Format, Validate & Convert
JSON, YAML, TOML & XML
8 enterprise-grade data format tools for developers, DevOps engineers, and API engineers. All processing is 100% client-side — your data never leaves your browser.
All Tools
JSON Formatter
Format, validate, minify, and sort JSON. Detects syntax errors with line numbers, sensitive keys, and deep nesting warnings.
JSON Beautifier
Instantly beautify minified or escaped JSON from API responses and log files. Auto-detects and unescapes double-encoded JSON.
YAML Formatter
Format and validate YAML files including Kubernetes, Docker Compose, and GitHub Actions manifests. Detects tab indentation.
YAML Validator
Validate YAML with mode-specific checks for Kubernetes, Docker Compose, GitHub Actions, GitLab CI, and OpenAPI schemas.
YAML → JSON
Convert YAML to JSON with multi-document support, anchor/alias resolution, and full data type preservation.
JSON → YAML
Convert JSON to clean, readable YAML with platform presets for Kubernetes, Docker Compose, and GitHub Actions.
TOML Converter
Convert between TOML, JSON, and YAML. Supports Cargo.toml, pyproject.toml, Netlify, and Hugo configuration files.
XML → JSON
Convert XML to JSON with attribute handling, namespace support, and built-in XXE security protection.
JSON vs YAML vs TOML vs XML
| Format | Human Readable | Comments | Data Types | Primary Use Case |
|---|---|---|---|---|
| JSON | Moderate | No | Full | APIs, configuration, data exchange |
| YAML | High | Yes | Full | Kubernetes, Docker, CI/CD, config files |
| TOML | High | Yes | Full + Dates | Application config (Cargo.toml, pyproject.toml) |
| XML | Low | Yes | Strings (attributes/text) | SOAP, legacy APIs, Java configs, sitemaps |
Frequently Asked Questions
Is my data processed on a server?
No. All formatting, validation, and conversion happens entirely in your browser. Your JSON, YAML, TOML, and XML data never leaves your device and is never sent to any external server.
What is the maximum file size supported?
There is no hard limit enforced server-side (since all processing is client-side), but files larger than 5MB will trigger a performance warning. Very large files (50MB+) may slow down your browser.
When should I use YAML over JSON?
YAML is better for human-edited configuration files because it supports comments and is more readable. JSON is better for machine-to-machine data exchange because it is simpler to parse and has no ambiguities around types.
What makes TOML different from YAML?
TOML is explicitly designed for configuration files. It has a simpler, less ambiguous syntax than YAML, unambiguous type coercion rules, and native date/time support. It is popular in the Rust and Python ecosystems.