Articles - Page 2
Technical articles and updates.
Introduction How to Read a QR Code from an Image and Check the URL Before Opening It
Decode QR codes from images or screenshots, verify campaign links before printing, and inspect suspicious QR URLs safely.
Introduction How to Convert Milliseconds, Seconds, Minutes, and Hours for Timeouts and TTLs
Convert time units for API timeouts, cache TTLs, retry delays, polling intervals, and monitoring settings without mixing up milliseconds and seconds.
Introduction How to Count Characters and Clean Text for Docs, Forms, and Code Snippets
Use character counts, line counts, whitespace cleanup, and HTML escaping to prepare text for documentation, metadata, forms, and development workflows.
Introduction How to URL Encode and Decode Strings for APIs and Query Parameters
Learn what percent encoding means, when to encode URLs, and how to inspect encoded query strings safely during API and tracking-link debugging.
Introduction How to Convert URL Parameters to JSON for UTM and API Debugging
Turn long query strings into readable JSON so you can review UTM tags, API filters, duplicated keys, and encoded values more easily—with concrete examples.
Introduction How to Build SELECT and JOIN Queries Visually with a SQL Builder
Assemble SELECT, WHERE and JOIN clauses in your browser with a visual SQL builder. Useful for learning SQL, extracting data, and drafting queries before review.
Introduction CSV and JSON Conversion: Choosing the Right Format for APIs and Data Migration
Learn how to convert between CSV and JSON safely, including headers, delimiters, value types, nested data, and practical workflow tips.
Introduction JSON Formatting and Validation: How to Read API Responses Safely
Learn how to format JSON, catch syntax errors, inspect value types, and turn API responses into types, schemas, or documentation.
Introduction Create Infrastructure Diagrams in Your Browser: Auto-Generate Diagrams from Code
Use our Mermaid.js-based infrastructure diagram builder to visualize cloud and network configurations just by defining nodes and connections.
Introduction Generate ER Diagrams from SQL DDL: How CREATE TABLE Parsing Works
How the SQL to ER diagram tool parses CREATE TABLE DDL into a Mermaid ER diagram — the PRIMARY KEY/FOREIGN KEY extraction rules, how column types are handled, and which DDL patterns aren't supported.
Introduction The JSON Ecosystem: Connecting Formatting, Types, Validation, and API Specs
Follow one API response through formatting, TypeScript types, Zod runtime validation, and OpenAPI definitions—with real code at every step—for a clear view of type-safe API development.
Introduction JWT Security Deep Dive: Attack Vectors, JWKS, and Production Best Practices
A thorough guide to JWT security — covering the alg:none attack, algorithm confusion, key management with JWKS, token revocation strategies, and a production-ready security checklist.