Skip to content
EWU IT Solutions GmbH
Contact

Base64 to File Converter | Free Online Tool

Convert Base64 encoded data back to original files (PDF, images, documents). 100% free, client-side processing with no ads, no tracking, and no cookies.

✓ 100% Ad-Free ✓ Privacy-First ✓ No Signup ✓ Zero Cookies

Drop a file or click to upload

No size limit. Processed locally.

Examples

Base64 image data decoded back to PNG file

Input:

iVBORw0KGgoAAAANSUhEUg...

Output:

image.png (downloadable)

Base64 PDF data decoded back to original file

Input:

JVBERi0xLjQKJ...

Output:

document.pdf (downloadable)

When to Use This

  • Downloading files received via Base64 APIs
  • Recovering embedded files from data URIs
  • Converting API responses back to downloadable files
  • Extracting attachments from encoded data

Related Tools

Base64 Encoder

Encode text and files to Base64

Base64 Decoder

Decode Base64 to original content

Text to Base64

Convert plain text to Base64

Base64 to Text

Decode Base64 to readable text

How It Works

Base64 is a binary-to-text encoding scheme that converts binary data into ASCII characters. The Base64 alphabet uses 64 characters: A-Z, a-z, 0-9, +, and / (with = for padding). This encoding is essential for transmitting binary data over text-based protocols like HTTP, JSON, and XML.

When you decode Base64, the Base64 characters are converted back to their original binary representation.

Frequently Asked Questions

How does file type detection work?
The tool inspects the Base64 header for data URI prefixes (e.g., data:image/png;base64,). If no prefix is present, you can manually select the file type or the tool will prompt for the type.
What if my Base64 has no file type info?
Paste your Base64 string and use the "Advanced" options to specify the file type manually. The tool will then generate the correct downloadable file.
Can I decode corrupt Base64 data?
The tool validates your input and reports errors. If data is truncated or contains invalid characters, the error message will indicate where the problem lies.
Is my decoded file private?
Yes. All decoding and file generation happens locally in your browser. No file content is sent to any server. Zero cookies, zero tracking, zero ads.
Why use Base64 for file transfer?
Base64 allows binary files to be transmitted over text-only protocols like JSON APIs, email, or XML. It is a standard encoding used for file uploads in many web services.

Your Privacy is Protected

All Base64 encoding and decoding happens entirely in your browser. Your text and files never leave your device, are never sent to any server, and are never stored. We use zero cookies, zero tracking, and zero ads.