Manifest Checker
Validate PWA Manifest parameters
DeveloperFreeNo Signup
Loading tool...
About Manifest Checker
Easily debug why your PWA is not triggering the 'Install App' prompt natively. This checker instantly parses your manifest.json and audits it against W3C and Chromium standards, verifying missing 192x192/512x512 icons, 'standalone' display properties, theme masks, and more.
Manifest Checker Features
- Upload JSON files or Paste raw strings securely
- Scores manifest based on strict installability heuristics
- Verifies exact icon dimension requirements (192, 512, maskable)
- Validates display mode and start URL variables
More Developer Tools
Explore all 46 other developer tools available on Generatr
1099-NEC GeneratorA/B Testing CalculatorAPI Key GeneratorBar Chart GeneratorBode Plot GeneratorBOM CheckerBox GeneratorBSOD CheckerChart GeneratorCron Expression GeneratorCSS Clip-Path GeneratorDeeplink TesterDiscord Timestamp GeneratorEDU Email GeneratorEmbed Code GeneratorFake User Profile GeneratorGitHub User Profile ViewerGlobal Ping TesterHacker News Top StoriesHeat Map GeneratorHistogram GeneratorHTML Table GeneratorHTTP Status Code LookupiFrame GeneratorImage Link GeneratorIP Geolocation LookupJSON Placeholder API TesterLaTeX Table GeneratorLine Graph GeneratorLong Tail Keyword Generator
View all 46 developer toolsShare this tool: