Question 1

Is my data secure? Will it be uploaded to your servers?

Accepted Answer

Absolutely secure. This is a pure front-end tool. All JSON parsing, data processing, and Excel/CSV generation are done locally in your browser. No data is ever sent to our servers.

Question 2

Do I need to format the text into strict JSON beforehand?

Accepted Answer

No. The tool features a smart extraction algorithm. You can directly paste logs or full API responses (even with HTTP headers), and it will automatically scan and extract the largest JSON array it can find.

Question 3

Why do some cells in the exported Excel show a string of JSON text?

Accepted Answer

If a field in your JSON data is a complex array (e.g., `tags: ["a", "b"]`), the tool converts it into a string to prevent data loss. Normal nested objects (e.g., `user.name`) are automatically flattened into separate columns.

Question 4

What if the exported CSV file shows garbled characters in Excel?

Accepted Answer

The CSV file is exported using standard UTF-8 encoding. Some older versions of Excel may fail to recognize UTF-8 when double-clicking directly. We recommend downloading the XLSX format instead, or using Excel's 'Data -> From Text/CSV' import feature.

Question 5

Will pasting massive JSON data crash the browser?

Accepted Answer

We designed this with performance in mind. The input box is optimized for large text, and the preview area only renders up to 50 rows to keep the page smooth. Parsing tens of thousands of rows usually finishes instantly without crashing your browser.

JSON to Excel

Frequently Asked Questions