8 tools in this category. Everything runs in your browser.
Encode and decode Base64 text entirely in your browser.
Encode and decode URL query components client-side.
Convert text to HTML entities and back in your browser.
Convert JSON object arrays into CSV files locally.
Convert CSV tables into JSON arrays in your browser.
Convert between JSON and YAML without uploading files.
Convert colors between hex and RGB formats.
Convert Unix timestamps and ISO dates locally.