P4Software

P4Software/SheetStream

Fast, zero-dependency, MIT-licensed .xlsx library for .NET. Streams millions of rows with flat memory: tables, charts, conditional formatting, templates and a streaming reader. A free EPPlus alternative.

6 good first / help-wanted issues · C# · last activity Oct 14, 2026

0 stars 0 forks 0 watchers C# MIT License
csharp dotnet epplus-alternative excel excel-export nuget openxml spreadsheet streaming xlsx
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6 Open Issues Need Help Last updated: Oct 14, 2026

Open Issues Need Help

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Reader: expose merged cells and hyperlinks 14 days ago
enhancement good first issue
P4Software/SheetStream
0

Fast, zero-dependency, MIT-licensed .xlsx library for .NET. Streams millions of rows with flat memory: tables, charts, conditional formatting, templates and a streaming reader. A free EPPlus alternative.

C#
#csharp#dotnet#epplus-alternative#excel#excel-export#nuget#openxml#spreadsheet#streaming#xlsx
Templates: add new sheets to a filled template 14 days ago
enhancement help wanted
P4Software/SheetStream
0

Fast, zero-dependency, MIT-licensed .xlsx library for .NET. Streams millions of rows with flat memory: tables, charts, conditional formatting, templates and a streaming reader. A free EPPlus alternative.

C#
#csharp#dotnet#epplus-alternative#excel#excel-export#nuget#openxml#spreadsheet#streaming#xlsx
Sparklines 14 days ago
enhancement help wanted
P4Software/SheetStream
0

Fast, zero-dependency, MIT-licensed .xlsx library for .NET. Streams millions of rows with flat memory: tables, charts, conditional formatting, templates and a streaming reader. A free EPPlus alternative.

C#
#csharp#dotnet#epplus-alternative#excel#excel-export#nuget#openxml#spreadsheet#streaming#xlsx
Combo charts: column + line on a secondary axis 14 days ago
enhancement help wanted
P4Software/SheetStream
0

Fast, zero-dependency, MIT-licensed .xlsx library for .NET. Streams millions of rows with flat memory: tables, charts, conditional formatting, templates and a streaming reader. A free EPPlus alternative.

C#
#csharp#dotnet#epplus-alternative#excel#excel-export#nuget#openxml#spreadsheet#streaming#xlsx
Number format helpers for currencies and cultures 14 days ago
enhancement good first issue
P4Software/SheetStream
0

Fast, zero-dependency, MIT-licensed .xlsx library for .NET. Streams millions of rows with flat memory: tables, charts, conditional formatting, templates and a streaming reader. A free EPPlus alternative.

C#
#csharp#dotnet#epplus-alternative#excel#excel-export#nuget#openxml#spreadsheet#streaming#xlsx
AutoFit: weight narrow and wide characters 14 days ago
enhancement good first issue
P4Software/SheetStream
0

Fast, zero-dependency, MIT-licensed .xlsx library for .NET. Streams millions of rows with flat memory: tables, charts, conditional formatting, templates and a streaming reader. A free EPPlus alternative.

C#
#csharp#dotnet#epplus-alternative#excel#excel-export#nuget#openxml#spreadsheet#streaming#xlsx