All 196 guides across 17 topic silos, each one written around a single job: the pillar covers the broad workflow, and every tutorial solves one specific task. Find your silo below, or start at the blog home.
The complete free invoice generator guide — what to include, GST rules, templates, numbering, payment terms and how to create a PDF invoice in minutes with no signup.
The complete free QR code generator guide — WiFi, UPI, menus, vCards, print sizing, static vs dynamic and scan fixes. No signup, no expiry.
The complete free resume builder guide — sections, fresher vs experienced, ATS rules, India/US/UK formats, cover letters, offer letters + PDF export.
The complete mortgage calculator guide — PITI, formula with $240k example, amortization, 15-vs-30, refinance, India EMI + rent-vs-buy. Free calculator.
Generate strong passwords free and offline: settings, entropy table, passphrases, manager + 2FA pairing, breach basics. No signup, nothing uploads.
Count words free with no signup: reading-time math, Flesch formulas, density without myths, length-by-intent + India limits. Local and private.
The complete image optimization guide — 80% quality rule, JPG vs PNG vs WebP, exact resize presets, 100KB portal method, EXIF privacy + image SEO.
The complete PDF workflow guide — merge in order, range extraction, 1MB compression, scans to PDF, JPG export, text vs OCR, rotate + watermark.
The complete local debugging guide — JSON errors, Base64 modes, SHA-256 vs MD5, UUID seeding, regex flags, JWT expiry + URL encoding. No uploads.
The complete on-page SEO workflow — 11 weighted checks, density truth, pixel titles, crawl plumbing, social cards + honest AI checks. Free analyzer.
The complete India wealth guide — SIP vs FD vs PPF numbers, compounding frequency, tax regimes, real returns, goal math + LTCG. Free calculators.
The complete percentage guide - percent of a number, increase and decrease, discounts, markup vs margin, reverse percentages, error, and percentage points.
The complete BMI guide - formula and charts, women vs men, healthy weight range, calorie deficits, water intake, athletes, and BMI for children.
The complete age and date guide - exact age in years, months and days, date differences, time zones, Unix timestamps, leap years and date math.
Create a signature online: draw with mouse, touch or pen, type in cursive fonts, then export a transparent PNG for PDFs, forms and email.
Compare snowball and avalanche debt payoff, see how minimums roll forward, and use two worked examples to plan your debt-free date.
Learn how weighted grades work, calculate your current average, and find the final exam score needed for your target, with checked examples.
Stay current: new guides land in the RSS feed first. Every tutorial links back to its pillar and to the free tool it demonstrates.