TSV to CSV Converter
Free online TSV to CSV conversion. 100% in-browser, private, no upload. Editable preview, large-file friendly.
Options
How to convert TSV to CSV
Choose your input format and output format above, or paste your TSV data / drop your TSV file into the input panel.
Adjust options if needed — type inference, nested flattening, encoding, sheet selection.
Click Convert (or press Ctrl/⌘ + Enter). The conversion runs instantly in your browser.
Copy the CSV result to the clipboard or download it as a file. Nothing is uploaded.
Why convert TSV to CSV in your browser?
This TSV to CSV converter runs entirely on your device. Your data is never sent to a server, which makes it a great fit for sensitive records, customer lists, financial tables or any private dataset. There are no accounts, no rate limits and no file size caps beyond your own memory.
Because everything happens locally, conversions are instant and work offline once the page is loaded. Large files with hundreds of thousands of rows stay responsive thanks to Web Worker parsing and a virtualized preview. It is a free TSV to CSV online tool that keeps your data private by design.
Frequently asked questions
01Is my data uploaded to a server?
No. Every conversion runs entirely in your browser using JavaScript. Your files and text never leave your device, which keeps sensitive data fully private.
02Which formats are supported?
JSON, Excel (.xlsx/.xls/.xlsm), CSV, TSV, YAML, XML, Markdown tables and SQL INSERT statements — any pair can be converted in either direction.
03Can it handle nested JSON?
Yes. You can flatten nested objects into dotted keys, preserve the original structure, or expand arrays — choose the strategy in the options panel.
04Does it support multi-sheet Excel files?
Yes. The converter reads all sheet names; the first sheet is parsed by default and metadata exposes the full list for advanced workflows.
05Will Chinese / GBK CSV files display correctly?
Yes. Select GBK or Big5 as the input encoding. Real multi-byte decoding is performed via the browser TextDecoder — no garbled characters.
06Is there a file size limit?
There is no hard limit beyond your device's memory. Virtualized rendering and streaming parsing keep things smooth up to hundreds of thousands of rows.