Online Base64 Encoder & Decoder 2026 –Secure & Instant

Convert text and files with our enterprise-grade local tool. No sign-up, no logs, and 100% private—all processing happens on your device, ensuring your sensitive data never touches the cloud.

Input0 chars
Output0 chars
🔒 100% Secure: This tool is fully client-side. Your data never leaves your computer.
Runs entirely in your browser. No data is sent anywhere.

Practical Base64 Examples

1. Text Encoding (UTF-8)
Input: Hello World
Output: SGVsbG8gV29ybGQ=
2. URL-Safe Base64
Replaces + with - and / with _ for safe web routing and API tokens.
3. Image to Data URI
Converts small icons/images into data:image/png;base64,... for faster CSS and HTML rendering.

How to Use the Base64 Converter

  1. Input Your Data: Paste your raw text or Base64 string into the input area. You can also drag and drop files (JPG, PNG, PDF, TXT) for instant file-to-Base64 conversion.
  2. Select Mode: Use “Auto-detect” for instant results, or manually click “Encode” for text-to-Base64 and “Decode” for Base64-to-text.
  3. Apply Advanced Settings: Toggle “URL-Safe” if you are using the output for web links, or remove “Padding” to clean up the string.
  4. Copy or Download: One-click “Copy Result” to your clipboard or use the output stats to verify character count and byte size.

Why Choose Our Privacy-First Tool?

In regions like the USA, UK, and EU, data privacy is paramount. Unlike other online converters that send your data to their servers, our tool uses Client-Side JavaScript execution.

  • No Data Leakage: Your sensitive strings and files never leave your local machine.
  • Blazing Fast: No server latency. Conversions are processed at the speed of your CPU.
  • Unicode Support: Full compatibility with UTF-8, emojis, and special symbols.

Frequently Asked Questions

1. Is this Base64 decoder safe for passwords?
Yes. Since the tool runs entirely in your browser, no one—not even our servers—can see the data you enter.

2. Does it support large file encoding?
Absolutely. You can upload images, PDFs, or text files to get an instant Base64 string without any file size limits imposed by a server.

3. What is the difference between standard and URL-safe Base64?
URL-safe encoding replaces characters that have special meanings in URLs (+ and /) to ensure the string remains intact when passed through a web address.

4. Do I need to sign up to use this tool?
No. We believe in open-access tools. There are no registrations, no ads, and no hidden fees.

5. Can I use this offline?
Yes. Once the page is loaded, the logic is stored in your browser’s cache, allowing you to use it without an active internet connection.

Want to learn more about Base64?

Read our comprehensive guide on how Base64 encoding works and why it is essential for modern web development.

Read the Full Blog Post ➔

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