Blog
Guides on data formats, encoding, and the tools that work with them.
July 10, 2026
JSON vs. XML vs. CSV: Which Data Format Should You Use?
A practical comparison of the three most common data-interchange formats — when each one makes sense, and when it doesn't.
July 11, 2026
How to Decode a JWT Token (And What the Claims Actually Mean)
JSON Web Tokens show up everywhere in modern auth systems. Here's what's actually inside one, and how to read it.
July 12, 2026
Regex Cheat Sheet: Common Patterns Every Developer Needs
The regex patterns you'll actually reach for on a regular basis, explained plainly — not a reference manual, a working cheat sheet.
July 13, 2026
SQL Formatting: Why Readable Queries Matter (And How to Get There Fast)
Messy SQL isn't just ugly — it's slower to debug, harder to review, and easier to break. Here's why formatting matters and what good SQL actually looks like.
July 13, 2026
Base64 Encoding Explained: What It Actually Does and When to Use It
Base64 shows up in data URLs, email attachments, and API tokens constantly — but what is it actually doing, and why does the output always look like that?
July 14, 2026
How to Generate a Strong Password (And Why Length Beats Complexity)
Most password advice focuses on the wrong variable. Here's what actually makes a password hard to crack.
July 15, 2026
Understanding Unix Timestamps: Why Computers Count Time in Seconds
Every 'exp' field, every 'created_at' column, every log file — they're all built on one number. Here's what it actually means.
July 16, 2026
UUID vs. Auto-Increment ID: Choosing the Right Primary Key
Every database table needs a way to uniquely identify rows. Here's the real tradeoff between the two most common approaches.
July 17, 2026
URL Encoding: Why %20 Shows Up Everywhere
Spaces, ampersands, question marks — certain characters break URLs unless they're encoded first. Here's what's actually happening.
July 18, 2026
CSV, JSON, XML, and Excel: A Practical Guide to Converting Between Them
Nine different converters, one underlying question: what actually happens to your data structure when you move between these four formats?
July 19, 2026
Binary to Text: How Computers Actually Store Characters
Every character you type is a number underneath. Here's how strings of 1s and 0s become the text on your screen.
July 20, 2026
CSV to JSON: What Actually Happens to Your Data
Converting a spreadsheet export to JSON looks trivial, but a few decisions in the process determine whether the result is actually usable.
July 21, 2026
JSON to XML: Converting Between a Data Format and a Document Format
JSON and XML both support nested structure, but they represent it differently. Here's what changes when you convert one to the other.
July 22, 2026
XML to JSON: Taming Attributes, Namespaces, and Mixed Content
Converting XML to JSON is more than a format swap — XML has several constructs JSON simply can't represent the same way.
July 23, 2026
CSV to XML: Turning Rows into Elements
CSV has no native concept of a record wrapper the way XML does. Here's how a converter decides what your rows should look like as XML.
July 24, 2026
XML to CSV: Flattening a Hierarchy into a Grid
XML's nesting doesn't survive a trip to CSV intact. Here's what a converter has to decide when it collapses a tree into rows and columns.
July 25, 2026
Excel to CSV: What Survives the Conversion and What Doesn't
CSV can't hold everything an XLSX file can. Here's exactly what gets stripped out when you convert, so nothing catches you by surprise.
July 26, 2026
CSV to Excel: Turning Plain Text into a Real Spreadsheet
Going from CSV to XLSX adds capability rather than losing it — but a few gotchas around encoding and types are worth knowing about.
July 27, 2026
Excel to XML: Getting Spreadsheet Data into a Schema-Friendly Format
Enterprise systems often want XML, not spreadsheets. Here's what actually happens when tabular Excel data becomes structured XML.
July 28, 2026
XML to Excel: Making Structured Data Spreadsheet-Friendly
XML's flexibility becomes a liability the moment you need a spreadsheet. Here's how a converter reconciles the two.
July 29, 2026
SQL Injection: How It Works and How Parameterized Queries Stop It
SQL injection has been on the OWASP Top 10 for two decades and it's still one of the most damaging bugs a web app can ship. Here's the mechanism, in plain terms.
