Base64 Encoder/Decoder for C#
Free online base64 encoder/decoder with C# code examples
Working with base64 encoder/decoder in C#? Our free online base64 encoder/decoder helps C# developers format, validate, and process data instantly. Below you will find C# code examples using System.Convert (built-in) so you can achieve the same result programmatically in your own projects.
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Open Base64 Encoder/DecoderC# Code Example
using System;
using System.Text;
// Encode
string encoded = Convert.ToBase64String(
Encoding.UTF8.GetBytes("Hello, World!"));
// Decode
string decoded = Encoding.UTF8.GetString(
Convert.FromBase64String(encoded));Quick Setup
Library: System.Convert (built-in)
// Built-in — no package neededC# Tips & Best Practices
- Always specify Encoding.UTF8 for correct text handling
- Convert.ToBase64String handles byte arrays directly
- Use Base64FormattingOptions.InsertLineBreaks for MIME format