Engineering & Technical Notes
Notes from building client-side tools.
I built ToolEka because I hate waiting 4 seconds for a server round-trip just to convert a format or calculate a loan payment. These articles break down the underlying math, browser rendering bottlenecks, and engineering compromises behind each utility.
How to Convert PNG to WebP Without Losing Quality
A 3MB uncompressed PNG will crush your LCP score on mobile. Here is how WebP's predictive macroblocks discard perceptual redundancy without turning your sharp UI icons into muddy artifacts.
Image Optimization for SEO: Formats, Speed & Google Rankings Guide
Most image SEO advice is generic fluff copied from 2018. We look at how Googlebot actually renders heavy assets, why DOM paint times bottleneck mobile rankings, and how client-side processing avoids origin latency.
EMI Calculator: How to Calculate Your Monthly Loan Payment
Banks frontload interest so heavily that your initial payments barely touch the principal. I broke down the reducing-balance formula with worked code snippets, rounding caveats, and real prepayment numbers.
Zero telemetry • Client-side only
Every calculator executes directly in your tab.
No remote database tracking your financial numbers or logging payloads. When you close the tab, your memory frees up.