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Convert nested json array to csv utf-8 in browser

Two-way conversion between JSON arrays and CSV

Input
JSON ArrayJSON
Lines: 0Chars: 0
Output
CSVCSV
Lines: 0Chars: 0

api response json to excel csv without upload

Api response json to excel csv without upload. This tool handles this and related scenarios — including json to csv semicolon delimiter europe format and elasticsearch json response to csv offline — entirely in your browser with no signup or file upload.

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Overview

JSON ⇄ CSV is a two-way tool built for tabular structured data. It can export a JSON array of objects to a standard CSV file, or parse CSV back into a JSON array. The tool follows RFC 4180, automatically escaping commas, newlines and double quotes, and is fully compatible with Excel, Google Sheets, Numbers and other mainstream spreadsheet software.

How to Use This Tool

Step 1 — paste a JSON array (each element is an object representing a record) into the left panel, or click "Sample" to load an example. Step 2 — the tool extracts the union of all object keys as the header row, fills missing fields with empty values, and emits CSV. Step 3 — to go the other way, paste CSV on the right; the first row is treated as the header, and the remaining rows are converted into an array of objects. Step 4 — copy or download the converted result. Nested objects or arrays are serialised as JSON strings inside the cell.

Common Use Cases

Data analysts import back-end API JSON into Excel for pivot analysis; operations teams convert CSV user lists exported from business systems into JSON for bulk CMS imports; QA engineers turn CSV test data into JSON fixtures; product managers exchange back-office reports between CSV and JSON to share with different colleagues; data engineers preview data during ETL debugging.

Technical Details

The tool expects JSON with a top-level array of objects; non-arrays or empty arrays trigger a warning. Values containing commas, double quotes or newlines are automatically wrapped in double quotes and internal double quotes are escaped by doubling. CSV output uses CRLF newlines to stay compatible with the Windows version of Excel. Headers are the union of every object key, preserving the order in which they first appear; numbers and booleans in JSON become strings in CSV and stay strings on the way back.

Privacy & Security

All conversion happens locally. User lists, order data, tracking data and other sensitive tables are never uploaded, so your privacy is fully protected.

References & Standards

Related Tools

JSON FormatterFormat / minify / validate JSON — configurable indent, precise error location, one-click copyJSON ⇄ XMLTwo-way conversion between JSON and XMLJSON ⇄ YAMLTwo-way conversion between JSON and YAMLJSON → TypeScriptGenerate TypeScript interface / type declarations from JSONJSON → Java POJOGenerate Java entity classes from JSON · Lombok / Jackson annotations supported

Frequently Asked Questions

How do I use this tool to convert nested json array to csv utf-8 in browser?

Paste your input into the editor, choose any options, and the result appears instantly. All processing runs locally in your browser.

Is my data safe when using this tool online?

Yes. Every operation runs entirely in your browser. Your data is never uploaded to any server or written to any log.

Is this tool completely free to use?

Yes. This tool is 100% free with no sign-up, no account, no ads and no usage limits.

What formats or platforms support api response json to excel csv without upload?

The tool supports all common formats for this category and works in any modern browser on desktop and mobile. See the editor for live results.

Can I also use this tool to flatten nested json to csv with dot notation keys?

Yes. Paste your content, choose the relevant options, and the result appears instantly. This and all related features run locally in your browser with no file upload.

How do I json lines jsonl to csv converter online using this tool?

Enter or paste your data into the editor, adjust any available options, and the output is generated instantly. All processing is done on your device — nothing is uploaded.