Back to All Tools

Data Converters

23+ free data format converters. Convert CSV, JSON, XML, YAML, Excel, and more instantly.

About the Data Format Converters

NKable's data format converters move tabular and structured data between CSV, TSV, JSON, XML, YAML, TOML, SQL and Excel. Each converter previews the parsed result before you download, so a malformed delimiter or wrong header row is caught before it reaches your database.

Pick a data format converter for whatever pairing you are stuck with: a client sends CSV and your API wants JSON, a config file is TOML and the deploy script reads YAML, an export arrives as XLSX and the import needs plain CSV. Each converter handles one direction properly rather than half-handling many.

Parsing is the part that goes wrong in practice, so every converter shows the parsed result before you commit — quoted commas, embedded newlines, a header row that was actually data, numbers that should have stayed strings. Seeing the table first is cheaper than debugging a bad import later.

Most of these run in your browser and never send data anywhere. The Excel and large-file converters use the server because the parsing libraries are too heavy to ship to a phone; each tool says which applies.

How to use the Data Format Converters

  1. Pick a data format converter. Choose the pairing you need from the list.
  2. Add your data. Paste it in. Most converters work from pasted text; a few also accept a file.
  3. Check the preview. Confirm the parsed result looks right before you take it.
  4. Copy the output. Copy the result, or download a file where the converter offers one.

Data Format Converters features

  • CSV, TSV, JSON, XML, YAML, TOML, SQL and Excel conversions
  • Parsed preview before you download
  • Automatic type detection for numbers and booleans
  • Configurable delimiters, root elements and row names
  • Paste-in or file-upload input
  • No account, no file limit and no watermark

Frequently asked questions

Which formats can I convert between?

CSV, TSV, JSON, XML, YAML, TOML, SQL insert statements and Excel workbooks, in both directions for most pairings.

Is my data sent to a server?

Most converters run entirely in your browser. The Excel and large-file converters use the server; each tool states which applies.

Are numbers and booleans detected automatically?

Yes. Converters that output JSON or YAML infer numbers, booleans and nulls rather than quoting everything as strings.

Can I convert a file rather than pasted text?

Yes. Every converter accepts a file upload as well as pasted input.

What if my CSV uses semicolons?

Delimiter is configurable. Semicolon and tab separated files are handled as well as commas.