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Every page on TweakPad in one place — all 55 tools and all 104 articles, grouped by category. If you would rather browse than search, start here.

Tools
Articles
Category hubs

All 55 tools

JSON Tools

JSON Formatter
JSON Beautifier
JSON Minifier
JSON Validator
JSON Schema Validator

Code Formatters

SQL Formatter
HTML Formatter
CSS Formatter
JavaScript Formatter
XML Formatter
YAML Formatter

Minifiers

SQL Minifier
HTML Minifier
CSS Minifier
JavaScript Minifier

Encoders & Decoders

Base64 Encode
Base64 Decode
URL Encode
URL Decode
HTML Encoder
HTML Decoder
Image to Base64
Base64 to Image

Security Tools

JWT Decoder
JWT Parser
Hash Generator
Password Generator

Generators

UUID Generator
Random String Generator
Lorem Ipsum Generator
QR Code Generator
Barcode Generator
Cron Expression Generator

Text Tools

Word Counter
Character Counter
Case Converter
Slug Generator
Text Diff Checker
Regex Tester
Markdown Preview

Converters

Timestamp Converter
Unix Time Converter
CSV to JSON
JSON to CSV

Power BI Tools

DAX Formatter
DAX Minifier
Power Query Formatter

SEO Tools

SEO Analyzer
Meta Tag Generator
robots.txt Generator
Schema Markup Generator
Keyword Density Checker

Color Tools

Color Converter
Color Picker
Color Contrast Checker

All 104 articles

AI & Prompt Engineering

Hybrid Search: Why Vector Retrieval Alone Keeps Missing Your Documents
Scaled Content Abuse: Google Bans Purpose, Not the Tool
Vector Search Is Approximate. Add a Filter and It Gets Worse
Every WebMCP Tutorial Shows the Wrong Object. The Spec Says document
Why LLMs Have Context Windows at All
AI Coding Assistants: Where They Help and How to Review Their Output
LLM Context Windows: What They Are and Why Bigger Is Not Always Better
The Programming Fundamentals That Still Matter
Prompt Engineering for Developers: What Actually Changes Output Quality

Backend & Databases

Binary Quantization Works on Your Embeddings, or It Does Not
The BM25 Versus Embeddings Argument Measures the Wrong Gap
Postgres Logical Replication Does Not Send You the Old Row
Your Token Count Is Not a Property of Your Text
Late Data Is Dropped by Default, and Nothing Tells You
Your Airflow DAG May Not Have a Data Interval Any More
Iceberg Partition Evolution Changes the Future, Not the Past
Exactly-Once Semantics Stop Where Kafka Stops
Lost in the Middle Is an Argument for Retrieving Less
Parquet Row Groups Decide Whether Your Filters Skip Anything
Semantic Chunking Wins on the Datasets Built to Flatter It
Structured Outputs Guarantee a Grammar, Not Your Schema
Truncating Embeddings Works Without Matryoshka, Up to a Point
Sunrise 2027 Does Not Kill the UPC. It Puts a URL in the Barcode
QR Phishing Rose 146% in One Quarter. What to Check Before You Scan
Why DAX Says Circular Dependency When Nothing Is Circular
Decoding a JWT Is Not Verifying It
MongoDB Index Types: Which One Your Query Actually Needs
How to Create an Index in MongoDB (Without Locking Your Collection)
The ESR Rule: Getting Compound Index Field Order Right in MongoDB
The Regex That Works Fine Until One Input Hangs Your Server
Seconds or Milliseconds: The Unix Timestamp Bug Everyone Ships Once
UUIDv4 vs UUIDv7 as a Primary Key: What Actually Changes
Why SHA-256 Is the Wrong Way to Hash a Password
API Authentication: Sessions, JWTs, API Keys and OAuth Compared
REST API Design: Decisions You Cannot Change Later
Node.js Streams: Processing Data You Cannot Fit in Memory
MongoDB Indexes: What to Create and How to Verify It Worked
MongoDB Schema Design: Embed or Reference?
SQL Query Optimization: Read the Plan Before You Guess
SQL Joins Explained: INNER, LEFT, RIGHT and the One That Bites