July 30, 2026
JWT Algorithm Confusion: The Attack That Exploits Trusting the Token's Own Header
One of the more subtle JWT vulnerabilities comes from a design quirk most developers don't expect: the token gets to declare its own signing algorithm.
August 1, 2026
Common JSON Syntax Errors and How to Fix Each One
Trailing commas, single quotes, unquoted keys — the errors that break JSON parsing most of the time, and exactly how to spot them.
August 2, 2026
Regex Lookahead and Lookbehind, Explained With Real Examples
Zero-width assertions let you match a pattern only if it's followed or preceded by something else — without including that part in the result.
August 3, 2026
Base64 vs. Base64URL: Why JWTs Use a Different Alphabet
Two characters and the padding are different — but that small change is exactly why JWTs can sit safely inside a URL or header.
August 4, 2026
How to Generate a UUID in JavaScript, Python, and SQL
One line of code in most languages today — here's the exact syntax for each, plus which method to actually trust.
August 5, 2026
The Year 2038 Problem: Why Some Unix Timestamps Will Break
A 32-bit Unix timestamp runs out of room on January 19, 2038. Here's what breaks, why, and whether you need to worry about it.
August 6, 2026
How Long Would It Take to Crack Your Password?
The honest answer depends on length far more than complexity — here's the actual math, with real crack-time numbers.
August 7, 2026
Why Your CSV Won't Parse: Delimiters, Quotes, and Line Endings
Most CSV import failures trace back to just four things. Here's how to spot each one before it corrupts your data silently.
August 8, 2026
XML Namespaces Explained: What xmlns Actually Does
Two different XML documents can both use a <title> element and mean completely different things by it. Namespaces are how XML tells them apart.
August 9, 2026
Why Excel Dates Look Wrong After Exporting to CSV
A date that looks perfectly normal in Excel can turn into a five-digit number or a scrambled MM/DD swap the moment it hits CSV. Here's why.
August 10, 2026
Query Strings vs. Path Parameters: Building URLs Safely
Both put data into a URL, but they answer different questions — and mixing them up, or encoding neither correctly, is a common source of broken links.
August 11, 2026
ASCII vs. Unicode: Why One Byte Isn't Always Enough
ASCII maxes out at 256 characters. Unicode covers over a million. Here's how UTF-8 bridges the two without breaking older ASCII text.
August 12, 2026
Flattening Nested JSON for CSV: What Happens to Arrays and Deep Objects
Dot notation handles nested objects cleanly. Arrays are a different story — here's exactly what a converter does with each.
August 13, 2026
How JSON Arrays Become Repeated XML Elements
XML has no array type — repetition is how it represents a list. Here's the convention converters use, and where it gets ambiguous.
August 14, 2026
CSV to XML: Handling Encoding, Special Characters, and Escaping
A stray & or < in a CSV cell can produce invalid XML if it isn't escaped first. Here's what a correct converter actually does.
August 15, 2026
Flattening Nested and Repeated XML Elements to CSV
Simple, uniform XML flattens to CSV cleanly. Here's what happens the moment nesting or repetition inside a single record gets more complex.
August 16, 2026
CSV to Excel: Keeping Leading Zeros and Long IDs From Getting Mangled
A ZIP code or long ID that looks fine in your CSV can come out wrong the moment Excel decides it's 'really' a number. Here's why, and the fix.
August 17, 2026
Converting a Multi-Sheet Excel Workbook to XML
XML has no built-in idea of 'sheets' the way a workbook does. Here's how that gap actually gets bridged.
August 18, 2026
Turning a SOAP API Response Into an Excel Report
SOAP responses are XML wrapped in an envelope, header, and body — here's what actually needs stripping before the data becomes a usable spreadsheet.
August 19, 2026
How Data URLs Work: Embedding Images With Base64
A data URL lets an image live directly inside your HTML or CSS instead of as a separate file request — here's the format and when it's actually worth using.