Do these 3 things before closing this tab:
1Fix the driver behind crashes, sound loss and screen glitches2Repair Windows errors before they cause bigger problems3Scan for outdated or missing drivers - takes under a minuteTo revoke a token approval left over after a presale, check the wallet address and every network you used, identify each token and spender, then submit an on-chain revoke transaction for allowances you no longer need. Disconnecting a site does not revoke an approval, and revocation costs gas.
What a token approval means—and what it does not
A token approval, also called an allowance, gives a smart contract permission to move a specified token from your wallet. It is separate from connecting your wallet to a website: disconnecting stops that site from using the wallet connection, but it does not remove an on-chain allowance. MetaMask explains the distinction.
As an Amazon Associate I earn from qualifying purchases.
A presale may involve a purchase contract, while claiming, swapping, or later trading tokens may involve other contracts. Do not assume that a connection created an allowance—or that a particular presale contract is the spender. Check your own transaction history and the token and spender shown by an approval checker.
What’s actually slowing this PC down?
Pick the symptom - the matching free tool is one click away.
How to find and revoke approvals
- Choose a checker or explorer. Start with the approval-management guidance and linked options from ethereum.org or the wallet and explorer options described by MetaMask. Type the official domain carefully or use a bookmark.
- Check the wallet address and network. Search your address or connect the wallet, then select each network used for the presale and any related claim, swap, or listing activity. Approval results are chain-specific; a clean result on one network says nothing about other networks.
- Inspect each entry. Review the token, spender or contract, and allowance amount. Compare these with your transaction history and decide whether you still need the permission. Avoid revoking an allowance used by an active position or a planned action.
- Submit the revoke transaction. For an ERC-20 token, revoking sets the allowance to zero; NFT approvals use a disabled or false approval state. Check the network and transaction details in your wallet before signing.
- Wait for confirmation and verify. Revocation is an on-chain transaction and incurs the network’s gas fee. After it confirms, refresh or reconnect the checker and confirm the allowance changed or disappeared.
- Repeat for each relevant network. If you later use the same token and contract again, you may need to approve it again.
Which approval-checking route should you use?
Wallet features, block explorers, and third-party approval services are different ways to inspect and manage allowances. Check that the option supports your network and wallet, lets you inspect the spender, and shows the transaction before you sign. Some services allow an address search without connecting a wallet; availability varies by service.
#1 Best Overall
- Effortlessly build your crypto portfolio via the all in one Ledger Wallet app: buy, sell, send, receive, swap, stake and more across popular blockchains. 15,000+ coins & tokens in a single dashboard. Keep a close eye on the market. Compare service providers. Track performance. Get timely alerts. Build your portfolio with confidence.
- Enjoy Bluetooth connectivity, iOS access, and hours of battery use with this mobile-first, secure backup signer. Freedom you can depend on.
- Genuine Check: confirm your signer is authentic during setup with the Ledger Wallet app.
- Protect your signer: keep it in mint condition at all times with a bespoke Pod or Case to avoid scratches and everyday wear and tear.
MetaMask says its Portfolio revocation feature is available on Ethereum Mainnet, Polygon, and BNB Chain. Network support and interface details can change, so check the current options in MetaMask’s approval guidance. Do not treat any checker as a guarantee that a wallet, contract, or project is safe.
Quick Recap
Rank #4
- Dual-chip architecture for maximum protection: The next-gen, fully auditable TROPIC01 chip works alongside a certified EAL6+ Secure Element—completely NDA-free—to deliver radically transparent, industry-leading defense against physical attacks.
- Quantum-ready security: Get protection against future threats with the first-ever hardware wallet designed with quantum-ready architecture.
- See every detail with confidence: Our largest high-resolution color touchscreen makes it easy to navigate your assets, review transactions and manage your coins with clarity.
- Wireless freedom with encrypted Bluetooth control: Manage, buy, swap and stake securely using Trezor Suite on desktop or mobile. Qi2-compatible wireless charging keeps your Trezor powered up. No cables required—security meets convenience.
- Works seamlessly with Android, iOS and desktop: Connect wirelessly or via USB-C to your phone or computer. Manage your crypto anywhere with our companion Trezor Suite app.
Rank #3
- UNPARALLELED SECURITY: Protect your assets with Trezor Safe 5's NDA-free EAL 6+ Secure Element, offering robust defense and complete transparency.
- EFFORTLESS NAVIGATION: Experience seamless crypto management with the vibrant color touchscreen, designed for intuitive and user-friendly interactions.
- ENHANCED USER EXPERIENCE: Enjoy tactile confirmation with Trezor Touch Haptic Engine, making each interaction precise and engaging.
- SUPPORTS 1000s OF COINS & TOKENS: Securely handle thousands of assets, including Bitcoin, Ethereum, and more, all in one wallet.
- EASY ASSET MANAGEMENT: Monitor and transact seamlessly with Trezor Suite, our user-friendly desktop and mobile app
Rank #2
- Proven security at scale: Over 9 years and millions of cards issued with no known remote hacks, while military‑grade EAL6+ security keeps your private keys locked inside the chip. Your cryptocurrencies stay strongly protected from online attackers.
- Tap once to manage your entire crypto wallet across 90 blockchains - no USB cables or Bluetooth, no batteries, no setup. Access 14,100+ coins & tokens, DeFi, NFTs, and staking instantly from your phone
- Smart backup: Use your second Tangem Wallet as your Backup keys with end‑to‑end encryption; no more papers, pictures. If one card is lost, the remaining can still restore full access, with an optional seed phrase available for advanced users.
- Engineered to last up to 25 years: Waterproof (IP69K), shockproof and tested for extreme temperatures from −25°C to 50°C. A durable cold wallet with long‑term protection and independently audited security.
- Trusted by 6 million users worldwide - buy, sell, swap, stake, and spend cryptocurrency directly. The secure offline storage wallet designed for how people actually use crypto wallets
What revoking an approval can—and cannot—do
- It can stop future use of that allowance. The change applies to the permission you revoke, after the transaction is confirmed.
- It cannot undo a completed transfer. Revoking does not recover tokens already moved or reverse a transaction. It is also not a fix for a compromised recovery phrase or private key. See Revoke.cash’s explanation of token approvals.
- It does not withdraw deposited or staked tokens. Revoking an allowance does not itself remove tokens already deposited in a contract. However, adding tokens or using the contract again may require a new approval, as described in Revoke.cash’s FAQ.
- It requires a transaction signature and gas. Confirm the network and spender in the wallet prompt; do not sign a transaction you do not understand.
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
