Encode and Decode Base64 Data
Base64 is a fundamental encoding scheme used in web development to safely transmit binary data across text-based protocols like HTTP and SMTP. Our Base64 Encoder & Decoder allows you to instantly convert strings, API tokens, and data URIs back and forth.
Common Use Cases for Base64
- Web Development: Encoding small images into Data URIs to embed them directly into CSS or HTML, saving HTTP requests.
- API Authentication: Basic Auth headers require username and password credentials to be sent as a Base64 encoded string.
- Data Transfer: Ensuring that complex characters and symbols aren't corrupted when passed through legacy systems.
Security Note
Base64 is an encoding format, not encryption. It provides zero security. Never use Base64 to 'hide' passwords or sensitive data, as anyone can decode it instantly.
How to Use This Tool
- Upload or Input Data: Select your file or paste your data directly into the tool interface. Everything remains on your device.
- Configure & Process: Adjust any optional settings if necessary. The tool will process your data instantly inside your browser.
- Download Result: Preview the output and click the download or copy button to save your final results.
Frequently Asked Questions
Can I encode files to Base64?
Yes, we offer a dedicated 'File to Base64' tool that allows you to upload images or PDFs and receive the encoded text.
Does this support UTF-8 characters?
Yes, the tool correctly encodes international characters, emojis, and symbols by converting them to UTF-8 before applying the Base64 algorithm.
Is it safe to paste API tokens here?
Yes, because the tool is 100% client-side JavaScript. No data is ever logged or sent to our servers.