The exact line and column where your JSON broke

Paste JSON or a URL. Jsonhalt parses it, and when parsing fails it reports the exact line and column in plain language—not “unexpected token at position 4471.” For URLs it also reports what the server actually sent: the content-type, the body preview, and whether an error response was dressed as a 200.

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What it does

A surprising share of “my API is broken” is an HTML error page with a 200 status and a Content-Type: application/json—and nothing about that is visible until someone looks at the bytes. Jsonhalt is the tool you reach for when you are not sure whether the bug is yours or the API’s.

Parse a URL’s response—status, content-type, body, JSON validity, line and column of the error
Parse pasted JSON text entirely in your browser—nothing is sent to a server
Detect error payloads dressed as HTTP 200 success responses
Report redirect chains, content-type mismatches, and non-JSON bodies
Readable diagnostics using correct terminology: RFC 8259, byte offsets, expected tokens

Who it is for

Intermediate-to-senior developers debugging API integration. You already know JSON syntax; you need precision, not hand-holding. Jsonhalt presents what it found and stops— stating the finding in terms you can act on without being told how.