Base64 Guru Encoder

The Base64 Guru Encoder converts between plain text and Base64-encoded text. It accepts an input string and an operation mode (encode or decode) and returns the transformed string. Conceptually, encoding maps 3-byte blocks to 4 ASCII characters; decoding reverses this process. The tool supports a UTF-8 input path, so Unicode text is treated as UTF-8 bytes before encoding. It also offers a URL-safe variant to produce base64url output suitable for URLs and JSON payloads. Batch mode can process multiple lines in a single run, producing a corresponding line for each input line. Unique value lies in its combination of standard and URL-safe encoding, padding control, and batch capability, which streamlines data preparation for APIs, test data, and logs. Use cases include embedding binary data in JSON, preparing token payloads, and quick verification of encoded strings during debugging. Core features are: input_text and operation inputs; optional charset (default UTF-8); optional url_safe toggle; optional omit_padding; batch_input support; deterministic outputs with clear length information. Outputs are plain text strings, with character counts available for validation. The tool is independent of any UI context and focuses on the transformation logic and its correct application in scripts and automated workflows.