File Converter Tools
Free online converters for images and structured data — 100% browser-based & private
Image Converter
Convert images between PNG, JPEG, and WebP formats with quality compression.
Open Tool →CSV & JSON Converter
Convert CSV data to formatted JSON files, or JSON arrays back to CSV sheets.
Open Tool →File Converter Tools — Frequently Asked Questions
Are my uploaded files sent to any server for conversion?
No. ConverterBox is dedicated to privacy. All file conversions (image conversions, CSV/JSON transforms) are processed entirely client-side in your web browser. Your files never leave your computer.
Does ConverterBox support large file conversions?
Since the conversion happens locally using your browser's memory and CPU, it is highly optimized for standard files. For extremely large datasets or huge image batches, browser memory limitations may apply.
Is there a limit on how many files I can convert?
No. There are no daily limits, paywalls, or registrations. You can perform as many file conversions as you need, completely free of charge.