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Data Validators, Formatters & Converters

Free online validators, formatters, and converters for JSON, YAML, XML, TOML, CSV, SQL, HTML, and INI. Validate syntax, auto-format, and convert between formats instantly. Works offline.

JSON
Validate, format & convert JSON
Validate, format, minify, and convert JSON to YAML, XML, TOML, CSV, or INI. Ideal for AI API responses, with syntax highlighting and error detection
YAML
Validate, format & convert YAML
Validate, format, and convert YAML to JSON, XML, TOML, CSV, or INI. Built for Docker Compose, Kubernetes, AI/ML configs, and CI/CD pipelines
XML
Validate, format & convert XML
Validate, format, and convert XML to JSON, YAML, or CSV, with syntax checking and error detection
TOML
Validate, format & convert TOML
Validate, format, and convert TOML to JSON, YAML, XML, or INI. Built for Cargo.toml, pyproject.toml, and config files
CSV
Validate & convert CSV
Validate and convert CSV to JSON, YAML, or XML, with column consistency checking
SQL
Beautify SQL queries
Free online SQL formatter and beautifier for MySQL, PostgreSQL, SQLite, and other database queries
HTML
Validate & format HTML
Free online HTML5 validator, formatter, and beautifier with syntax checking and error detection
INI
Validate & convert INI
Validate and convert INI to JSON, YAML, or TOML. Built for configuration files

About Data Validators, Formatters & Converters

Data serialization formats are the backbone of modern software, from REST API responses (JSON) to infrastructure-as-code configs (YAML, TOML) to database queries (SQL). A single misplaced comma or unquoted key can break a deployment pipeline. These tools validate syntax errors in real time, highlight the exact line and column, auto-format your data for readability, and convert between formats with one click: turn JSON into YAML, XML into JSON, TOML into INI, and more. Everything runs locally in your browser: no data is uploaded, no signup is needed, and all tools work offline.

Frequently Asked Questions

Which data formats can I validate and convert here?
You can validate, format, and convert JSON, YAML, XML, TOML, CSV, SQL, HTML, and INI files. Each tool provides real-time syntax checking, error highlighting with line numbers, automatic formatting, and one-click conversion to other supported formats.
Is my data sent to a server for validation or conversion?
No. All validation, formatting, and conversion happens entirely in your browser using WebAssembly and JavaScript parsers. Your data never leaves your device, making these tools safe for sensitive configuration files and credentials.
Can I use these tools offline?
Yes. Fabriks is a Progressive Web App (PWA). After your first visit, all validators, formatters, and converters are cached and work without an internet connection.
What is the difference between validation, formatting, and conversion?
Validation checks whether your data conforms to the format's specification and reports errors. Formatting (also called beautification or pretty-printing) re-indents and restructures valid data so it is easier to read. Conversion transforms your data from one format to another (for example, JSON to YAML or XML to CSV. Most tools here support all three in a single interface.
How do I convert between data formats?
Each tool includes a built-in converter. For example, open the JSON tool, paste your data, and select an output format like YAML, XML, TOML, CSV, or INI. The conversion happens instantly in your browser with no data uploaded to any server.