Base64 Encoder/Decoder
Encode and decode Base64 strings, files, and images.
How to Use the Base64 Tool
Select the mode you need: Encode to convert text to Base64, Decode to convert Base64 back to text, or Image to work with image files. You can also upload files directly or drag and drop images.
Features
- Text Encoding - Convert any text to Base64 format
- Text Decoding - Convert Base64 strings back to readable text
- Image Support - Convert images to Base64 and preview Base64 images
- File Upload - Upload any file to encode as Base64
- URL-Safe Mode - Generate URL-safe Base64 strings
- Drag & Drop - Simply drag images onto the tool
Combine with the URL Encoder for URL-safe data and the Hash Generator to verify file integrity.
What is Base64?
Base64 is a binary-to-text encoding scheme that represents binary data using 64 ASCII characters. It's commonly used for:
- Embedding images in HTML/CSS (data URIs)
- Encoding email attachments (MIME)
- Storing binary data in JSON or XML
- Transmitting data over text-based protocols
URL-Safe Base64
Standard Base64 uses characters that have special meaning in URLs (+ and /). URL-safe Base64 replaces these with - and _, making it safe for use in URLs and filenames.
Frequently Asked Questions
Is my data secure?
Yes! All encoding and decoding happens entirely in your browser. Your data is never sent to any server.
Is Base64 encryption?
No, Base64 is encoding, not encryption. It's easily reversible and provides no security. Anyone can decode Base64 data. For security, use proper encryption methods.
Why does Base64 make data larger?
Base64 encoding increases data size by approximately 33% because it represents 3 bytes of binary data using 4 ASCII characters.