Convert YAML, JSON, and generate TypeScript types in your browser
Developers work across multiple config formats daily: YAML for Kubernetes and Ansible, JSON for APIs and settings, .env files for secrets, and TypeScript interfaces for type safety. Manually converting between these formats wastes time, introduces typos, and breaks builds. The solution is converting formats instantly in your browser, without uploading anything to a server or creating an account.
Why config format conversion matters
Every project touches multiple formats. A Helm chart uses YAML, but your application reads JSON. Your CI/CD pipeline expects .env variables. Your TypeScript application needs type definitions matching your API responses. Handling these conversions by hand—copying, pasting, editing—is error-prone and slows down development. A single typo in a configuration key breaks deployments or causes runtime errors. Automated conversion tools eliminate mistakes and keep your workflow moving, especially when integrating tools that speak different configuration languages.
Converting YAML to JSON
YAML's human-friendly syntax makes it ideal for configuration files, but many tools and APIs expect JSON. Convert your YAML to JSON in seconds. Paste Kubernetes manifests, Docker Compose files, Ansible playbooks, or any YAML structure and instantly get valid JSON output. This is especially useful when working with APIs that only accept JSON, or when you need to embed config data inside a JSON file. If you're building a tool that reads Kubernetes specs but your application only understands JSON, this conversion bridges the gap instantly. Complex multi-document YAML with anchors and aliases becomes flat, valid JSON ready for your application to consume.
Generating TypeScript types from JSON samples
When working with APIs or configuration objects, you need TypeScript interfaces that match your actual data. Instead of writing types by hand, generate TypeScript interfaces directly from a JSON sample. Paste a JSON object—a REST API response, a config file, a database record—or an entire API response and get fully typed interfaces. Optional fields, nested objects, and arrays are all handled correctly, saving hours of typing and preventing type mismatches between your code and data. This is invaluable when your API documentation is outdated but you have a live response you can copy. The generated types keep your application in sync with reality.
Managing environment variables and secrets
Environment variables are critical for storing secrets, database URLs, and deployment-specific settings. Converting between JSON configuration and .env files is common in deployment pipelines. Convert JSON objects to .env format to manage secrets safely in your CI/CD platform. Each key becomes an environment variable, with values properly escaped. This bridges the gap between configuration management tools and containerized applications that read from .env files. When deploying a service to Docker or Kubernetes, you often need to transform configuration from JSON stored in your application into .env format that your container runtime understands.
Flattening nested JSON for data analysis
Complex nested JSON structures are powerful for APIs but difficult to work with in spreadsheets or analytics tools. Flatten nested JSON into key-value pairs where each path becomes a column. A deeply nested API response becomes a row ready for analysis in Excel or Google Sheets. This is essential when you need to export application data for reporting or run quick analyses without writing scripts. For instance, if your logging system returns events with nested user objects, geolocation data, and request metadata, flattening turns that tree into a flat structure where every field becomes its own column.
Common conversion patterns in development workflows
Most developers follow predictable patterns across their tooling. You might start with a Kubernetes deployment in YAML, convert it to JSON for validation, then extract a subset into your TypeScript definitions. Or you pull a JSON API response, flatten it for analysis, then convert selected fields to .env variables for your staging environment. TextArray's tools handle each step without leaving your browser. Chain these conversions—YAML to JSON to TypeScript to .env—and keep everything in your workflow transparent and auditable.
Validating your converted data
A successful conversion is more than syntactically correct output—it must preserve meaning. When converting from YAML to JSON, verify that nested structures map correctly and that lists maintain their order. When generating TypeScript from JSON, check that optional fields are marked correctly and that nested objects generate nested types. These tools produce output you can inspect immediately in your browser before committing or deploying. If something looks wrong, you can adjust your source and convert again without any setup or installation required.
Running entirely in your browser
These tools run completely in your browser—nothing is uploaded to a server. Your YAML files, JSON data, environment variables, and TypeScript configurations stay on your computer. No accounts are required, no tracking happens, and the tools work offline after the page loads. Close the tab and your data is gone from every server. This privacy-first approach keeps sensitive configuration data safe and gives you full control over your workflow. Whether you're handling production secrets, internal API structures, or proprietary configuration schemas, everything remains local and secure.