Add the requested inputs
Use the labelled fields in the workspace above. If example values are provided, try them first or replace them with your own.
Developer tools · Free online tool
Base64 encoder & decoder
Encode Unicode text to Base64 or decode Base64 and Base64URL safely.
3 guest runs per rolling 24 hours10 with a free accountPrivate inputsMobile-friendly
Base64 encoder & decoder workspace
Runs locally in your browser
Base64 changes representation; it does not encrypt or secure the content.
Result
Use it with confidence
How to use the base64 encoder & decoder.
Calculate and review
Use the main action when needed. TextEncoder and TextDecoder bridge UTF-8 bytes while the browser handles Base64 byte representation.
Try a worked example
Encode a UTF-8 string containing emoji, or inspect a Base64URL payload with missing padding.
Check the assumptions
Base64 is an encoding, not encryption. Anyone can decode it and it should not protect secrets.
Helpful answers
Base64 encoder & decoder FAQs.
Is the base64 encoder & decoder free?
Yes. Guests receive 3 runs per rolling 24 hours, verified free accounts receive 10, and Premium subscribers receive unlimited normal use.
Does UtilHub upload or save my inputs?
No. This tool runs in your browser and UtilHub does not receive or store the values you enter. Your browser or device may still retain normal local history or form data.
How does this base64 encoder & decoder work?
TextEncoder and TextDecoder bridge UTF-8 bytes while the browser handles Base64 byte representation.
What should I check before using the result?
Base64 is an encoding, not encryption. Anyone can decode it and it should not protect secrets.