Exhaustive, developer-grade reference sheets featuring instant copyable tables, mathematical formulas, syntax tokens, and structured benchmarks across 10 core categories.
Income tax slabs, GST HSN rates, Section 80C/80D deduction limits & financial math formulas
HTTP status codes, regular expression tokens, cron schedules, chmod permissions, and Git CLI cheat sheet
ASCII codes, invisible Unicode characters, case conventions, Markdown syntax, and readability scores
Standard dimensions for YouTube, Instagram, X, LinkedIn, print PPI formulas & WebP/AVIF matrix
SI metric prefix powers, engineering multipliers, culinary volume-to-weight & AWG wire gauge table
JSON-LD schema types, Google SERP pixel limits, robots.txt directives, and 2026 Core Web Vitals thresholds
Hash algorithms, symmetric/asymmetric ciphers, encoding overhead (Base64/58) & Web Crypto API
Global timezone UTC offsets, ISO-8601 formatting patterns, Unix epoch milestones, and cron schedules
Flexbox and Grid properties, OKLCH/HSL color spaces, responsive breakpoints, and specificity weights
Amazon & Flipkart fees, payment gateways, SaaS metrics (LTV, CAC, ROAS), and GST ITC rules