JSON to TSV Converter
Handle Million Rows in Your Browser

Convert JSON files to TSV (tab-separated) format instantly in your browser. Paste JSON text directly or upload a .json file. Powered by DuckDB-WASM, no server upload required.

Drag & drop your file here, or browse

Accepts: .json (up to 500 MB)

Your data stays in your browser. By using this tool, you agree to our Terms and Privacy Policy.

How to Convert JSON to TSV

Choose the "Upload File" tab and drag & drop your .json file, or switch to the "Paste Text" tab and paste your JSON data directly.

The tool reads your JSON using DuckDB-WASM. Supported formats: Array of objects ([{...}, {...}]) and NDJSON (one object per line).

Preview the TSV output with column headers and tab-separated data.

Click the download button to save the TSV file.

Features

100% Browser-Based: Your data never leaves your device. All conversion happens locally using WebAssembly — no server upload, no privacy concerns.
Paste or Upload: Paste JSON directly into the text area or upload a .json file. Perfect for quick tests or batch conversions.
Streaming for Large Files: For files over 150MB, streaming mode writes TSV directly to disk, avoiding browser memory limits. Handles million-row datasets.

JSON vs TSV: What's the Difference?

JSON (JavaScript Object Notation) represents data as key-value pairs, commonly used for Web APIs and applications. TSV (Tab-Separated Values) is a simple tab-delimited text format widely used for data exchange and scientific data pipelines.

	JSON	TSV
Structure	Key-value pairs (nestable)	Flat table (rows × columns)
Delimiter	N/A (structured text)	Tab (\t)
Data types	Strings, numbers, booleans, null	Everything is a string
Readability	Easy to consume in code	Columns align visually for easy reading
Common use	Web APIs, config files, NoSQL	Data exchange, bioinformatics, linguistics

Benefits of Converting JSON to TSV

Opens instantly in spreadsheets and text editors — columns align neatly with tab separation
No comma conflicts — TSV uses tabs as delimiters, so commas in data fields are never an issue
Data pipeline integration — TSV is the standard format in bioinformatics, linguistics, and scientific workflows

Frequently Asked Questions

Is my data uploaded to a server?

No. Your file never leaves your browser. All processing happens locally using WebAssembly. No data is sent to any server.

Is it free?

Yes, this tool is completely free with no row limits.

What JSON structures are supported?

This tool supports JSON arrays of objects (e.g., [{"id": 1}, {"id": 2}]) and NDJSON (newline-delimited JSON). Each object becomes a row, and keys become column headers. Wrapper objects like {"data": [...]} are not supported — extract the inner array first.

Can I convert a large JSON file with millions of rows to TSV?

Yes. This tool uses DuckDB-WASM to process files entirely in your browser. It handles millions of rows without issues. For files over 150MB, streaming mode writes directly to disk to avoid browser memory pressure.

Can I paste JSON directly instead of uploading a file?

Yes. Switch to the "Paste Text" tab and paste your JSON data directly. The tool validates and converts it instantly. For pasted text, the limit is 10MB — use file upload for larger data.

What is TSV and how is it different from CSV?

TSV (Tab-Separated Values) uses tab characters to delimit data fields, while CSV uses commas. TSV avoids issues with commas in data fields (such as addresses or descriptions) and is widely used in bioinformatics, linguistics, and data exchange.

What is the file size limit?

The input limit is 500MB for file upload. For pasted text, the limit is 10MB. For files over 150MB, streaming mode writes directly to disk to avoid browser memory issues.

What is NDJSON?

NDJSON (Newline Delimited JSON) is a format where each line contains a single JSON object. It's commonly used for log files and streaming data. Example: {"id": 1}\n{"id": 2}. This tool converts NDJSON to TSV just like a regular JSON array.

Can I clean up or filter data before converting?

This page is a dedicated conversion tool. For data cleansing before conversion, try LeapRows — no sign-up required.

What browsers are supported?

Any modern browser with WebAssembly support: Chrome, Firefox, Edge, Safari (14+).