Base64 Encoder/Decoder
Instantly encode and decode Base64 data with secure client-side processing
Input Data
Output Result
Options
When to Use Base64 Encoder/Decoder
API Authentication
Encode username:password combinations for HTTP Basic Authentication headers in REST API calls and web services.
File Data Transmission
Convert binary files to text format for safe transmission over text-based protocols like HTTP, SMTP, or JSON APIs.
Image Embedding
Embed images directly in HTML, CSS, or XML documents using data URIs without external file dependencies.
Email Attachments
Encode binary attachments for MIME email transmission, ensuring compatibility across different email systems and servers.
Data Obfuscation
Basic obfuscation of sensitive data in configuration files or URLs, though not a security measure by itself.
Web Development
Handle binary data in web applications, encode form data, or process file uploads in JavaScript applications.
Frequently Asked Questions
What is Base64 encoding?
Base64 is an encoding scheme that converts binary data into ASCII text format using 64 printable characters (A-Z, a-z, 0-9, +, /). It's commonly used for data transmission over text-based protocols and API authentication, ensuring data integrity during transfer.
How do I use this Base64 encoder/decoder?
Simply select encode or decode mode, paste your text or upload a file in the input area, and click the Convert button. The result appears instantly in the output area. You can then copy the result or download it as a file.
Is this Base64 tool free to use?
Yes, our Base64 encoder/decoder is completely free to use with no registration required. There are no usage limits, file size restrictions (up to 10MB), or hidden costs. Use it as often as you need.
Is my data safe when using this tool?
Absolutely. All encoding and decoding happens entirely in your browser using client-side JavaScript. No data is sent to our servers, stored anywhere, or shared with third parties. Your privacy is completely protected.
What file formats are supported?
Our tool supports all text files and binary files including images (JPG, PNG, GIF), documents (PDF, DOC, XLS), audio (MP3, WAV), video files, and more. Maximum file size is 10MB for optimal performance.
Can I use this for API authentication?
Yes, you can encode username:password combinations for HTTP Basic Authentication headers. The tool is perfect for generating API authentication tokens and testing REST API calls that require Base64-encoded credentials.
How do I decode Base64 back to original format?
Select 'Decode' mode, paste your Base64 encoded text in the input area, and click Convert. For text data, the result appears in the output area. For binary files, use the download button to save the decoded file to your computer.
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