Base64 Encoder & Decoder Online (Text, URL & File)
Encode text, binary files, and images to Base64 or decode Base64 strings back to plain text. Full support for UTF-8 and URL-safe Base64 standards.
Why Use Base64 Encoder & Decoder?
Base64 Encoder & Decoder provides instant, browser-based execution designed for developers, security professionals, and everyday web users. Built with high-performance client-side and ephemeral server algorithms, it delivers production-grade results without requiring user registration, software downloads, or subscription fees.
How to Use Base64 Encoder & Decoder
- Select Encode or Decode mode depending on your workflow.
- Paste your text or upload a binary file/image into the input field.
- Toggle URL-Safe mode if using Base64 strings in web query parameters.
- Copy the resulting Base64 string or download the decoded binary file.
Key Features & Security Standards
Client-Side & In-Memory Privacy
All computations, transformations, and string manipulations execute in your local browser memory or isolated ephemeral worker instances with zero permanent disk persistence.
Zero File or Data Retention
Your sensitive files, JWT keys, credentials, and code snippets are never shared, logged, or indexed. Data is automatically flushed as soon as your browser tab closes.
100% Free & Unlimited Usage
No credit cards, sign-ups, subscriptions, or watermarks. All Base64 Encoder & Decoder features are accessible without rate limitations or intrusive paywalls.
Frequently Asked Questions
What is Base64 encoding?+
Base64 is a binary-to-text encoding scheme that represents binary data in an ASCII string format using 64 printable characters.
What is URL-Safe Base64?+
URL-safe Base64 replaces the '+' and '/' characters with '-' and '_' so the string can be transmitted safely in URL parameters without percent-encoding.
Can I generate Base64 Data URIs for images?+
Yes, drop an image to generate an instant 'data:image/png;base64,...' URI ready for HTML and CSS embedding.
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