Character Encoding Troubleshooting Handbook: Mojibake, URL Encoding, and Base64 Explained

Chinese turning into ??? or é”±? %E4%B8%AD unreadable? This handbook classifies by symptom — real mojibake, URL percent-encoding, Unicode escaping, and Base64 with Chinese, plus an encoding primer and a debugging workflow.

Base64 Decode Shows Garbled Text or Black Question Marks for Chinese — How to Fix

Base64 decode turns Chinese into mojibake or black question marks? Explains the root cause — Base64 encodes bytes, not characters — and gives command-line, code, and online-tool fixes, all processed locally.

How to Batch Encode Multiple Files or Texts to Base64 (No Script Needed)

Need to convert dozens of images or strings to Base64 at once? Learn batch Base64 encoding and step-by-step how to do it locally without uploading files or writing scripts.