BitToolsKit / guides

Encoding

Practical guides on JSON, encoding, regular expressions, timestamps and text tools. Short, example-driven articles that explain how things work and how to avoid common mistakes.

Base64 invalid length error explained with C# and Python examples, missing padding, URL-safe characters, and common decoding fixes.

Encoding

Invalid Length for a Base-64 Char Array or String: Causes and Fixes

What the Base-64 invalid length error means, the rule behind it and how to fix it in C#, Python and JavaScript.

Oct 19, 2026 Hanan Chaudhry

Read Article