Instantly format and translate formats locally. All processing happens locally — your data remains locally in your browser.
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Files processed exclusively in local volatile memory buffers (zero outbound transfers)
Unlike cloud engines that serialize, cache, and index spreadsheets on remote networks, Filemint binds processing parameters natively to the client window, eliminating third-party payload exposure hooks.
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Upload a CSV, JSON, or XML file to view local runtime trace parameters.
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.
Check JSON syntax and find errors by line and column. Validate API responses and configuration files without uploading them.
Explore JSON in a readable tree view. Expand nested objects, inspect arrays, and search large payloads locally in your browser.
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 remains locally 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 remains locally on your device. This makes FileMint ideal for converting proprietary datasets, API credentials, configuration files, and other sensitive information.
There is no server upload-size limit because processing happens locally. Practical limits still depend on your browser's available memory and CPU, especially for very large JSON or CSV files.
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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