Base64 to File & File to Base64 Converter
Convert files to Base64 strings and Base64 strings back to downloadable files instantly. 100% free, secure, and works entirely in your browser - no file uploads required.
100% Private
Files never leave your device
Instant Conversion
Fast browser processing
Multiple Formats
Images, PDFs, documents
File to Base64
Upload your file and convert it to a Base64 string for embedding or storage.
Supports images, PDFs, documents, and most file types
Base64 to File
Paste a Base64 string to convert it back to its original downloadable file.
Include the data URL prefix (e.g., data:image/png;base64,...)
Include correct file extension for proper file type detection
Usage Tips
- For File to Base64: Select any file to get its Base64 representation with proper data URL format
- For Base64 to File: Ensure your Base64 string includes the data URL prefix (e.g., data:image/png;base64,...)
- Always include the correct file extension when downloading converted files
Why Use Our Base64 Converter?
Complete Privacy & Security
All conversions happen locally in your browser. Your files never leave your device, ensuring maximum privacy and security for sensitive data.
Lightning Fast Processing
Convert files instantly without waiting for uploads or server processing. Our browser-based approach ensures the fastest possible conversion times.
Multiple Format Support
Works with images (PNG, JPG, WebP), PDF documents, text files, and most other binary file formats. Perfect for web development and data handling.
Mobile Friendly
Fully responsive design that works perfectly on smartphones, tablets, and desktop computers. No app installation required.
Frequently Asked Questions
What is Base64 encoding used for?
Base64 encoding is commonly used to embed binary data in text-based formats like HTML, CSS, JSON, or XML. It's essential for data URIs, email attachments, and storing binary data in databases that only accept text.
Why doesn't my Base64 string work for conversion?
Make sure your Base64 string includes the complete data URL format: "data:[mime-type];base64,[base64-data]". The tool needs the mime type information to properly reconstruct the file.
Is there a file size limit?
While there's no strict limit, very large files (over 50MB) may cause browser performance issues. For optimal performance, we recommend converting files under 10MB.
Can I use this for sensitive documents?
Yes! Since all processing happens locally in your browser, your sensitive documents never leave your computer. This makes it safe for confidential files and personal data.
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Give Us Your Feedback
Your feedback on this tool is very important to us. Email us your thoughts, suggestions, or any bugs you may have found.