JSONLint
FreePaste JSON, validate it, and pretty-print it
Best for json · validate · format
Toolora score91/100
Our own editorial score, not public reviews.
Strengths
- Validate JSON
- Pretty-print and compact
Skip if
you need a team plan, audit logs, or a phone number to call
JSONLint checks whether a JSON blob is valid. Paste a payload, see the error line, and format it so you can read the structure.
Key features
- Validate JSON
- Pretty-print and compact
- Error line numbers
- Web; no account
Why it is on Toolora
We list JSONLint for people who need json · validate · format. Skip it if you need a team plan, audit logs, or a phone number to call.
Closest alternatives on Toolora: Regex101, RegExr, Notion.
Try instead
CompareAlso covers debug.
Also covers debug.
Same kind of tool, different trade-offs.
JSONLint
Free