Encode text to Base64 or decode Base64 back to plain text.
Key Features of Base64 Encoder/Decoder
- Bi-Directional Conversion Seamlessly switch between encoding plain text to Base64 ASCII and decoding Base64 strings back to clean plain text.
- Browser-Based Security Performs all conversion logic locally inside your browser window. Zero network requests mean your sensitive strings never cross the internet.
- Support for UTF-8 Correctly handles special characters, symbols, and non-English scripts using advanced browser encoding standards.
- Quick-Copy & Clear Single-click copy buttons for instant saving to your clipboard and clear options to reset the canvas immediately.
Base64 Encoder/Decoder Examples
Encoding Plain Text to Base64
Translate a standard human-readable text string into its corresponding Base64-encoded representation.
Input
Hello, World! 🚀Output
SGVsbG8sIFdvcmxkISDwnm9IDecoding Base64 back to Plain Text
Decode a Base64-encoded ASCII sequence back into original UTF-8 string format.
Input
WW9yYWJhLkNvbSAtIERldmVsb3BlciBIdWI=Output
Yoraba.Com - Developer HubHow to Use Base64 Encoder/Decoder
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Input your raw data
Paste or type your plain text or raw Base64 string into the input field.
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Choose action
Click 'Encode' to convert plain text into Base64 format, or click 'Decode' to translate Base64 back to readable text.
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Copy output
Click 'Copy' to instantly save the processed output to your clipboard, or 'Clear' to start over.
Common Use Cases for Base64 Encoder/Decoder
- Creating Data URIs Encode small images, SVG icons, or fonts into Base64 strings to inline directly within CSS stylesheets or HTML documents.
- API and Webhook Authorization Generate Basic Auth header credentials by encoding `username:password` pairs into safe transfer strings.
- Transferring Binary-Like Data Convert text containing special symbols into plain ASCII to safely pass across network protocols that reject special characters.
The Technical Details
Base64 is a binary-to-text encoding scheme that represents binary data in an ASCII string format. It is designed to carry data across channels that only support text content, such as email bodies or URL query parameters. Base64 divides every 3 bytes (24 bits) of data into 4 groups of 6 bits each, mapping each group to one of 64 safe printable characters: A-Z, a-z, 0-9, +, and /. Because 3 bytes become 4 characters, Base64 encoding increases data size by approximately 33%.
When handling non-ASCII text (like emojis or foreign scripts), standard JavaScript functions like btoa and atob will crash. Our tool utilizes advanced multi-byte text wrapping (TextEncoder and standard URI component replacement) to ensure that all UTF-8 characters are encoded and decoded perfectly without losing formatting or raising script errors.
Frequently Asked Questions
Is Base64 encoding secure?
No, Base64 is an encoding format, not an encryption method. Anyone can easily decode a Base64 string back to its original form. Never use Base64 to secure sensitive or confidential data.
What is the padding character `=` used for?
The `=` padding character is appended to the end of a Base64 string when the original input size is not a multiple of 3 bytes. It ensures the encoded string length is a multiple of 4, helping decoders process the data in chunks.
Does this tool send my data to any servers?
No, all encoding and decoding operations are executed entirely client-side in your web browser using JavaScript. Your text never leaves your device, ensuring total privacy.
What are the common characters in the Base64 alphabet?
Base64 uses 64 printable characters: uppercase English letters (A-Z, 26 chars), lowercase English letters (a-z, 26 chars), digits (0-9, 10 chars), and plus (+) and slash (/) for the last two values, with '=' used for padding.
Why do some systems use Base64URL encoding instead?
Standard Base64 contains characters like '+' and '/' which have special meanings in URLs (as query separators and path delimiters) and '=' which is used in parameters. Base64URL replaces '+' with '-' (minus) and '/' with '_' (underscore), and typically drops the '=' padding characters to make the strings safe for direct transmission in URLs and filenames.
Can I encode large files here?
This tool is optimized for text blocks and strings. For extremely large multi-gigabyte binary files, browser memory limits might freeze client-side tabs, so we recommend using terminal-based utility scripts for massive asset processing.