Encode and decode URL query strings and path segments safely.
Percent-encode reserved characters for query parameters, or decode encoded URLs back into readable text.
This tool uses encodeURIComponent, which encodes characters like &, ?, and = — safer for query parameter values.
Malformed percent sequences (e.g. %ZZ) cannot be decoded and will show an error.
Encode and decode Base64 strings with proper UTF-8 support.
Developer Tools
Beautify or minify JSON with clear validation errors.
Developer Tools
Convert Unix timestamps to dates and back using your local timezone.
Developer Tools
Convert CSV to JSON and JSON to CSV privately in your browser.
Developer Tools
Calculate percentages, reverse percentages, and percent change.
Calculators
Compute sale price, savings, and optional tax from a discount %.
Business Tools
