Base64 Decoder Online Free

Decode Base64 strings back to readable UTF-8 text, preview decoded images, or download binary files directly in your browser.

100% Client-Side Processing
Input Text or String
Result Output

How to Use Base64 Decoder

1

Paste Base64 String

Paste your Base64 encoded text or Data URL.

2

Auto Detection

The tool automatically detects whether the output is text or a binary image.

3

Copy or Download

Copy decoded text or click "Download Decoded File".

Key Features & Capabilities

Text & Binary Decoding

Decodes plain text, JSON payloads, or binary file attachments.

Live Image Preview

Automatically renders image previews for data:image Base64 strings.

Strict Privacy

Runs entirely in browser memory. Zero files are sent to our servers.

About This Tool

Need to inspect a Base64-encoded token, recover an image embedded in a data URL, or decode an email attachment? Our Base64 Decoder converts Base64 back to plain UTF-8 text. If the payload is an image or file, it generates an instant visual preview and download link.

Frequently Asked Questions

Yes! If you paste an image Base64 string, the tool previews the image and provides a download button for the original PNG/JPG file.

Related Online Tools

You might also find these complementary free tools useful: