is-my-json-valid
Extremely fast JSON Schema validator using code generation.
Pricing
Free tier
Flat rate
Adoption
↘CoolingLicense
Open Source
Data freshness
Aging · Jun 8, 2026Overview
What is is-my-json-valid?
is-my-json-valid is a high-performance JSON schema validation tool that generates JavaScript code for faster execution. It's ideal for applications requiring rapid and accurate JSON validation.
Key differentiator
“is-my-json-valid stands out with its unique approach to generating JavaScript code for validation, offering unparalleled speed and efficiency compared to traditional JSON validators.”
Capability profile
Capability Radar
Honest assessment
Strengths & Weaknesses
↑ Strengths
↓ Weaknesses
The tool is primarily designed for JavaScript and lacks robust support or native integration with other languages.
Advanced schema definitions require a deep understanding of JSON Schema specification, which can be complex to set up correctly.
Documentation is lacking detailed examples and explanations for handling more complex or less common validation scenarios.
Since the tool generates JavaScript code, debugging issues in the generated code can be challenging due to the abstraction layer.
Fit analysis
Who is it for?
✓ Best for
Developers needing fast, accurate validation for large volumes of JSON data
Projects where performance is critical and rapid validation is required
Teams working on real-time applications that require strict JSON schema adherence
✕ Not a fit for
Applications requiring complex, dynamic schema changes at runtime
Scenarios where the overhead of code generation outweighs benefits
Cost structure
Pricing
Free Tier
Available
Open source — free to use
Starts at
$0
Model
Flat rate
Enterprise
None
Performance benchmarks
How Fast Is It?
Ecosystem
Relationships
Next step
Get Started with is-my-json-valid
Step-by-step setup guide with code examples and common gotchas.