The Toolerax Blog — Page 3
Practical guides and tips to get the most out of our tools — and the concepts behind them.
How Random Number Generators Work
Pseudo-random vs cryptographic randomness, why Math.random is predictable, what modulo bias is, drawing without duplicates, and how RNG bugs cost real money.
Read articleHow to Delete Pages from a PDF
A complete guide to removing pages from a PDF: delete vs split, physical page numbering, why the file may not shrink, redaction warnings, and common mistakes.
Read articleWCAG Color Contrast Explained
What color contrast ratio means, the WCAG AA and AAA thresholds for text and UI, how the ratio is calculated, and practical tips to pass without ruining your design.
Read articleHow to Rotate PDF Pages Permanently
Why rotating a PDF in your viewer does not stick, how to save rotation permanently, which angle to pick, rotating single pages, and fixing sideways scans.
Read articleHow to Convert JPG Images to a PDF
A complete guide to converting JPG and PNG images into a single PDF: page order, orientation, file size, DPI, scanning documents with a phone, and privacy.
Read articleHow to Split a PDF into Separate Pages
A complete guide to splitting PDFs: extract a page range, split every page into its own file, understand page numbering, keep quality, and avoid common mistakes.
Read articleMastering CSS box-shadow
Understand every value in CSS box-shadow — offset, blur, spread, color and inset — and learn the layering trick behind realistic, modern shadows.
Read articleHow to Merge PDF Files for Free
A complete guide to merging PDF files for free: how merging works, keeping quality, page order, bookmarks, form fields, file size, privacy, and common mistakes to avoid.
Read articleWhat Are UTM Parameters?
UTM parameters explained: what utm_source, medium, campaign, term and content do, how analytics reads them, and naming conventions that keep your reports clean.
Read articleBinary, Decimal, Hex & Octal Explained
How number bases work, converting binary to decimal and hex, why hex maps perfectly to binary, why computers use binary at all, and where each base shows up.
Read articleHow to Convert Time Between Time Zones
Converting time zones properly: UTC offsets, why daylight saving breaks fixed maths, the date-rollover trap, half-hour zones, and how to schedule meetings globally.
Read articleHow to Crop an Image the Right Way
A complete guide to cropping images: crop vs resize, the rule of thirds, aspect ratios for every platform, safe zones, and cropping without losing quality.
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