Kostenloser Base64-Kodierer & Dekodierer
Text in Base64 kodieren und Base64-Zeichenfolgen im Browser dekodieren.
Frequently Asked Questions
What is Base64 encoding and why is it used?
Base64 converts binary data to a text-safe format using only 64 printable ASCII characters (A-Z, a-z, 0-9, +, /). It's used to embed images in CSS/HTML, encode email attachments, and transmit binary data over text-based APIs.
Is Base64 the same as encryption?
No. Base64 is encoding, not encryption — it changes the format without adding security. Anyone can decode Base64 trivially. Never use Base64 to protect sensitive data; use real encryption (AES, TLS) instead.
How much larger is Base64 output than the original data?
Base64-encoded data is approximately 33% larger than the original. Every 3 bytes of input becomes 4 ASCII characters. A 1 MB image becomes ~1.37 MB as Base64.
What is the difference between standard Base64 and URL-safe Base64?
Standard Base64 uses + and / which are special characters in URLs. URL-safe Base64 replaces + with − and / with _ making it safe for use in URL parameters and file names without percent-encoding.
Can I encode images to Base64 for CSS backgrounds?
Yes. Upload an image and copy the Base64 string, then use it as: background-image: url("data:image/png;base64,YOUR_BASE64_HERE"). This embeds the image directly in CSS, reducing HTTP requests for small icons.
Is the Base64-Kodierer free to use?
Yes, the Base64-Kodierer on Allio Tools is completely free with no sign-up or registration required. It works directly in your browser.
How does the Base64-Kodierer work?
Text in Base64 kodieren und Base64-Zeichenfolgen im Browser dekodieren. No data is sent to a server — everything runs locally in your browser for maximum privacy and speed.
Do I need to install anything to use the Base64-Kodierer?
No installation needed. The Base64-Kodierer runs entirely in your web browser on any device — desktop, tablet, or mobile.
Is my data safe when using the Base64-Kodierer?
Completely safe. The Base64-Kodierer processes everything locally in your browser. No input data, results, or usage information is ever transmitted to or stored on any server.
Does the Base64-Kodierer work offline?
After the page loads for the first time, the Base64-Kodierer works without an internet connection for all client-side processing. Tools that fetch live external data (such as DNS or network lookups) require an active connection.
Can I use the Base64-Kodierer output in commercial projects?
Yes. The Base64-Kodierer is a utility tool and its output carries no licensing restrictions. You are free to use results in any project, commercial or personal.
Does the Base64-Kodierer follow official standards?
Yes. The Base64-Kodierer is built to comply with the relevant industry standard or specification for this utility type. If you encounter an unexpected result, verify your input against the specification — edge cases outside the standard may produce undefined behaviour.
Does the Base64-Kodierer work on all browsers?
Yes. The Base64-Kodierer is built with standard browser APIs and works on all modern browsers including Chrome, Firefox, Safari, and Edge — on both desktop and mobile. No plugins, extensions, or third-party software are required.
How do I save or export my results from the Base64-Kodierer?
Select and copy the result text to paste into any document or app. For image tools, a Download button saves the file directly to your device. Your browser's built-in screenshot function also captures results quickly. No account or login is required.