https://jsokit.com/blog/tags/validator/ Recent content in Validator on JsonKit Blog Hugo en © 2025 JsonKit Tue, 10 Mar 2026 11:57:25 +0000 https://jsokit.com/blog/posts/json-validator-implementation-from-syntax-parsing-to-error-location/ Tue, 10 Mar 2026 11:57:25 +0000 https://jsokit.com/blog/posts/json-validator-implementation-from-syntax-parsing-to-error-location/ JSON Validator Implementation: From Syntax Parsing to Error Location When debugging API responses, the most frustrating thing is JSON format errors. The console throws Unexpected token with just a character position—you have to count characters one by one to find the issue. Let’s implement a JSON validator that pinpoints errors to exact line and column numbers. The Problem with JSON.parse Errors JSON.parse is a native browser method with excellent performance, but its error messages aren’t user-friendly: