Your smart contract
has a vulnerability.
Find it before
hackers do.
AI-powered smart contract audit in 60 seconds. Detects reentrancy, overflow, access control, front-running, and more — with severity ratings, remediation steps, and code fix examples.
Free for Solidity, Rust, Move, and Vyper.
500+ contracts audited · $2M+ in vulnerabilities found · Powered by Blockhertz
✦Audit Your Contract FreeNo signup required · Results in 60 seconds
Or open the full auditor →⚠ Contracts deployed without audits are exploited within 48 hours on average.
Try it right now. Free.
Paste any contract. Results in 60 seconds.
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Your audit report will appear here
Paste a contract on the left and click Audit Contract to begin
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What our AI detects
Trained on thousands of real exploits and CVEs across EVM-compatible chains.
Reentrancy Attacks
The #1 cause of DeFi hacks. $600M+ stolen via reentrancy.
Access Control Issues
Missing modifiers that let anyone call privileged functions.
Integer Overflow
Arithmetic that wraps around causing unexpected behavior.
Front-Running
MEV bots that exploit transaction ordering.
Gas Inefficiencies
Patterns that waste user gas and increase transaction costs.
Logic Vulnerabilities
Business logic errors specific to your contract's design.
Every finding includes a severity rating, explanation, and step-by-step fix with code examples.
This is what you get in 60 seconds
Real output from a real audit.
Risk Score
Your audit will look exactly like this. In 60 seconds.
Simple, transparent pricing
Pay for what you use. No subscriptions required.
Starter
$19
one-time purchase
$3.80 per audit
- 5 audit credits
- Full findings report
- Critical/Medium/Low severity
- How to fix guidance + code examples on all High, Medium, Low, and Gas findings
- Gas optimization suggestions
- TXT export
- 90-day credit validity
Pro
$49
one-time purchase
$2.45 per audit
- 20 audit credits
- Everything in Starter
- PDF export
- Priority processing
- Audit history (30 days)
- 180-day credit validity
Unlimited
$99
/month
Unlimited audits
- Unlimited audit credits
- Everything in Pro
- AI Fix suggestions
- API access
- Team seats (3)
- Priority support
- Audit comparison
All plans include: Full AI analysis · Severity rankings · Export reports · No hidden fees
Secure checkout via Lemon Squeezy · 7-day money-back guarantee
We don't just find it.
We fix it.
Most audit tools leave you with a list of problems and no path forward. Blockhertz is different — our team of senior blockchain engineers can fix every vulnerability we find, same day.
Get Emergency Fix Support
Tell us what was found. We'll respond within 2 hours.
Or: contact@blockhertz.com
Common questions
No — and we're transparent about that. Our AI pre-audit catches a wide range of common vulnerability patterns instantly. It's designed to be your first line of defense before a manual audit, not a replacement for one. Think of it as spell-check before a professional editor.
Your contract code is sent securely to Anthropic's Claude API for analysis and is not stored permanently. We do not train on your code or share it with third parties. See our privacy policy for full details.
Currently: Solidity, Rust, Move, and Vyper. We're adding support for Cairo (Starknet) and Ink! (Polkadot) in Q3 2026.
Our AI detects the majority of common vulnerability patterns instantly. For mission-critical contracts, we recommend combining AI audit with a manual review.
Starter credits (5) expire after 90 days. Pro credits (20) expire after 180 days. Unlimited plan credits reset monthly.
Yes — useful when testing fixes. Each run uses one credit. Pro and Unlimited plans include audit history so you can compare runs.
Start auditing.
Right now. Free.
No signup. No credit card.
Just paste your contract.
Or choose a plan and run unlimited audits
↑ See pricing above ↑