Base64 Text Encoder/Decoder
Encode plain text to Base64 or decode Base64 back to readable text, fully client-side with UTF-8 and URL-safe support.
Base64 Output
SGVsbG8sIHdvcmxkISDwn5GL
Frequently Asked Questions
Is my data sent to a server when using the Base64 Text Encoder/Decoder?
No. The Base64 Text Encoder/Decoder is a fully client-side utility. All data processing, calculations, and conversions are handled locally in your browser. No input text, payloads, or keys are uploaded to any external server.
What is the difference between standard and URL-safe Base64?
Standard Base64 uses `+` and `/` characters and `=` padding, which can conflict with URL and filename syntax. URL-safe Base64 replaces `+` with `-` and `/` with `_`, and typically omits the `=` padding, making the output safe to embed directly in URLs, query strings, and file paths.
Does this tool handle emoji and non-Latin scripts correctly?
Yes. The encoder first converts your text to UTF-8 bytes before Base64 encoding, so emoji, accented characters, and non-Latin scripts (like Arabic, Chinese, or Cyrillic) round-trip correctly. Plain `btoa`/`atob` alone would corrupt these characters — this tool avoids that pitfall.
Is Base64 encoding a form of encryption?
No. Base64 is an encoding scheme, not encryption. It has no secret key and provides no confidentiality — anyone can decode Base64 text instantly. Never use it to protect sensitive data; use proper encryption for that.
What happens if I paste invalid Base64 into the decoder?
The tool will detect the malformed input and display a friendly error message instead of crashing, letting you correct the input and try again.
Does the Base64 Text Encoder/Decoder store history or cache my inputs?
No. The application runs entirely in browser memory. Once you refresh the tab, navigate away, or close the window, all inputted details, logs, and outputs are completely cleared.
Is the Base64 Text Encoder/Decoder compatible with mobile devices?
Yes. The interface is optimized to be fully responsive. You can perform calculations, conversions, and formats on all modern mobile, tablet, and desktop web browsers.
Does the Base64 Text Encoder/Decoder work offline?
Yes. Once loaded, all code and assets required to run the Base64 Text Encoder/Decoder reside in your browser cache, enabling offline use without an active network connection.