OPENVIST TOOLS · FREE TO USE
CSV ↔ JSON Converter
Convert CSV records to JSON or flat JSON objects to CSV, with optional column selection.
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.
CSV values remain strings. For JSON to CSV, missing fields and null become empty cells. Selected values must be scalar; nested arrays and objects are rejected. Formula-like string cells are prefixed with an apostrophe by default.
Load an example or provide your input to begin.
Result
Downloads contain your processed data. Review them before sharing.
What this tool does
CSV values remain strings. For JSON to CSV, missing fields and null become empty cells. Selected values must be scalar; nested arrays and objects are rejected. Formula-like string cells are prefixed with an apostrophe by default.
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
Move a small table into JSON while preserving identifiers with leading zeros.
Example input
id,name 001,Alpha 002,"Beta, Inc."
What to expect
CSV → JSON keeps "001" and "002" as strings. JSON → CSV has its own scalar-value and spreadsheet-safety rules.
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.