JSON YAML XML CSV TOML Converter

Online tool supporting bidirectional conversion between JSON, YAML, XML, CSV, and TOML in any combination. Smart format detection for effortless data format migration across API debugging, config conversion, and data import/export.

Sample Data

What You Can Do With It?

Convert Config Formats

Convert JSON configs to YAML for Kubernetes or CI pipeline requirements

Export Data to CSV

Turn JSON arrays into CSV files ready for Excel or BI tools

JSON to TOML

Match config format requirements for Rust, Hugo, or other ecosystems

Switch Formats Quickly

Convert data structures during frontend/backend collaboration with no manual rewrite

Transform API Responses

Convert third-party JSON payloads to required formats to speed up integration

Generate TypeScript Types

Convert a JSON sample into TypeScript interfaces to speed up frontend type declarations

How To Use?

1

Paste Source Data

Paste JSON or other format data into the input area

2

Select Target Format

Choose the desired output format (YAML, TOML, CSV, etc.)

3

Copy or Download

Copy the converted content or download it as the target format file

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Frequently Asked Questions

Supports bidirectional conversion between JSON, YAML, XML, CSV, and TOML in any combination.

Encountered other problems or suggestions? Have a bug or suggestion? Drop us an email.

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The Most Efficient Multi-Format Data Converter in 2026

In real-world development, different systems use different data formats: Kubernetes favors YAML, legacy stacks use XML, analytics needs CSV, modern configs often use TOML, and web APIs standardize on JSON. Converting between them is a daily task, but manual conversion is tedious and error-prone.

In 2026, reliable format conversion is more important than ever — from API JSON to YAML configs, or CSV to JSON for frontends. MeTool's converter supports bidirectional conversion among JSON, YAML, XML, CSV, and TOML. When the chosen source format does not match the content, the tool attempts smart detection to reduce trial and error. Everything runs locally in your browser.

Key Features of MeTool Format Converter

Five-Format Conversion

Convert among JSON, YAML, XML, CSV, and TOML in any direction. Paste source data, pick a target format, and convert.

Smart Detection Assist

If parsing fails with the selected source format, the tool tries to infer a better match so you spend less time switching formats manually.

Structure-Preserving Where Possible

Nested structures map cleanly between JSON, YAML, XML, and TOML. CSV has no nesting — nested objects are serialized as JSON strings with a clear warning.

Local, Fast Processing

Browser-side parsing handles sizable payloads without uploading data to a server.

How to Convert Data Formats with MeTool

  1. Open the Tool: Go to MeTool's format converter — no registration required.
  2. Paste Data: Paste JSON, YAML, XML, CSV, or TOML; if the source format is wrong, try Convert to let detection assist.
  3. Choose Target: Select the output format from the dropdown and click Convert.
  4. Copy: Verify the output and copy to clipboard.