Free Online Base64 Encode/Decode
Encode and decode Base64 strings online for free. Convert text to Base64 and back, or encode files. Browser-based tool — your data stays private.
Encode a File to Base64
Drop a file to encode
The file will be converted to a Base64 string
Max file size: 10 MB
How to Use
STEP 1
Upload File
Drag and drop or click to select your file
STEP 2
Process
Adjust settings and click process
STEP 3
Download
Download your processed file instantly
Why BrowserTool?
No Upload Required
Your files are processed 100% in your browser. Nothing is ever uploaded to any server.
100% Free
All tools are completely free to use with no registration, limits, or watermarks.
Lightning Fast
Processing happens locally on your device, so there's no waiting for server responses.
Frequently Asked Questions
What is Base64 encoding?
Base64 is a binary-to-text encoding scheme that represents binary data in an ASCII string format. It's commonly used for embedding images in HTML/CSS, email attachments, and API data transfer.
Can I encode files to Base64?
Yes! You can drag and drop any file to convert it to a Base64 string. This is useful for embedding images or other binary data in code.
Is Base64 encoding the same as encryption?
No. Base64 is an encoding scheme, not encryption. Anyone can decode a Base64 string. Do not use it for securing sensitive data.
Why does Base64 increase size?
Base64 encoding increases data size by approximately 33% because it represents 3 bytes of binary data as 4 ASCII characters.
Is my data transmitted anywhere?
No. All encoding and decoding happens entirely in your browser. Your data never leaves your device.