Json Validator Formatter
Validate and reformat JSON while preserving original numeric tokens and object-key order.
Result for the values shown.
Calculations run in your browser.
What to enter
| Input | Meaning and units |
|---|---|
| JSON input | Text is processed in your browser. Maximum input: 1 MiB of UTF-8 text. |
| Indent | integer 0..8 |
Understanding your result
The output applies the selected format or address convention. Encoding is not encryption; a valid address representation does not establish availability, reachability or security.
Common mistakes
- Using a different alphabet, padding, base, delimiter or address-prefix convention than the tool expects.
Check your calculation
- Where a reverse operation exists, round-trip a short known example. Compare structural results with the reference example rather than executing decoded text.
Calculation checks, sources and review limits
Is this JSON valid, and how can I format it without rounding its large numbers?
Validate and reformat JSON while preserving original numeric tokens and object-key order.
Common uses
- Validate and reformat JSON while preserving original numeric tokens and object-key order.
How it works
Validate JSON syntax, then adjust whitespace outside string literals. Original number tokens, escapes and duplicate key occurrences are preserved, so large integers are not rounded. Duplicate keys remain ambiguous to consumers; review them before use. Input is limited to 1 MiB and nesting to 100 levels.
Worked example
Enter JSON input: {"a":1}; Indent: 2. The result is Valid: true; Formatted: { "a": 1 }.
FAQ
Is this JSON valid, and how can I format it without rounding its large numbers?
Validate JSON syntax, then adjust whitespace outside string literals. Original number tokens, escapes and duplicate key occurrences are preserved, so large integers are not rounded. Duplicate keys remain ambiguous to consumers; review them before use. Input is limited to 1 MiB and nesting to 100 levels.
What assumptions and limits apply?
Native JS JSON.parse loses large integer precision and duplicate object keys. Either detect/reject or use lossless parser; surface limits.