Base64 Encoder & Decoder
Easily encode text or files to Base64 and decode Base64 strings online with our free, secure Base64 Encoder & Decoder. Perfect for developers handling API data, debugging web responses, or preparing encoded content. All processing is local and private—no uploads or data storage.
Runs in your browser
WebAssembly, no server
No signup required
Open and use instantly
Files stay private
Nothing leaves your device
How It Works
Enter or paste your text in the input area
Choose 'Encode to Base64' or 'Decode from Base64'
Click the process button to start conversion
Key Features
- Encode text and strings to Base64 format
- Decode Base64 back to original text
- Fast browser-native encoding/decoding
- No file size limits or content restrictions
- 100% browser-based processing - no uploads required
- Drag-and-drop interface for easy input
- Instant processing with real-time results
- Mobile-friendly responsive design
- Secure local processing with complete privacy
- Copy results to clipboard with one click
- Download encoded/decoded results as files
- Support for data URIs and web standards
- Batch processing for multiple text inputs
- Unicode and special character support
- URL-safe Base64 encoding options
- Detailed encoding statistics and information
About This Tool
Encode and decode Base64 online for free with our fast and secure Base64 encoder/decoder tool. Convert text, strings, and data to Base64 format for safe transport in JSON APIs, URLs, HTML data URIs, email attachments, and web applications. Decode Base64 back to its original text format instantly. Perfect for developers, programmers, and anyone working with encoded data. Our browser-based tool processes everything locally - no uploads, no data storage, complete privacy. Supports drag-and-drop workflows, instant processing, and works on all devices. Note that Base64 is encoding (not encryption) and increases data size by approximately 33%. Ideal for embedding images in CSS/HTML, API authentication, data serialization, and secure data transport.
Frequently Asked Questions
Base64 encodes binary data into text format for safe transport in JSON, URLs, HTML, email attachments, and APIs.
Base64 is encoding, not encryption. It makes binary data safe for text transport but doesn't provide security.
Yes, Base64 encoding increases the data size by approximately 33% due to the encoding overhead.
Yes, our responsive design works perfectly on phones, tablets, and all mobile devices.
No, all processing happens locally in your browser. Your data never leaves your device.
All text including Unicode, special characters, emojis, and binary data converted to text.
No limits! Process text of any length with our browser-based processing.
Yes, includes options for standard and URL-safe Base64 encoding variants.
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