JSON
JavaScript Object Notation. The de-facto standard for REST APIs and modern web services. Convert JSON to YAML, TOML, or XML, or format and minify JSON.
Free Online JSON, YAML, TOML & XML Converter
Convert JSON to YAML, YAML to JSON, TOML to JSON, XML to JSON and more. Format, beautify, minify code and compare text diff. Everything runs 100% in your browser — your data never leaves your device. No signup, no ads, works offline.
100% Private
All processing happens locally in your browser. No data is ever uploaded to any server.
Lightning Fast
No network round-trips. Convert and format large files instantly, right on your device.
No Signup
No accounts, no ads, no tracking. Just open the page and start converting. Works offline.
How to Use DataConv Lite
Follow these simple steps to convert your data between JSON, YAML, TOML, and XML formats. The tool is free and requires no registration.
- Choose a tool: Use the tabs above to switch between Format Convert, Formatter, and Text Diff.
- Select input format: In the Convert tab, pick your source format (JSON, YAML, TOML, or XML) from the dropdown.
- Paste your data: Paste your content into the input textarea. Click Sample to load an example if you want to try it first.
- Select output format: Choose the target format you want to convert to from the output dropdown.
- Convert: Click the Convert button or press Ctrl+Enter to run the conversion instantly.
- Copy or download: Use Copy Output to copy to clipboard, or Download to save the result as a file.
YAML
YAML Ain't Markup Language. Human-friendly config format used by Docker, Kubernetes, CI/CD pipelines, and static site generators. Convert YAML to JSON, TOML, or XML.
TOML
Tom's Obvious, Minimal Language. Used by Rust's Cargo, Python's pyproject.toml, and many modern config tools. Convert TOML to JSON, YAML, or XML.
XML
eXtensible Markup Language. Used in SOAP APIs, RSS feeds, SVG, and enterprise systems. Convert XML to JSON, YAML, or TOML easily.
Common Use Cases
Config file migration
Move configuration between formats when switching tools or frameworks — e.g. JSON config to YAML for a new build pipeline.
API development
Convert JSON API responses to YAML for documentation, or transform XML legacy endpoints to JSON for modern clients.
Code review & diffing
Beautify minified JSON/YAML before review, then use Text Diff to spot changes between two versions of a config or payload.
DevOps & CI/CD
Convert between YAML and JSON for Kubernetes manifests, GitHub Actions, Docker Compose, and CI config files.
Frequently Asked Questions
What data formats does DataConv Lite support?
We support bidirectional conversion between JSON, YAML, TOML, and XML. You can also format and minify each format, and compare two text blocks with line, word, or character-level diff.
Is my data safe when using DataConv Lite?
Yes. All conversion and formatting runs entirely in your browser using JavaScript. Your data never travels over the network and is never stored on any server.
Do I need to install anything to use DataConv Lite?
No. DataConv Lite works in any modern web browser. You can even install it as a Progressive Web App (PWA) for offline use.
How do I convert JSON to YAML?
Paste your JSON in the input box, select "JSON" as the input format and "YAML" as the output format, then click "Convert". The YAML result appears instantly.
How do I convert YAML to JSON?
Paste your YAML in the input box, select "YAML" as the input format and "JSON" as the output format, then click "Convert". The JSON output appears in the right panel.
How do I convert XML to JSON?
Select "XML" as the input format and "JSON" as the output format, paste your XML, then click "Convert". Attributes are preserved using the @_ prefix.
Is DataConv Lite free to use?
Yes. DataConv Lite is completely free with no accounts, no ads, no tracking, and no hidden costs. All features are available to everyone.
Can I use DataConv Lite offline?
Yes. Since all processing happens client-side in your browser, the tool works without an internet connection. You can also install it as a PWA for quick access.
Does DataConv Lite work on mobile?
Yes. DataConv Lite is fully responsive and works on smartphones, tablets, and desktop computers. The interface adapts to your screen size.
How do I format or beautify minified code?
Switch to the Formatter tab, select your format, paste minified code, choose an indent size, then click Format. Use Minify to do the reverse.