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File ↔ Base64 Converter

Convert File ↔ Base64 quickly, easily, and for free

Encoder: File to Base64

Result

Result based on the provided information

Decoder: Base64 to File

Related Features

Base64 ↔ Text
Base64 ↔ File
Base64 ↔ Binary

File to Base64 and Base64 to File Converter – Online, Fast, and Free

Need to convert files like images, PDFs, or documents to Base64—or turn Base64 back into a file—quickly and securely?

Fastools offers a free online file-to-Base64 and Base64-to-file converter, compatible with the most common formats, including PDF, PNG, JPG, JPEG, GIF, SVG, WEBP, TXT, DOCX, and many more. Everything runs directly in your browser—no installation, no sign-up, and instant conversion.

Simply upload a file to get its Base64 code, or paste a Base64 string to download the original file. The process is completely secure and works on any device—computer, phone, or tablet.

Our Base64 conversion tool is perfect for developers, designers, students, IT professionals, and anyone working with APIs, system integrations, file validation, data storage, or image optimization in web projects.

How to Use the File ⇄ Base64 Converter?

  • 1️⃣ Choose: convert file to Base64 or Base64 to file.
  • 2️⃣ Upload a file (PDF, image, document, etc.) or paste a Base64 string.
  • 3️⃣ Click “Convert” and get your result instantly.

Why use Fastools’ Base64 converter?

  • ✅ Completely free and online
  • ✅ Fast conversion to and from Base64
  • ✅ Supports PDFs, images (PNG, JPG, GIF), documents, and more
  • ✅ No usage limits, no sign-up, no installation
  • ✅ Perfect for developers, designers, students, and IT professionals
  • ✅ Works on any browser and device

Benefits of Using Our Base64 Converter

  • 📄 Convert PDFs, images, and documents to Base64 accurately
  • ⚡ Decode Base64 to download the original file in seconds
  • 🔒 Secure process—runs entirely in your browser
  • 💻 Access from any device: computer, smartphone, or tablet

Who Is the Base64 Converter For?

Perfect for developers who need to send files via API, designers looking to optimize images, professionals working with digital documentation, programming students, and anyone who needs to convert files to Base64 or decode Base64 quickly and easily.

Start converting files to Base64 or Base64 to files right now with Fastools— fast, free, and compatible with all major formats!

About File and Base64 Conversion

File to Base64 and Base64 to File Conversion

File and Base64 conversion is widely used in web applications, software development, APIs, security, image handling, and data storage. This technique allows you to transform any file into an encoded text string, simplifying data transmission and system integrations.

What Is File-to-Base64 Conversion Used For?

Converting a file to Base64 is essential when you need to send, store, or transmit files as plain text. This is common in REST APIs, JSON, databases, security-sensitive systems, or when embedding images directly into HTML, CSS, or documents.

How Does Base64 Conversion Work?

Base64 conversion works by transforming binary data into a safe text representation. This ensures files can be transmitted without data loss, regardless of the medium, as text is compatible with virtually all systems and protocols.

When decoding Base64, the process is simply reversed: the encoded text returns to its original binary format, perfectly recreating the original file.

Supported File Types

File Type Extensions Common Use
Documents PDF, TXT, DOCX Reports, text files, forms, and office documents
Images PNG, JPG, JPEG, GIF, SVG, WEBP Web, design, APIs, and documents with embedded images
Audio MP3, WAV, OGG Multimedia applications and audio transmission
Other Files ZIP, CSV, JSON Backups, automations, and data transfers

How to Convert Files to Base64?

When you upload a file, the system reads its binary data and converts it into Base64 text. This string can be used to embed files in APIs, store documents in databases, or transmit files via JSON, XML, and other text-only formats.

File-to-Base64 Conversion Example

When converting a PNG image, the result will be a string like:

data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAA...

How to Convert Base64 to File?

To convert Base64 back into a file, simply decode the text. The system interprets the Base64 sequence, converts it back to binary data, and recreates the original file with the exact same extension and content.

Practical Example

Problem: You received a Base64-encoded PDF and want to download the original file.

Solution:

Paste the Base64 string into the designated area, click 'Convert', and the PDF file will be generated automatically.

Answer: The PDF file will be ready for download with the exact same content as the original.

Base64 Fun Facts

  • Base64 increases file size by approximately 33%, which is why it’s not used for compression.
  • It’s widely used in APIs because it allows sending files within JSON without data corruption.
  • Base64 images can be embedded directly in HTML using the 'src' attribute.
  • Base64 is compatible with virtually all browsers, operating systems, and programming languages.

Conclusion

Understanding file and Base64 conversion is essential for developers, designers, students, and professionals working with APIs, system integrations, image optimization, or secure data transfer. With Fastools’ converter, you can perform this entire process simply, quickly, and entirely online.