Data Formats

Base64 Is Not Encryption, and Three Other Things It Is Not
What Changed in JSON Schema Draft 2020-12 (And What Silently Breaks)
XML vs JSON: Where XML Still Wins
Converting CSV to JSON Correctly: Quoting, Types and Encoding
JSON Schema Validation: Validating Shape, Not Just Syntax
JSON vs YAML vs TOML: Choosing a Config Format
Common JSON Errors and How to Fix Them Fast
JSON Formatting Best Practices for APIs and Config Files

Developer Tools

The Caret Range Changes Meaning Below Version 1.0
The Cron Bug That Runs Your Job Far More Often Than You Meant
Developer Productivity: Systems That Survive a Bad Week
Linux Command Line: The Commands Worth Knowing Properly
VS Code: The Features That Actually Save Time
Undoing Almost Anything in Git
GitHub Actions: A CI Pipeline That Stays Fast
Git Rebase vs Merge: Which to Use and When

JavaScript

Temporal Is In ES2026 and You Still Cannot Ship It Without a Polyfill
Math.random Is Predictable. Where That Actually Matters
Why Every Tool Gives You a Different Character Count
encodeURI vs encodeURIComponent: Which One and Why It Matters
Microtask vs Macrotask: The Two Queues That Decide JavaScript Order
The JavaScript Event Loop: Microtasks, Macrotasks and Why Order Matters
JavaScript Closures Explained With Examples You Will Actually Meet
Optional Chaining and Nullish Coalescing: The Right Way to Handle Missing Data
JavaScript Equality: ==, === and Object.is Compared
Async/Await in JavaScript: What It Actually Does
JavaScript Array Methods: A Practical Guide to the 20 You Actually Use

Next.js

Next.js Image Optimization: Getting CLS and LCP Right
Next.js Server Actions: Forms, Validation and Security
Next.js Caching Explained: The Four Layers and How to Control Them
Next.js Metadata API: Complete SEO Setup Without a Library
The Next.js App Router: File Conventions That Do Real Work

React

React Performance: Fix the Things That Actually Matter
The React key Prop: Why Index Keys Break Your Lists
React Server Components Explained Without the Hype
useMemo and useCallback: When They Help and When They Cost You
React Hooks: A Working Guide to the Ones You Need

TypeScript

Migrating a JavaScript Project to TypeScript Without Stopping Work
Type vs Interface in TypeScript: When Each One Is Actually Better
TypeScript Strict Mode: What Each Flag Does and Why to Turn It On
TypeScript Generics: A Practical Guide From First Principles
TypeScript Utility Types: The 12 That Do Real Work

Web Development

Your noindex Stops Working the Moment You Block the Page
JPEG XL Sits at 15%. AVIF Is at 95%. That Is the Whole Decision
CSS Anchor Positioning Is Baseline. You Can Probably Delete Floating UI
CSS contrast-color() Is Baseline. It Only Ever Answers Black or White
Your Hex Colours Are Leaving a Third of the Screen Unused
View Transitions Went Cross-Browser. Here Is What That Costs You
HTML Escaping Is Not XSS Protection. Context Is.
CSS Style Queries: Reacting to a Custom Property, Not a Size
Does Minifying Still Matter With Brotli? 6% for CSS, 36% for JS
INP: What the 200ms Threshold Measures and How to Miss It
llms.txt vs robots.txt: Only One of Them Blocks AI Crawlers
Which Structured Data Still Earns a Rich Result in 2026
Measuring Core Web Vitals in the Field with the web-vitals Library
CSS Container Query Units: cqw, cqi, cqmin and the Rest
container-type: inline-size vs size — Which One You Actually Want
The Contrast Ratio Your Checker Is Probably Reporting Wrong
CSS Container Queries: Components That Adapt to Their Own Space
Web Accessibility: A Checklist You Can Actually Finish
Semantic HTML: The Elements That Do Work For You
Core Web Vitals: What to Measure and What to Actually Fix
CSS Custom Properties: Beyond Storing Colours
Flexbox vs Grid: A Decision Rule That Actually Works

Category hubs and site pages

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