JSON formatter and validator
Read and transform JSON text in this browser without executing code, rendering HTML or uploading input.
Valid JSON only, up to 128 KB, 100 levels and 10,000 values.
Formatting and validation
Formatting adds indentation; minifying removes unnecessary whitespace. Both parse JSON first and preserve its data model.
Deliberate safety limits
The limits reduce browser freezes. Duplicate object keys are resolved by standard JSON parsing, so do not use this tool to audit duplicate keys.
Local text processing
JSON is treated as text and never executed or rendered. Input and output are not sent, stored, added to the URL or shared with analytics.
Frequently asked questions
Does this tool send my input to a server?
No. The tool runs in this browser after you choose to use it. Your pasted content or generated result is not added to URLs, storage, analytics or server requests.
Does a clean result guarantee that an email or account is safe?
No. These tools explain technical clues and reduce routine risk, but they cannot replace your judgment, malware protection, account security controls or advice from a qualified security professional.
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