Free Online Data Format Converters for Developers
Convert between JSON, YAML, XML, CSV, Base64, and more with our collection of free, client-side tools. All conversions happen in your browser - your data never leaves your device. Fast, secure, and developer-friendly.
JSON Converters
YAML to JSON Converter
Convert YAML to JSON instantly with our free online tool.
JSON to YAML Converter
Convert JSON to YAML instantly with our free online tool.
XML to JSON Converter
Convert XML to JSON instantly with our free online tool.
JSON to XML Converter
Convert JSON to XML instantly with our free online tool.
JSON to CSV Converter
Convert JSON to CSV instantly with our free online tool.
CSV to JSON Converter
Convert CSV to JSON instantly with our free online tool.
TOML to JSON Converter
Convert TOML to JSON instantly with our free online tool.
JSON to TOML Converter
Convert JSON to TOML instantly with our free online tool.
JSON to Excel Converter
Convert JSON to Excel (.xlsx) instantly with our free online tool.
Excel to JSON Converter
Convert Excel (.xlsx) to JSON instantly with our free online tool.
Encoding Tools
Hex to ASCII Converter
Convert hexadecimal to ASCII text instantly with our free online tool.
ASCII to Hex Converter
Convert ASCII text to hexadecimal instantly with our free online tool.
Base64 Encoder
Encode text or data to Base64 format instantly with our free online tool.
Base64 Decoder
Decode Base64 to text or binary data instantly with our free online tool.
URL Encoder
Encode text for safe use in URLs with our free online tool.
URL Decoder
Decode URL-encoded text back to readable format with our free online tool.
Other Utilities
Why Use ConvertJSON.io?
100% Private
All conversions happen in your browser. Your data never leaves your device.
Lightning Fast
No server round-trips. Instant conversions powered by modern JavaScript.
Always Free
No sign-up, no limits, no ads. Just the tools you need.