. Deposits to the official bridge are disabled, so the only direction left is out. Anything still on the chain after it stops on June 3, 2027 will not be recoverable, and there is no grace period afterward.
This is the part that protects you, so it is worth being blunt. The official notice is explicit that assets remaining on-chain after the final shutdown will not be recoverable, which is why the guidance is to withdraw early rather than wait for the last few weeks. A layer-2 depends on live infrastructure, the sequencer and the bridge, to move value at all. When that infrastructure is switched off, a balance on the chain is not lost in the sense of being stolen; it is simply stranded, with nothing left running to process a withdrawal.
None of this is a reason to panic, and it is not a reason to rush into a bad transaction either. It is a reason to plan. If you have any balance on the zkEVM, put the deadline on your calendar now, well before the middle of 2027, and give yourself room for the extra steps that zkCRO in particular can require.
How to get your assets out before the deadline
To exit Cronos zkEVM, use the official Cronos bridge and send your assets to Cronos EVM as the destination. Keep a little zkCRO in your wallet first, because withdrawals still cost gas in zkCRO. One catch: zkCRO does not convert straight to CRO. It comes back as LCRO, which then unstakes to CRO over about 28 days.
Here is the order that saves grief. First, confirm you hold enough zkCRO to cover the withdrawal fees, since a wallet with assets but no gas cannot move anything. Then withdraw each asset through the official bridge, choosing Cronos EVM as the destination network. For plain tokens this is close to a normal bridge transfer, though a withdrawal that routes through Ethereum can take around two days to finalize (source: Cronos POS, EVM & zkEVM FAQ).
zkCRO itself is the exception. Because each zkCRO is backed by LCRO locked on Cronos EVM, redeeming it brings back LCRO rather than CRO, and turning that LCRO into ordinary CRO means either unstaking over roughly 28 days or selling it on a Cronos exchange at the market rate. Yield-bearing tokens from the same ecosystem, such as vETH and vUSD, follow a similar out-and-unwind pattern. The practical lesson is to start early, because the slowest step, not the fastest, sets your real deadline.
Where Cronos zkEVM leaves the Cronos ecosystem
With the zkEVM winding down, Cronos is settling back into two active chains. Cronos POS issues and secures CRO, and Cronos EVM runs the apps and is where development now goes. The zkEVM becomes a historical chapter, not a place to build. Most guides still count three live chains, which is the clearest sign they are stale.
| Chain | Role | Status |
|---|---|---|
| Cronos POS | Issues and secures CRO, payments | Active |
| Cronos EVM | Runs the apps, the main focus now | Active |
| Cronos zkEVM | Ethereum layer-2 experiment | Winding down, shuts June 2027 |
For everyone else, the map is now simpler than it used to be. The guide to how Cronos works puts the two remaining chains back in context, and the hub on what Cronos is covers how the token and the network fit together. The zkEVM is worth understanding as history and as a wind-down task, but not as a chain to move new money onto.
Frequently asked questions
How can I check whether I still have a Cronos zkEVM balance?
Switch your wallet to Cronos zkEVM and check the address in a matching block explorer. Record the wallet address, each token's name and contract address, and the displayed balance before you begin an exit. A zero balance on Cronos POS or Cronos EVM does not prove that the zkEVM address is empty, because balances are network-specific. Make this inventory before the deadline, while you still have time to resolve an unfamiliar token or wallet view.
What should I record before starting a zkEVM withdrawal?
Save the source address, destination address, token contract address, starting balance, and the transaction hash for every step. Those records make it easier to check the route in an explorer or explain a delayed transfer to official support. Include the network you selected, since the same wallet address can exist on several chains. Take the inventory before signing anything, not after, because a screen showing only the final balance may not reveal where an earlier step went.
How can I avoid a fake zkEVM exit site?
Open the bridge only from a link in Cronos documentation or an official announcement, then verify the full domain in the browser address bar. Do not use a sponsored search result, direct message, or unsolicited token link as your starting point. A legitimate exit does not require a recovery phrase, private key, or remote access. Review every wallet request before signing, especially token approvals. If the route or request is unclear, stop and verify it through an independent official channel.
What should I do if the official bridge does not show one of my tokens?
Do not send it to an arbitrary address or use an unverified site to force an exit. First confirm the token's exact contract address and whether the official bridge documents a supported route for it. Some wallet displays can show spam tokens or hide a token until its contract is added, so the symbol alone is not enough. Keep the asset in the wallet while you check official documentation or support channels, and never approve a transaction you do not understand.
How do I know a zkEVM withdrawal is actually complete?
Check more than the first confirmation screen. A completed exit should have a recorded source transaction and a visible balance or receipt on the intended destination network. Save the transaction hash for the source step, then inspect the destination with the same wallet address and the correct network selected. Do not submit duplicates merely because the destination has not updated immediately. Compare the asset, amount, and network before deciding that a transfer is missing.
Why should I keep a small gas buffer during a multi-asset exit?
An exit can involve several transactions, such as approvals, separate token withdrawals, or a correction after a failed attempt. Spending every last unit of the chain's gas token in the first transaction can leave the remaining assets stuck until you obtain more gas through a supported route. Plan the sequence, estimate the number of actions, and leave a buffer until every asset is visible on its destination network. This is an exit-planning safeguard, not a reason to add new funds to the closing chain.
What if I no longer control the wallet holding zkEVM assets?
Try the wallet's documented recovery process only if you still control its recovery phrase, private key, or connected hardware device. The shutdown does not create a special recovery channel, and no bridge operator can move funds without a valid signature from the wallet. Anyone who promises to bypass that requirement is attempting to steal access. Resolve account recovery early, then verify the recovered address on the zkEVM before planning the withdrawal steps.
Researched and written by the BloFin Academy editorial team with AI-assisted drafting. Updated July 2026. Primary sources: the Cronos Labs blog, the Cronos zkEVM documentation, and the crypto-org-chain project on GitHub.
This article is educational and general in nature, not financial or investment advice. Cryptocurrencies like CRO and zkCRO carry real risks, including price volatility, smart-contract bugs, bridge exploits, network shutdowns, and the chance of losing funds left on a network past its deadline. Nothing here is a recommendation to buy, sell, or hold any asset. Do your own research, and consider a licensed professional before making financial decisions. BloFin does not provide investment advice.