Convert any file — a PDF, a ZIP, a config, an audio clip — into a base64 string. Perfect for putting files into JSON or embedding them in scripts.
APIs that accept file uploads sometimes take base64 instead of multipart form data. JSON APIs can't hold binary — base64 is the standard workaround. Small config files and certs are also commonly shared as base64.
Note: base64 adds ~33% size. For large files, prefer real file upload endpoints.