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Tips, tutorials, and updates from the Molixa team
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PNG vs JPG: Which Format Should You Use?
PNG or JPG? Photos go JPG, logos and screenshots with sharp edges or transparency go PNG. A plain-English breakdown of compression, quality, transparency, and file size with a clear decision table.
Robots.txt vs Noindex: Which to Use & When
Robots.txt controls crawling; noindex controls indexing, and confusing them is why blocked pages still show up. Here is the difference and the one combination you must never use.
Marginal vs Effective Tax Rate, Explained
Most people think a raise into a new bracket taxes their whole income more. It doesn't. This explainer separates your marginal rate from your effective rate with bracket-by-bracket math and a free calculator.
JavaScript vs Python Regex: Key Differences
The same pattern can match in Python and quietly fail in JavaScript. This guide maps the real differences (missing string anchors, lookbehind support, replacement syntax) so you can write portable regex.
How to Paraphrase Without Plagiarizing (With Examples)
Swapping a few synonyms is still plagiarism. This guide teaches genuine paraphrasing technique, the citation rules people get wrong, and before/after examples.
How to Check If Your Password Was Leaked
If a site you used was breached, your password may already be on a list attackers reuse. Here is how to check it against billions of leaked credentials privately, using k-anonymity so your actual password is never sent, and what to do next.
NFT Metadata JSON Standard: A Practical Guide
Get the name, image, and attributes fields wrong and your NFT shows up blank on OpenSea. Here is the exact metadata JSON standard, field by field, with examples.
Instagram Image Sizes: Resize Without Cropping
Instagram crops anything outside 1.91:1 to 4:5. Here are the exact 2026 dimensions for posts, portrait, stories, and reels, plus how to fit the whole photo without cropping using padding or smart resize.
How to Create a Robots.txt File for Your Site
A clear robots.txt walkthrough: what each directive does, the longest-match-wins rule Google uses, where the file must live, and how to test it before search engines crawl.
How to Calculate Marketing ROI (Formula + Example)
A 400% ROI sounds great until you forget COGS. This guide shows the marketing ROI formula, the gross-profit variation most marketers skip, how ROI differs from ROAS, and a calculator to run your own numbers.
Image to Base64: Data URIs Done Right
A base64 data URI lets you embed an image directly in HTML or CSS with no extra HTTP request. This guide shows the exact data:image syntax, the 33% size penalty to budget for, and when inlining is the wrong call.
QuillBot vs Wordtune vs Molixa: Best Rewriter in 2026
QuillBot and Wordtune dominate paraphrasing, but their free tiers differ sharply. We test modes, word caps, and rewrite quality on identical input, side by side.