OPENVIST TOOLS · FREE TO USE
JSON Validator & Formatter
Validate, format or minify JSON while preserving the original numeric tokens.
Runs locally in your browserMaximum 2 MiB per input. Selected Base64 and SHA-256 files are read as exact bytes. CSV: 20,000 data rows and 100 columns. Text comparisons preserve case, whitespace and Unicode spelling.
Duplicate object keys are rejected. Maximum nesting: 100 levels; maximum values: 100,000. Formatting preserves number and string spellings.
Load an example or provide your input to begin.
Result
Downloads contain your processed data. Review them before sharing.
What this tool does
Duplicate object keys are rejected. Maximum nesting: 100 levels; maximum values: 100,000. Formatting preserves number and string spellings.
Use the example to understand the accepted input. Field names, when applicable, are literal. Inputs are not executed, and Sitemap Inspector never requests the listed URLs.
Worker processing stops after 20 seconds; results are limited to 5 MiB. Initial sitemap XML parsing runs locally before that worker timeout. Inputs and results are cleared when you reload the page. Nothing is executed from the supplied files.
A practical example
Inspect an API response before adapting it in a script. Formatting makes nested values readable without rounding large numeric tokens.
Example input
{"project":"OpenViST","versions":[1,2,3],"large_integer":9007199254740993}What to expect
Valid JSON. The large_integer token remains 9007199254740993 after formatting. Duplicate object keys are errors.
Use the controls above to enter this example. Load example may use a different sample; check the selected operation and options.
Continue with a related recipe
These scripts address related tasks. Review each recipe’s runtime, inputs, recorded tests and limits; its behavior may differ from this browser tool.