Components All New MacOS Windows Linux iOS
Examples Mac & Win Server Client Guides Statistic FMM Blog Deprecated Old


Checks if JSON text is valid.

Component Version macOS Windows Linux Server iOS SDK
JSON 6.3 ✅ Yes ✅ Yes ✅ Yes ✅ Yes ✅ Yes
MBS( "JSON.IsValid"; JSON )   More


Parameter Description Example
JSON The JSON text to parse. "[1,2,3]"


Returns 1, 0 or error.


Checks if JSON text is valid.
This parses the JSON text and returns 1 on success or 0 on failure.

This checks if the given text is a valid JSON fragment and can be e.g. added as value to a JSON object or array. So this returns 1 for proper formatted boolean, number and text pieces, too.


Checks validity:

MBS( "JSON.IsValid"; "[1,2,3]" )

Example result: 1

Checks with error:

MBS( "JSON.IsValid"; "[1,hello,3]" )

Example result: 0

Check number:

MBS("JSON.IsValid"; 123)

Example result: 1

See also

Release notes

  • Version 12.5
    • Fixed a problem with JSON.IsValid accepting garbage characters behind parsing.

Blog Entries

This function checks for a license.

Created 23th June 2016, last changed 11st October 2022

JSON.Import.Work - JSON.JSONPatch.ApplyPatch