SOLTidy

Token launch

Lock your Solana token's metadata for good

Paste a mint to check whether its name, symbol and logo are still editable, then set the metadata to immutable with one signature from the update authority. The check works without a wallet.

How it works

  1. 1

    Paste the mint address

    The panel reads the Metaplex metadata account and shows the current name, symbol, URI, the Mutable or Immutable flag and the update authority. Tokens that are already immutable show a green Already immutable state.

  2. 2

    Connect the update authority

    The lock button unlocks only when the connected wallet is the update authority and the metadata is still mutable. Any other wallet can check a token but not change it.

  3. 3

    Confirm and sign

    Tick the confirmation that the change is permanent and approve one transaction with the 0.02 SOL fee. Every metadata field is written back unchanged; only the is-mutable flag flips to false. The panel reloads the account so you can verify it.

Why buyers and screeners want immutable token metadata

A Solana token's name, symbol and logo live in a Metaplex Token Metadata account, not in the mint. While that account is mutable, its update authority can rename the token, change the ticker and swap the logo at any time with a single UpdateMetadataAccountV2 instruction. That is how a token bought as one project can be rebranded overnight into an imitation of another, or how a scammer changes the image after listing. Wallets cache the old values for a while, so holders often notice late.

Screeners flag this. RugCheck lists Mutable metadata as a risk item, and DEX aggregators and token lists give more weight to immutable tokens. Making the metadata immutable removes the concern in one step: the Metaplex program refuses every later update, from anyone, forever. Together with revoked mint and freeze authorities it is what most people mean when they call a token renounced.

What immutable metadata locks, and what it does not

Locking freezes the on-chain fields of the metadata account: name (up to 32 bytes), symbol (up to 10 bytes), URI (up to 200 bytes), the seller fee, the creators list and the collection reference. The URI points to a JSON file with the description and image link, so the logo is locked only as far as the file behind the URI is fixed. A URI on IPFS or Arweave is content-addressed and cannot change; a URI on a web server you control can still serve a different image tomorrow. Check the URI before you lock.

It does not touch the mint account. Supply, decimals, the mint authority and the freeze authority are separate fields with separate instructions, so an immutable token can still be minted or have holder accounts frozen if those authorities are active. The panel shows both authorities next to the metadata so you can see what is left, and the Revoke Mint Authority and Revoke Freeze Authority pages handle them, each for the same 0.02 SOL.

Immutable versus transferring the update authority

People search for revoking the update authority, but Metaplex has no way to set it to nobody: the field must always hold a public key. Sending it to a burn address is possible but pointless and risky, because the authority is still needed for one thing, verifying the token as a member of a collection, and you would lose that for nothing. Setting is-mutable to false is the real lock. Afterwards the update authority cannot edit anything, no matter who holds it.

This page does exactly one thing: it sends an UpdateMetadataAccountV2 instruction whose data block is a copy of the current account, with is-mutable set to false and the update authority unchanged. If you also want a new name or logo, make those edits first with Update Token Metadata, since this is the last edit the account will ever accept. The Metaplex program only allows the flag to move from true to false, so there is no undo.

Tokens this tool cannot lock

Token-2022 mints that store their name, symbol and URI in the token metadata extension instead of a Metaplex account are not supported here; the panel says so when it detects the extension. Those fields are controlled by the extension's own update authority, and the equivalent lock is setting that authority to none through the Token-2022 program, which this page does not do.

Mints with no metadata account at all show as unknown tokens in wallets and have nothing to lock; the mint authority can create metadata with Update Token Metadata first and lock it in the same transaction. If the update authority is a launchpad program or a multisig, the lock has to be signed from there, because the panel can only build a transaction for the wallet you connect.

Questions & answers

How do I check if a Solana token is immutable?

Paste the mint address into the panel; no wallet is needed. The Metadata row shows Mutable or Immutable, and the Update authority row shows who could edit it while it is mutable. Explorers show the same is-mutable flag on the token's metadata tab, and RugCheck reports Mutable metadata as a warning.

Can I undo making my token immutable?

No. The Metaplex Token Metadata program accepts the is-mutable flag going from true to false and rejects the reverse. Once locked, no name, symbol, URI, creator or royalty change is possible for anyone, including the update authority and Metaplex themselves. Make every edit you need first, then lock.

Does making metadata immutable revoke the update authority?

Not literally. The update authority stays set to the same address because Metaplex requires a key there, but it loses every power except verifying collection membership. That is the correct end state; there is no way to set the update authority to nobody, and sending it to a burn address gains nothing over an immutable flag.

Does this fix a mutable warning on RugCheck or DEX Screener?

Yes for the metadata item. RugCheck reads the same is-mutable flag from the chain and clears the warning after the transaction confirms and its cache refreshes, usually within minutes. Mint authority and freeze authority warnings are separate and need the revoke tools.

Will my logo still be editable after locking?

The URI is locked, so wallets will always load the same link. Whether the image behind it can change depends on the host: IPFS and Arweave links are content-addressed and fixed, while a file on your own server can be replaced. If your URI points to a mutable server, upload the JSON to IPFS and update the URI before locking.

How much does it cost to make a token immutable?

A flat 0.02 SOL SOLTidy fee in the same transaction, plus the network fee of about 0.000005 SOL. No account is created or resized, so there is no rent to pay and nothing is refunded. Checking any token's mutability is free and needs no wallet connection.

Is it safe to connect my creator wallet to this tool?

Yes. It is non-custodial: the transaction is built in your browser and signed by your wallet, and it contains exactly two instructions you can read before approving, a Metaplex UpdateMetadataAccountV2 with your existing fields and is-mutable set to false, and the fee transfer. It never moves tokens, never changes the mint and never asks for approvals.

Is there a fee?

Making token metadata immutable costs a flat 0.02 SOL SOLTidy fee, paid in the same transaction, plus the Solana network fee of about 0.000005 SOL; checking whether a token is immutable is free.

Guides that go deeper

Built and maintained by Jacob, a Solana trader who uses these tools daily. Content reviewed . Every transaction is built in your browser and signed in your own wallet — see the terms for fees.