Frequently Asked Questions
What is Base64 encoding and when should I use it?
Base64 encoding converts binary data into ASCII text, commonly used
for embedding images in HTML/CSS, email attachments, and API
payloads. Use Base64 URL Safe encoding when the output needs to be
used in URLs without + and / characters.
What is the difference between Base64 and Base64URL?
Standard Base64 uses + and / characters which are not URL-safe.
Base64URL replaces + with - and / with _, and removes the = padding,
making the output safe to use in URLs and filenames.
What is URL encoding?
URL encoding (percent encoding) converts special characters in a URL
to %XX format. For example, spaces become %20. This ensures URLs
remain valid when they contain reserved characters or non-ASCII
text.
Are these encoding tools secure?
Yes, all encoding and decoding operations are performed entirely in
your browser using JavaScript. No data is sent to any server,
ensuring your sensitive information remains completely private.
What is ROT13 and is it secure encryption?
ROT13 is a simple letter substitution cipher that shifts each letter
by 13 positions. It is NOT secure encryption — it is easily
reversible and used primarily for hiding spoilers or casual
obfuscation. For real encryption, use the Text Encrypt/Decrypt tool
with AES-256.