Input and result
Use TEXT input to produce an on-screen result. Validate pasted JSON syntax directly in your browser and receive a clear valid or invalid result without changing the original data.
All toolsJSON Validator · Free online tool
JSON Validator online
Validate pasted JSON syntax directly in your browser and receive a clear valid or invalid result without changing the original data.
Local processingNo uploadNo watermark
Browser processing ready
Three simple steps
How to use the JSON Validator tool
No software, signup or hand-holding required.
01
Enter your data
Paste the text or structured data you want to process.
02
Adjust and process
Choose useful settings, then let your browser create the result.
03
Review the details
See the result without sending your data anywhere.
What to expect
A focused JSON Validator workflow
Practical limitation
The current workspace accepts up to 1 file, with a 100 MB limit per file.
Common questions
Good to know
Answers specific to this tool and its current capabilities.
What does the JSON Validator check?+
It parses the complete input and reports whether the syntax forms valid JSON.
Does valid JSON guarantee the data matches my schema?+
No. Syntax validation does not enforce application-specific field names, types or JSON Schema rules.
Are trailing commas accepted in JSON?+
No. Standard JSON does not permit trailing commas, comments or unquoted property names.