Flattening Nested Object Structures
Real-world JSON often contains nested sub-objects (e.g. `user: { address: { city: 'Boston' } }`).
A recursive flattening function concatenates nested keys with dot notation (e.g. `user.address.city`), transforming arbitrary hierarchical trees into clean 2D tabular rows.
Generating Instant Client-Side Downloads
Once the CSV string is generated, prefixing a UTF-8 Byte Order Mark (`\uFEFF`) ensures Microsoft Excel opens international characters (accents, umlauts) correctly without garbling characters.
Step-by-Step Tutorial
Paste JSON Array
Paste your JSON data into the converter. Syntax errors are caught and highlighted automatically.
Preview Tabular Grid
Review auto-generated column headers and flattened nested properties in an interactive data table.
Export CSV / Excel File
Download your formatted spreadsheet file directly to your disk with UTF-8 BOM encoding.
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Frequently Asked Questions
Why does Excel show weird characters when opening CSV files?
Excel defaults to ANSI encoding unless the file starts with a UTF-8 Byte Order Mark (BOM). DocSwift automatically prepends the BOM to ensure flawless display.
Can I convert arrays of objects with differing keys?
Yes! The parser performs a union of all unique keys across all objects in the array, inserting empty cells where specific keys are omitted.