Base64 Encoder & Decoder - Encode or Decode Base64 Strings
Encode text to Base64 or decode Base64 back to plain text.
Processed 100% locally in your browser. Never sent to our server.
About Base64 Encoder & Decoder - Encode or Decode Base64 Strings
Converts between UTF-8 text and Base64 encoding using the browser's built-in btoa/atob functions.
What Can You Use This Tool For?
Software engineers, web developers, and API designers use Base64 Encoder / Decoder to format production data, debug network requests, validate syntax errors, and streamline daily coding workflows without risking data leaks.
How to Encode and Decode Base64
1. Select either "Encode" or "Decode" mode.
2. Enter UTF-8 text or Base64 string into the input area.
3. The converted output generates instantly in real time.
Usage Examples
Encoding Text to Base64
Input: Hello Numvax! Output: SGVsbG8gTnVtdmF4IQ==
Frequently Asked Questions
Can I use this Base64 Encoder / Decoder offline without an internet connection?
Yes, once the web page is loaded in your browser, all parsing and code processing execute client-side using JavaScript without requiring active server connections.
Does Numvax log, save, or transmit my code/data?
Never. Numvax operates under a strict client-side privacy architecture. All operations execute strictly inside your local browser memory.
Is there a file size or character limit for this tool?
There is no artificial limit. The tool can process payloads as large as your device memory and browser can handle.
Is this Base64 Encoder / Decoder free for commercial use?
Yes, all Numvax developer tools are 100% free for personal, educational, and commercial development workflows with no subscriptions or accounts required.
Is Base64 encryption?
No. Base64 is a binary-to-text encoding scheme used for data transport, not secure encryption. Anyone can decode Base64 strings.
Does it support special characters and Unicode?
Yes, full UTF-8 support handles non-Latin characters, emojis, and symbols accurately.
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