String Builder
Turn multi-line text into StringBuilder code with proper escaping.
String Builder Code Generator
Paste multi-line text – HTML, SQL, JSON, email templates, anything – and get ready-to-paste code that builds that string in C#, Java, VB.NET, JavaScript, Python, or PHP. Special characters are escaped for you.
Why use it?
Embedding long text in source code by hand is tedious and error-prone: you have to escape every quote and backslash, add newline characters, and wrap each line in an append call. This generator does it instantly and correctly.
Supported output
- C# –
var sb = new StringBuilder(); sb.AppendLine("..."); - Java –
StringBuilder sb = new StringBuilder(); sb.append("...\n"); - VB.NET –
Dim sb As New System.Text.StringBuilder() - JavaScript – array of lines joined with
\n - Python – list of lines joined with
"\n".join() - PHP – string concatenation with
.=
Options
Choose the variable name and whether each line should end with a line break. Use the Text Replacer afterwards if you need to inject variables into the generated code.
Frequently Asked Questions
What does the String Builder tool do?
It converts multi-line text into source code that builds the same string, using StringBuilder in C#, Java, and VB.NET, or the idiomatic equivalent in JavaScript, Python, and PHP. Quotes and backslashes are escaped automatically.
Why use StringBuilder instead of string concatenation?
In C#, Java, and VB.NET, strings are immutable, so repeated concatenation creates a new string each time. StringBuilder appends to one buffer, which is much faster when building large strings in loops.
What does 'Add line breaks' change?
When enabled, each line is appended with a newline (AppendLine in C#/VB.NET, \n in other languages), so the generated string keeps your original line structure.