Guides

Practical walkthroughs tied to working tools.

How to compress images for web and email

Shrink JPG, PNG, and WebP files before sharing or publishing—cut file size without a desktop app.

Combine invoices, scans, or contracts into one PDF without a desktop app.

Beautify messy API payloads, catch syntax errors, and minify JSON before you ship.

Add or remove GST at 5%, 12%, 18%, or 28% for quotes and invoices—understand inclusive vs exclusive amounts.

Hit essay, SEO, and social limits with a free word counter.

Generate long, random passwords and understand what makes a password hard to guess.

Create a downloadable QR code for links, Wi-Fi hints, or plain text.

Understand equated monthly installments, interest, and tenure—then estimate EMI with a free calculator.

Learn percentage of, increase/decrease, and reverse percentage—then compute them free online.

Convert shouty text, headlines, and variable names between cases without retyping.

Turn JPG or PNG scans into a single PDF locally—useful for forms, receipts, and homework uploads.

Learn what Base64 is, why it is not encryption, and how to encode or decode strings locally online.

Reduce PDF file size for email and uploads while keeping pages readable.

Turn PDF pages into JPG images for slides, previews, and social posts.

Crop photos to exact pixel regions for avatars, banners, and product shots.

Estimate monthly mortgage payments from principal, rate, and term.

Clean up YAML indentation and spot structural issues before you deploy configs.