FileSizeFromBase64.NET

A .NET Standard 2.1 project containing a single method to get file size from base64 string. The base64 string can contain MIME-type or not. Paddings are also supported in the decoding process, you can define whether the paddings rules should be applied or not.

Installation

You can install the NuGet Package in any .NET Project: .NET, .NET Standard, .NET Core, .NET, Xamarin, Maui, ... etc.

FileSizeFromBase64.NET can be found here on NuGet and can be installed by copying and pasting the following command into your Package Manager Console within Visual Studio (Tools > NuGet Package Manager > Package Manager Console).

Install-Package FileSizeFromBase64.NET

Alternatively, if you're using .NET Core then you can install FileSizeFromBase64.NET via the CLI with the following command:

dotnet add package FileSizeFromBase64.NET

🚀 Install the latest version for better performance

.NET SDK 10.0.100
  [Host] : .NET 10.0.0 (10.0.0, 10.0.25.52411), Arm64 RyuJIT armv8.0-a
  v3.0.0 : .NET 10.0.0 (10.0.0, 10.0.25.52411), Arm64 RyuJIT armv8.0-a
  v2.0.1 : .NET 10.0.0 (10.0.0, 10.0.25.52411), Arm64 RyuJIT armv8.0-a
  v2.0.0 : .NET 10.0.0 (10.0.0, 10.0.25.52411), Arm64 RyuJIT armv8.0-a
  v1.0.0 : .NET 10.0.0 (10.0.0, 10.0.25.52411), Arm64 RyuJIT armv8.0-a

IterationCount=15  LaunchCount=2  WarmupCount=10

Method	Job	Mean	Error	StdDev	Median	Ratio	RatioSD	Gen0	Gen1	Gen2	Allocated	Alloc Ratio
GetFileSizeFromRawBase64String	v3.0.0	0.8489 ns	0.0122 ns	0.0182 ns	0.8504 ns	-100.0%	2.3%	-	-	-	-	NA
GetFileSizeFromRawBase64String	v2.0.1	268,150.1527 ns	2,836.3664 ns	4,245.3400 ns	268,407.4910 ns	-45.0%	1.8%	-	-	-	-	NA
GetFileSizeFromRawBase64String	v2.0.0	287,886.9504 ns	4,755.8080 ns	6,971.0023 ns	286,065.4297 ns	-41.0%	2.6%	-	-	-	-	NA
GetFileSizeFromRawBase64String	v1.0.0	487,946.5708 ns	3,288.8085 ns	4,610.4506 ns	487,734.9849 ns	baseline		-	-	-	-	NA
GetFileSizeFromMimePrefixedBase64String	v2.0.0	2.6145 ns	0.0167 ns	0.0249 ns	2.5986 ns	-100.0%	2.7%	-	-	-	-	-100%
GetFileSizeFromMimePrefixedBase64String	v2.0.1	2.8855 ns	0.0166 ns	0.0248 ns	2.8952 ns	-100.0%	2.6%	-	-	-	-	-100%
GetFileSizeFromMimePrefixedBase64String	v3.0.0	3.5208 ns	0.0216 ns	0.0323 ns	3.4970 ns	-100.0%	2.7%	-	-	-	-	-100%
GetFileSizeFromMimePrefixedBase64String	v1.0.0	1,570,848.1272 ns	28,294.8563 ns	40,579.6408 ns	1,558,949.4229 ns	baseline		152.3438	152.3438	152.3438	10932757 B

Documentation

using FileSizeFromBase64.NET;

var fileSize = FileSizeHelpers.GetFileSizeFromBase64String(
  string base64String,
  bool applyPaddingsRules,
  UnitsOfMeasurement unitsOfMeasurement)

Parameters	Data type	Description	Required	Default Value
base64String	string	The base64 representation of the file.	Yes
applyPaddingsRules	boolean	Base64 - Padding	No	false
unitsOfMeasurement	Enum	The unit of measurement for the file size returned by the method: UnitsOfMeasurement.Byte, UnitsOfMeasurement.KiloByte, UnitsOfMeasurement.MegaByte	No	UnitsOfMeasurement.Byte

Usage

using FileSizeFromBase64.NET;

// File hello-world.txt => Size = 13 Bytes, Content: Hello world !
var base64String = "data:text/plain;base64,SGVsbG8gd29ybGQgIQ==";

var fileSize = FileSizeHelpers.GetFileSizeFromBase64String(base64String, true);
Console.WriteLine($"File size: {fileSize}");
    
var fileSizeInKB = FileSizeHelpers.GetFileSizeFromBase64String(base64String, true, UnitsOfMeasurement.KiloByte);

var fileSizeInMB = FileSizeHelpers.GetFileSizeFromBase64String(base64String, true, UnitsOfMeasurement.MegaByte);

Created by: Laurent Egbakou

• LinkedIn: Laurent Egbakou
• Twitter: @lioncoding

License

The MIT License (MIT) see the License file

Contribution

Feel free to create issues and PRs 😃