About FormatForge

A free, privacy-first suite of data format conversion and developer tools — built for speed, security, and simplicity.

Our Mission

FormatForge exists to solve a simple but persistent problem: developers, data analysts, and system administrators constantly need to convert data between formats. Whether you are transforming a JSON API response into a CSV spreadsheet, converting Kubernetes YAML manifests to JSON for debugging, or migrating INI configuration files to TOML, the process should be instant, free, and private.

We built FormatForge to be the tool we wished we had — one that handles every common data format conversion without requiring account creation, software installation, or trusting a server with your data. Every conversion runs entirely in your browser using client-side JavaScript, which means your data never leaves your device.

Privacy by Design

FormatForge processes all data entirely in your browser. Nothing is ever uploaded, transmitted, or stored on any server. This is not just a policy choice — it is an architectural decision baked into the application.

No server processing.All parsing, conversion, formatting, and validation happen in your browser using JavaScript libraries. There is no backend API that touches your data.
No data storage.Your input and output data exist only in your browser's memory while you use the tool. Nothing is written to any database, log file, or analytics system.
Works offline.After the page loads, you can disconnect from the internet and the converter will continue to work. This is the strongest proof that your data stays local.
No account required.There is no sign-up, no login, and no user tracking. You open the page and start converting immediately.

This approach makes FormatForge safe for converting sensitive configuration files, API credentials, database exports, and any other data you would not want leaving your machine. Read our full Privacy Policy for more details.

Supported Formats

FormatForge supports conversion between 8 data formats, covering 46 unique conversion pairs. Each format can be converted to any other supported format, with the conversion engine using JSON as an intelligent intermediate representation for cross-format transformations.

JSON

JavaScript Object Notation — the web standard for APIs and data exchange

CSV

Comma-Separated Values — universal tabular data format for spreadsheets

XML

eXtensible Markup Language — enterprise standard for structured documents

YAML

YAML Ain't Markup Language — human-friendly configuration format

TOML

Tom's Obvious Minimal Language — modern configuration file format

INI

Initialization file format — simple key-value configuration

SQL

Structured Query Language — INSERT statements for database imports

.env

Environment variable files — key-value configuration for applications

Beyond Conversion

FormatForge is more than a converter. We provide a comprehensive suite of developer tools, all running client-side with the same privacy guarantees:

Validators

Syntax validation for JSON, XML, YAML, CSV, TOML, INI, and SQL with detailed error messages and line-level error positions.

Formatters

Beautify or minify JSON, XML, YAML, HTML, CSS, JavaScript, and more with configurable indentation and output options.

Batch Conversion

Convert multiple files at once with drag-and-drop upload and download results as a ZIP archive.

JSON Tools

JSONPath querying, JSON diff comparison, JSON Schema validation, and JSON to TypeScript type generation.

Developer Utilities

Escape/unescape strings, Base64 encoding, URL encoding, UUID generation, hash generation, JWT decoding, regex testing, and more.

Learning Resources

In-depth guides explaining each data format — syntax, data types, best practices, and common use cases.

Explore all available tools on our Tools page.

How Conversion Works

FormatForge uses a hub-and-spoke conversion architecture with JSON as the central intermediate format. Direct conversions exist for all JSON-to-X and X-to-JSON pairs, while cross-format conversions (such as CSV to YAML or XML to TOML) are processed in two steps:

Source Format (e.g., CSV)

↓ Parse to JSON

JSON (Intermediate)

↓ Serialize from JSON

Target Format (e.g., YAML)

This architecture ensures consistent, reliable conversions across all format pairs while keeping the codebase maintainable. Each format only needs a parser (to JSON) and a serializer (from JSON), rather than requiring dedicated code for every possible format pair.

Get in Touch

Have a feature request, found a bug, or want to suggest a new format? We would love to hear from you. FormatForge is actively maintained and we regularly add new tools and formats based on user feedback.