How to use the free code checker
Copy and paste your code into the editor.
Select your language from the dropdown.
Click the Check code button.
Use the results to improve your code.
Get code security right from your IDE
This free code checker can find critical vulnerabilities and security issues with a click. To take your application security to the next level, we recommend using Snyk Code for free right from your IDE.
- File I/O corruptions
- API contract violations
- Null dereferences
- Process/threading deadlock problems
- Incorrect type checking
- Expression logic mistakes
- Regular expression denial of service
- Invalid time/date formatting
- Resource leaks
- Missing input data sanitization
- Insecure password handling
- Protocol insecurities
- Indefensive permissions
- Man-in-the-Middle attacks
- Weak cryptography algorithms
- Information disclosure
- Code injection
- SQL injection
Code security powered by Snyk Code
This free web based code checker is powered by Snyk Code. Sign up now to get access to all the features including vulnerability alerts, real time scan results, and actionable fix advice within your IDE.Learn about Snyk Code
Human-in-the-Loop Code Checker
Snyk Code is an expert-curated, AI-powered code checker that analyzes your code for security issues, providing actionable advice directly from your IDE to help you fix vulnerabilities quickly.
Scan and fix source code in minutes.
Fix vulns with dev friendly remediation.
Integrated in IDE
Find vulns early to save time & money.
Integrates into existing workflow.
More than syntax errors
Comprehensive semantic analysis.
AI powered by people
Modern ML directed by security experts.
Automatically scan every PR and repo.
CI/CD security gate
Integrate scans into the build process.