Solana Transaction Security

See what you're
actually signing

A browser extension that intercepts every Solana transaction before your wallet signs it — decoded, simulated, and explained in plain English.

See how it works
Transaction intercepted · jup.ag
$3.2B
Lost to Solana wallet drains and phishing attacks in 2024
< 2s
For SignSafe to decode, simulate, and explain any transaction
100%
Of transactions analyzed before your wallet popup ever appears
How it works

Between the dApp
and your wallet

SignSafe wraps your wallet's sign function. You never change how you use dApps — it intercepts silently, analyzes, and shows you what's coming.

01
⚡

Intercept

When any dApp calls signTransaction, SignSafe catches it before the wallet popup opens.

02
🔬

Simulate

The transaction runs through Solana's RPC to reveal exact balance changes, token flows, and every program called.

03
🧠

Explain

Automated analysis translates raw simulation traces, flags risk signals, and returns a clear verdict — proceed or block.

The problem

Wallets show one line.
We show everything.

Phantom says "Swap." What's actually inside? Three instructions, two program calls, and a hidden SOL transfer to an address you've never seen.

The Crypto Copilot Chrome extension stole from thousands of Solana traders in 2024 by injecting a hidden fee into every swap. The wallet UI showed nothing unusual. SignSafe would have flagged it immediately.

Raw transaction — what wallets receive
AQAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAABjeida13AjgPaUEU9xrh1iQMwxZC7QDdvSfg73oxQff7...mWjK8pLqRt2vXnZs...
↓
Instructions3 detected
Instruction 1Raydium swap · 1.5 SOL → USDC
Instruction 2Transfer 0.015 SOL → unknown
Instruction 3Drain all token approvals
VerdictDANGER — Block this
Risk levels

Three verdicts.
Zero ambiguity.

Every transaction gets a clear verdict based on simulation output, program reputation, and automated analysis.

Safe

All clear

Recognized programs, expected balance changes, simulation succeeded with no anomalies.

Jupiter swap on known pair
SOL transfer to saved address
Metaplex NFT mint
Review

Proceed with care

Unknown programs, first interactions, or large SOL movements that warrant a second look.

Program deployed < 7 days ago
Large SOL movement (> 1 SOL)
First interaction with a contract
Danger

Block immediately

Drainer patterns, hidden transfers, unlimited token approvals to unverified programs, or simulation errors.

Token drain to unknown wallet
Hidden instructions after swap
Unlimited token approval request
FAQ

Critical questions.
Clear answers.

Real questions from people evaluating whether to trust this extension.

Fair question. The interception technique is the same. The difference is verifiable: SignSafe is fully open source, every line is on GitHub, and it cannot alter what you sign — only show you what it does. Check the code yourself.

No. Your keys never leave your wallet. SignSafe only sees the unsigned transaction the dApp hands to your wallet — the same data the dApp itself already has.

Two calls, both visible in the source. The transaction goes to Solana's public RPC for simulation. The simulation output — instruction set, balance deltas, program invocations — is passed to the analysis engine. No keys, no wallet addresses, no browsing history.

Wallet warnings are good — keep them on. SignSafe intercepts before the popup opens; most wallet warnings fire inside it. Wallet services rely on catalogued threat signatures. SignSafe runs live on-chain simulation against every transaction — known or not. A zero-day drainer with no prior history gets flagged the moment simulation shows tokens draining.

On-chain simulation is ground truth — the execution trace cannot misrepresent what the transaction does. The analysis layer correlates that output against risk heuristics and behavioral patterns. Occasionally conservative. Never a guarantee. The final decision is always yours.

Any browser wallet injecting window.solana — Phantom, Backpack, Solflare. Hardware-only setups and mobile in-app signers are not currently supported.

Free tier includes 5 automated scans per day — no card required. Pro plan unlocks unlimited scans and advanced risk breakdowns starting at $39/mo.

Private beta. First 10 arrivals get immediate access. Join below.

Join the beta

Stop signing things
you don't understand.

Early testers get private builds, direct founder updates, and first access when SignSafe is ready for public release.

Private beta · Early access builds · Solana wallet power users first