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Base64 Tool – Encodes text or data into Base64 format, or dec...

The Base64 Tool encodes text or data into Base64 format, or decodes Base64 back to its original form. This Base64 Tool processes data directly in your browser — no server required. Results appear instantly and your data isn't transmitted anywhere.

The formula behind this calculator: Converts binary data into an ASCII string using a 64-character alphabet, or reverses the process. As a practical example: The text 'Hi' encodes to 'SGk=' in Base64. All results are calculated instantly in your browser — no data is stored or transmitted.

Base64 Tool FAQ

What does the Base64 Tool calculate?

Encodes text or data into Base64 format, or decodes Base64 back to its original form.

Does Base64 increase data size?

Yes — Base64-encoded data is approximately 33% larger than the original binary data, because 3 bytes of binary become 4 ASCII characters.

What is URL encoding used for?

URL encoding (percent-encoding) converts characters that are not safe in URLs (spaces, special characters) into a % followed by their hexadecimal code. Required for query strings and form submissions.

Does this work on mobile?

Yes — fully responsive and optimised for smartphones, tablets, and desktop browsers.