Instantly transform between CSV, JSON, XML, and YAML. All processing happens locally — your data never leaves your browser.
Pick a tool and start transforming your data instantly
Convert CSV/Excel files to JSON format. Auto-detects delimiters, handles headers, supports nested objects. Perfect for API data preparation.
Transform JSON data into Excel-compatible CSV files. Flatten nested objects automatically. Great for data analysis and reporting.
Convert JSON to XML format. Customize root element and attributes. Useful for legacy system integration and SOAP APIs.
Parse XML documents to JSON format. Preserves structure and attributes. Convert SOAP responses, RSS feeds, or config files.
Convert JSON to YAML format. Human-readable output for configuration files. Perfect for Docker Compose, Kubernetes, CI/CD configs.
Parse YAML to JSON format. Validate syntax and convert config files. Useful for programmatic config manipulation.
Encode and decode Base64 strings. Convert images, files, or text to Base64. Essential for data URIs and API payloads.
Beautify and minify JSON data. Validate syntax, fix errors, and format for readability. Includes syntax highlighting.
The ultimate multidirectional data transformation tool. Convert between JSON, CSV, XML, and YAML in any direction.
Built with privacy, speed, and simplicity as our core principles
Whether you're migrating databases, integrating APIs, or preparing data for analysis, Filemint's converters handle the heavy lifting. We support complex nested structures, preserve data types, and provide detailed error messages when formats are invalid.
Data converters often handle customer databases, financial records, or proprietary business intelligence. Filemint ensures your confidential data never leaves your control—no cloud storage, no analytics tracking, no third-party access.
Everything you need to know about our data converters
Absolutely! All conversions happen entirely in your browser—your data never leaves your device. This makes FileMint ideal for converting proprietary datasets, API credentials, configuration files, and other sensitive information.
There are no file size limits. Since processing happens locally using your device's memory and CPU, you can convert files of any size. We've tested with multi-gigabyte JSON files without issues.
Our converter intelligently handles nested structures using dot notation in CSV headers. For example, 'address.city' becomes a nested 'city' field inside an 'address' object in JSON. You can also configure custom delimiters.
Yes! Our YAML to JSON converter preserves all data types, including multi-line strings, anchors, and complex nested structures. Perfect for converting Docker Compose, Kubernetes manifests, and CI/CD configurations.
Yes. Once the page loads, many converters can run offline. This supports secure environments, travel, and privacy-focused workflows.
Our tools include built-in validators that catch syntax errors before conversion. For JSON, you'll see exactly where the error is located with line numbers. This helps you fix issues before processing.
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