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Deep technical articles on APIs, security, debugging, and developer tooling.
✦ AI-powered — understands natural language
GraphQL's Introspection Query Is an Attacker's Best Friend — Batching, Nested Query DoS, and Persisted Queries
Colour Converter — Hex, RGB, HSL & CMYK with Live Preview
Learn how hex, RGB, HSL, and CMYK colour representations relate to each other, when to use each, how HSL enables systematic colour theming, and how to convert any colour with a free colour converter.
Cron Explainer — Translate Any Cron Expression to Plain English
Learn how cron expression syntax works, what each field means, common schedules explained in plain English, cron pitfalls like timezone issues and overlapping jobs, and how to use a free cron explainer tool.
Why "P@ssw0rd1" Still Gets Cracked: What Password Strength Actually Means
Most passwords that "pass" complexity rules are still cracked in minutes. Here's how attackers actually work, what password entropy means, and why random generation beats human-chosen passwords every time.
Negative Numbers, Overflow, and What Hex Reveals About Your Data
Most developers can convert hex to decimal — but two's complement, signed overflow, and bit-width boundaries are where base conversion becomes genuinely useful for debugging real problems.
Hash Generator — MD5, SHA-256, SHA-512 & SHA-3 for Data Integrity
Learn how cryptographic hash functions work, when to use MD5 vs SHA-256 vs SHA-3, the avalanche effect, why hashes can't be used for passwords, and how to use a free hash generator for integrity verification.
JWT Decoder — Debug Authentication Errors by Inspecting Token Claims
Learn how to use a JWT decoder to debug 401 errors, understand the header, payload, and signature sections, check expiry and audience claims, and identify security issues like alg:none attacks.
HTML Entities — Encode & Decode Special Characters for Correct, Safe HTML
Learn what HTML entities are, why they exist, the most common named entities, how numeric entities work for any Unicode character, and when modern UTF-8 pages don't need them — with a free HTML entities tool.
Number Base Converter — Binary, Octal, Decimal & Hex Explained
Learn how binary, octal, decimal, and hexadecimal number systems work, when each is used in programming, and how to convert between them instantly with a free number base converter.
JWT Decoder — Inspect Any JSON Web Token Instantly
Learn what's inside a JSON Web Token, how to read the header, payload, and expiration claims, and how to use a free JWT decoder to debug authentication issues instantly.
Base64 Encoder/Decoder — How It Works & Real Developer Uses
Learn what Base64 encoding is, how it works, why it's used in JWTs, HTTP headers, data URIs, and email attachments — and how to encode or decode any string instantly with a free tool.
UUID Generator — Generate Unique Identifiers for Any Application
Learn what UUIDs are, the differences between versions 1, 4, and 7, when to use UUIDs over auto-increment integers, and how to generate them instantly with a free UUID generator.
Regex Tester — Write & Debug Regular Expressions with Live Highlighting
Learn how to write and debug regular expressions using a live tester — with syntax reference, real examples for email validation, log parsing, and URL extraction, and tips on greedy vs. lazy matching.
