A transparent explanation of how we analyze Solidity contracts for gas inefficiencies and generate optimized versions — and where our limitations are.
Try Gas Optimizer FreeSolidity
Only language
15-45%
Average gas savings
60s
Analysis time
Free
Always
Six stages, from paste to optimized report.
Paste any Solidity smart contract. We accept complete files or individual functions. The contract is analyzed in-session only — never stored permanently.
The contract is scanned for known gas-inefficient patterns including: storage vs memory variable misuse, redundant operations, loop inefficiencies, uint256 vs smaller uint packing issues, and expensive opcode usage.
An AI model analyzes the contract logic to identify deeper optimization opportunities that pattern matching alone misses — including storage layout reorganization, function visibility optimization, and calldata vs memory parameter choices.
For each optimization found, we estimate the gas savings in units and percentage. Estimates are based on EVM opcode costs at current Ethereum gas prices. Actual savings vary by network conditions.
We generate a complete optimized version of your contract with all suggested changes applied. The optimized code is annotated with comments explaining each change and its gas impact.
A complete gas optimization report is generated showing: original vs optimized gas estimates, list of all optimizations applied, estimated savings per function, and export as PDF.
14 core patterns, spanning static detection and AI reasoning.
| Pattern | Gas Impact | Detection |
|---|---|---|
| Storage reads in loops | High | Pattern |
| Redundant storage writes | High | Pattern |
| uint8 vs uint256 | Medium | Pattern |
| Events vs storage | Medium | AI |
| Function visibility | Medium | AI |
| Calldata vs memory | Medium | AI |
| Dead code removal | Low | Pattern |
| Constant variables | Low | Pattern |
| Immutable variables | Medium | Pattern |
| Short-circuit evaluation | Low | AI |
| Struct packing | High | AI |
| Mapping vs array | Medium | AI |
| Custom errors vs strings | Low | Pattern |
| Unchecked math blocks | Medium | AI |
Solidity only
Gas optimization is EVM-specific — this tool targets Ethereum, Polygon, BNB Chain, Avalanche, Arbitrum, Base, and every other EVM-compatible chain.
The Blockhertz AI Gas Optimizer is a fast first-pass optimization tool. It surfaces the majority of common wins but does not replace hand-tuned gas profiling for production contracts.
Use as a first-pass optimization tool during development. For production contracts handling significant value, combine with manual gas profiling using Hardhat Gas Reporter or Foundry's gas tracking.
| AI Optimizer (Free) | Manual Profiling | |
|---|---|---|
| Time | 60 seconds | Hours – days |
| Cost | Free | Developer time |
| Best for | Quick wins | Production tuning |
| Misses | Complex patterns | Nothing |
Paste your contract and get a gas-optimized version in under 60 seconds. No signup.
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