Can I convert large blocks of text or files?

The tool processes text strings input directly; it does not support uploading files or pasting extremely large paragraphs, and very long inputs may cause display truncation.

What is the difference between standard and URL-safe Base64?

Standard Base64 uses + and / characters, while URL-safe Base64 replaces them with - and _ to avoid issues in URLs and filenames; the tool offers both options for compatibility.

Is the converted data secure or encrypted?

Base64 encoding is not encryption or security; it is simply a representation format. The output can be decoded back to the original text by anyone with the tool.

Does the tool preserve special characters or formatting?

The converter processes the raw character sequence; special characters are encoded as part of the string, but original formatting like line breaks may not be retained in the output.

General ConversionFree Tool

Base64 String Converter

Provided byIT Toolsit-tools.tech

Encodes and decodes text to and from Base64 with both standard and URL-safe alphabets.

Use This Tool

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Screenshot of Base64 String Converter on IT Tools — it-tools.techOpen the live tool →

About this tool

What Base64 String Converter does

Base64 String Converter is a straightforward utility for transforming text between readable format and Base64 encoding. Users input a string and select the desired operation to instantly receive the encoded or decoded output. The tool handles both standard and URL-safe alphabet variations, making it suitable for a range of data transmission needs. It serves as a quick reference or conversion aid for anyone working with encoded data streams or API payloads.

Step by step

How to use the IT Tools Base64 String Converter

1
Open the Base64 String Converter on IT Tools
2
Enter or paste the text string you wish to convert
3
Select 'Encode' to generate the Base64 output or 'Decode' to reverse the process
4
View the resulting encoded or decoded string in the output field

Is it right for you

Best for

Developers and technical users who need to quickly encode or decode data for API integration, email attachments, or web development tasks without installing software.

Limitations

No file upload support, text input only
Output length may vary significantly from input length
Results are estimates based on standard Base64 algorithms

Questions

Base64 String Converter FAQ

Can I convert large blocks of text or files?: The tool processes text strings input directly; it does not support uploading files or pasting extremely large paragraphs, and very long inputs may cause display truncation.
What is the difference between standard and URL-safe Base64?: Standard Base64 uses + and / characters, while URL-safe Base64 replaces them with - and _ to avoid issues in URLs and filenames; the tool offers both options for compatibility.
Is the converted data secure or encrypted?: Base64 encoding is not encryption or security; it is simply a representation format. The output can be decoded back to the original text by anyone with the tool.
Does the tool preserve special characters or formatting?: The converter processes the raw character sequence; special characters are encoded as part of the string, but original formatting like line breaks may not be retained in the output.

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