Check Bash script syntax, security and quality
Free online bash checker and shell script validator. Paste a script for instant ShellCheck-style findings on syntax, quoting and security. No signup.
Overview
Paste or upload a Bash script to find syntax mistakes, unsafe commands, quoting errors, portability problems and missing safeguards. The instant browser check highlights likely issues as you type, while the deeper review explains risks and suggests practical fixes.
Private static analysis
Bash Checker treats every script as text and never executes it. You do not need an account. Likely secrets are detected before submission, and recent reports remain in your browser so you control local history.
What the report includes
Each report covers syntax, security, error handling, portability, dependencies, input validation and maintainability. Findings include severity, line references, explanations and suggested changes. Reports can be shared or exported for review.
Learn while fixing
Use the ShellCheck rule reference, common Bash error library, production pitfall guides, comparisons and step-by-step how-to articles to understand why a warning occurs and when an apparent problem may be intentional.