Encoding and decoding are fundamental operations in web development, API integration, and security debugging. Base64 converts binary data to ASCII-safe strings for email, data URIs, and token payloads. URL encoding (percent-encoding) makes special characters safe in query strings and redirect URLs. JWT decoding reveals authentication token claims for debugging without backend access.
QuickFormat's encoding toolkit includes Base64 Encode, Base64 Decode, URL Encode, URL Decode, and JWT Decoder — five tools that cover the most common encoding tasks developers encounter daily. Each tool processes input locally in your browser, which is critical when working with API keys, session tokens, or encoded credentials.
Base64 encoding is reversible and deterministic — encode text or small files, then decode back with our Base64 Decode tool. URL encoding uses standard encodeURIComponent semantics for query parameter values. The JWT Decoder splits tokens into header, payload, and signature sections with formatted JSON output and expiration status.
Important security note: JWT decoding reveals token contents but does not verify signatures. Always use cryptographic libraries server-side for production token verification. These tools are designed for development debugging, not security validation.