Developer & Data
Calculate HMAC With Matching Keys and Output Formats
A shared secret changes a message authentication code. Two systems must agree on the message bytes, key, algorithm and output representation before…
Category: Developer & Data
Developer & Data
Generate a Checksum and Compare the Exact Input
A checksum is useful when you want to know whether two inputs match at the byte level. Even a small edit can…
Developer & Data
Extract Readable Text From Small HTML Snippets
Copied HTML can include navigation, styling and scripts around the sentence you need. Removing those elements can produce a useful text draft,…
Developer & Data
Convert HTML Entities While Keeping Output as Text
A less than sign can be ordinary text or the beginning of a tag. Entity encoding lets you represent that character in…
Developer & Data
Build Query Strings With Repeated Parameters
Joining URL parameters looks simple until one value contains an ampersand. That ampersand belongs inside the value, but an unencoded version can…
Developer & Data
Inspect URL Parts Without Opening the Address
A long URL can hide useful details in plain sight. Its hostname, port, path and query string describe different parts of the…
Developer & Data
Encode URL Components Without Changing Their Meaning
A URL containing a space, an ampersand or a plus sign can be misread when it is assembled by hand. Encoding a…
Developer & Data
Encode Base64 and Read Decoded Bytes Safely
Base64 changes how bytes are represented. It does not encrypt them. Anyone with the encoded string can attempt to decode it, so…
Developer & Data
Change Letter Case Without Rewriting the Text
Uppercase, lowercase and title case can help standardise labels. They do not repair spelling or make a name official. A case conversion…
Developer & Data
Understand What a Text Counter Actually Counts
A text limit can refer to visible characters, Unicode code points or bytes. Those are not always the same thing. This matters…