Generators
MD5 Generator
Generate MD5 hashes for text and files with verification support
Base64 Encoder/Decoder
Encode and decode Base64 text and files instantly
Base64 Encoder & Decoder
Base64 Encoder & Decoder Tool
Encode and decode Base64 text and files instantly in your browser. Base64 encoding converts binary data into ASCII text format, making it safe for transmission over text-based protocols like email, JSON, and XML. Our tool supports both encoding and decoding with file upload capabilities.
Bidirectional encoding and decoding with support for both text and file inputs. The tool handles files up to 5MB, validates Base64 strings before decoding, provides formatted output with line breaks for readability, shows size information for encoded data, and includes error handling for invalid input.
Essential for embedding images in HTML/CSS, encoding binary data for JSON APIs, email attachment encoding, data URLs for web development, encoding files for transmission, debugging Base64-encoded data, and preparing data for REST APIs.
Instant encoding and decoding with no delays, complete privacy as all processing is local, supports both text and file inputs, validates Base64 format before decoding, shows decoded data size, formats output for readability, and handles files up to 5MB.
Key Features
- Encode text to Base64
- Decode Base64 to text
- File encoding support (up to 5MB)
- Base64 format validation
- Formatted output with line breaks
- Size calculation for encoded data
- Copy to clipboard
- Clear and intuitive interface
- Browser-based (no uploads)
- Free and unlimited usage
Base64 Encoder/Decoder FAQ
What is Base64 encoding?
Base64 is a binary-to-text encoding scheme that converts binary data into ASCII text using 64 printable characters (A-Z, a-z, 0-9, +, /). It's used to safely transmit binary data over text-based protocols.
Does Base64 encoding encrypt data?
No! Base64 is NOT encryption. It's simply an encoding format that makes binary data text-safe. Anyone can decode Base64 without a key. Never use Base64 alone for sensitive data.
Why does Base64 increase file size?
Base64 encoding increases data size by approximately 33% because it represents 3 bytes of binary data using 4 ASCII characters. This overhead is the trade-off for text-safe transmission.
What's the '=' at the end of Base64 strings?
The '=' characters are padding added when the input length isn't divisible by 3. Padding ensures the Base64 string length is divisible by 4, maintaining proper encoding structure.
Can I decode any Base64 string?
You can only decode valid Base64 strings that follow the proper format (A-Z, a-z, 0-9, +, /, =). Our tool validates the format before decoding and shows an error for invalid strings.
Pro Tips
- Base64 is not encryption - don't use it for security
- Great for embedding images in HTML/CSS (data URLs)
- Essential for sending binary data in JSON APIs
- Use formatting for better readability in code
- Expect ~33% size increase when encoding
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