Web Manifest Validator
Validate Web App Manifest metadata and icon declarations. Runs locally and returns a reviewable report.
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Input is limited to 200000 characters. Results are computed locally and exported as JSON. Up to 200,000 characters. Review the settings before running.
Your result
How to use Web Manifest Validator
- Paste the manifest JSON.
- Run the local validator.
- Review metadata and icon issues and download the report.
Install metadata
The validator checks common install fields and icon declarations. It does not fetch remote icons.