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How to Decode Base64 to String - Step by Step Guide

Step 1

Enter Base64 Data

Start by pasting your Base64 encoded string into the input area. Base64 is commonly used in APIs, databases, and data transmission to encode binary data as text.

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Paste Base64: Copy and paste your Base64 encoded text
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Data URI support: Automatically handles data URI prefixes
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Try sample: Click "Sample" to test with example data
Step 2

Automatic Conversion

The tool automatically decodes your Base64 data to plain text string as you type using the browser's native atob() function. The decoded text appears instantly with character count and UTF-8 support.

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Real-time decoding: Instant conversion as you type
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Character count: See decoded text length with UTF-8 encoding support
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Error validation: Clear error messages for invalid input
Step 3

Copy or Download

Once decoded, you can copy the text to your clipboard or download it as a .txt file for later use or analysis.

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Copy to clipboard: One-click copying for quick use
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Download as file: Save using Blob API as .txt file
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Secure processing: All decoding happens client-side in your browser

Frequently Asked Questions

How do I decode Base64 to string?

Simply paste your Base64 encoded data into the input field. The tool automatically decodes it to plain text as you type. You can then copy the decoded string or download it as a text file.

Is this Base64 decoder secure?

Yes, completely secure. All Base64 decoding happens entirely in your browser using client-side JavaScript (atob). Your data never leaves your device or gets sent to any server. This follows security best practices for data handling.

What if I get an "Invalid Base64 format" error?

This error occurs when the input contains invalid characters or incorrect padding. Base64 strings should only contain A-Z, a-z, 0-9, +, /, and = (for padding). Try removing any extra whitespace or special characters not part of the Base64 alphabet.

Can I decode binary files like images to string?

While this tool can decode any Base64 data, binary files like images will produce unreadable characters since they contain non-text binary data. For images, use the Base64 to Image tool instead.

Is this Base64 to String converter free?

Yes, completely free with no size limits, no registration required, and unlimited conversions with full privacy protection.

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