Base64 Charset Normalizer MCP Connector for Claude

The Base64 Charset Normalizer is a specialized utility for identifying and converting URL-safe Base64 strings into standard Base64 format. This ensures consistent decoding across different software environments by handling the differences between standard and URL-safe variants. Using normalize_payload, you can automatically replace hyphens and underscores with pluses and slashes to prepare data for standard decoders. The evaluate_padding tool allows you to verify if the trailing equals signs are mathematically correct based on the payload length, preventing structural errors. Additionally, summarize_charset provides a quick audit of whether your string contains URL-safe or standard characters. This MCP is essential for developers working with web APIs, file uploads, and any system where Base64 encoding variants might cause decoding failures.