Base64 Encode / Decode
What Is Base64?
Base64 is a way of encoding binary or text data using only 64 printable ASCII characters. It's commonly used to safely embed data - such as images or credentials - inside text-based formats like JSON, XML, or URLs.
How to Use This Base64 Encode / Decode
- Fill in the input fields on the left with your own numbers - every field is pre-filled with a sample value so you can see the layout working immediately.
- Click the Calculate button to instantly generate your result in the panel on the right.
- Read your result, along with the supporting breakdown table and chart, to understand not just the answer but how it was reached.
- Change any value and click Calculate again as many times as you like - there is no limit on how often you can use the base64 encode / decode, and nothing is saved or sent anywhere.
Frequently Asked Questions
Is Base64 encryption?
No - Base64 is only an encoding scheme, not encryption. Anyone can decode Base64 text instantly, so it should never be used to protect sensitive information.
Does this tool send my data anywhere?
No, all encoding and decoding happens locally in your browser using JavaScript; nothing is uploaded to any server.
Tips for Getting Accurate Results from the Base64 Encode / Decode
- Double-check every input before calculating - a misplaced decimal point or wrong unit is the most common cause of an unexpected result.
- Make sure the units shown next to each field (kg, cm, %, hours, and so on) match the units of the number you are typing in; convert first if they don't.
- If a result looks off, try the calculation with round, simple numbers first (like 10 or 100) to confirm the tool is behaving the way you expect, then switch back to your real figures.
- Bookmark or save this page if you use the base64 encode / decode regularly, since all calculations run instantly in your browser with no sign-up required.
How to Print or Save This Base64 Encode / Decode as a PDF
- Fill in your values and click Calculate.
- Click the Print link at the top of the page.
- In the print dialog that opens, choose "Save as PDF" as the destination (instead of a physical printer) to download a PDF copy.
- Make sure "Background graphics" is turned on in the print settings so the colors print exactly as shown on screen.
- Click Save or Print - only the base64 encode / decode's inputs and results are included; the site navigation, sidebar, footer, and the theory/FAQ sections below are automatically left out to keep the printout clean and focused.
More Frequently Asked Questions
Is this base64 encode / decode free to use?
Yes, completely free, with no registration, download, or watermark - just enter your numbers and get an instant result.
Does this calculator work on mobile phones?
Yes, the layout automatically adjusts for phones and tablets, so you can use the base64 encode / decode on any device with a modern web browser.
Is my data stored or sent anywhere?
No - every calculation on this page runs locally in your own browser using JavaScript; nothing you type is uploaded, logged, or stored on any server.
Can I rely on this for professional or legal decisions?
This tool is designed to give a fast, well-informed estimate for everyday use. For decisions with financial, legal, medical, or safety consequences, always confirm the figures with a qualified professional in that field.