Data Encoding & Formatting
Base64, percent-encoding, and a regex tester.
Base64 Encoder/Decoder
Encode text to Base64 or decode it back.
URL Encoder/Decoder
Percent-encode or decode text and URLs.
Regex Tester
Test a regex against text with live match highlighting.
Data Encoding and Formatting
Encoding is the process of converting data from one form to another for standard processing. Unlike encryption, encoding is not intended to hide data or provide security; it simply ensures that data can be safely transmitted or stored in systems that have specific format requirements.
Base64 Encoding
Base64 is a binary-to-text encoding scheme used to represent binary data in an ASCII string format. Its primary purpose is to ensure that data remains intact without modification during transport across systems that only support text-based protocols. For example, Base64 allows binary data (such as images, files, or encrypted data) to be sent over media that only support ASCII text, such as email (via MIME) or embedded directly into JSON payloads.
It's important to note that Base64 is not encryption. It provides no security or confidentiality. Furthermore, Base64 encoding increases the size of the original data by approximately 33%.
URL (Percent) Encoding
Percent encoding is a mechanism used to represent characters in a Uniform Resource Identifier (URI) that are otherwise restricted or have special meanings. It replaces unsafe or reserved characters with a % followed by their two-digit hexadecimal representation.
URLs are restricted to a specific set of US-ASCII characters, and many characters (such as &, ?, /, and #) have specific functional meanings in a URL structure. Percent encoding ensures that if these characters appear within the data (like a search query), they are treated as literal text rather than as part of the URL's structure, preventing conflicts and ensuring data integrity.
Regular Expressions (Regex)
A regular expression is a sequence of characters that specifies a search pattern. They are widely used in programming and text processing to find, validate, extract, or replace specific strings of text based on complex rules. While extremely powerful, regular expressions can be notoriously difficult to read and debug, which is why live testing tools are invaluable for developers.
Frequently Asked Questions
Is Base64 encoding a type of encryption?
No. Base64 is an encoding scheme, not encryption. It does not use a key and provides no security. Its sole purpose is to convert binary data into a safe, ASCII text format so it can be transmitted over systems that only support text (like email or JSON payloads).
Why do URLs need to be percent-encoded?
URLs have reserved characters (like ?, &, /, and #) that define their structure. If your data contains these characters (e.g., a search query with an &), percent-encoding converts them into a safe format (like %26) so the browser doesn't confuse your data with the URL's structural commands.
What is a regular expression (Regex)?
A regular expression is a sequence of characters that specifies a search pattern. It is widely used in programming and text processing to find, validate, extract, or replace specific strings of text based on complex rules, such as validating an email address format or extracting phone numbers from a document.