Practical guides for understanding and using our tools
Comparisons, explanations and examples created to help you choose formats, understand results and make better digital decisions.
Useful information beyond the tool
Quick tools can solve a task, but they do not always explain why one option is preferable, what limitations exist or how a result should be interpreted.
This section contains guides related to SWS Universe utilities. Each article includes original explanations, examples, comparisons and practical recommendations.
Published guides
JPG vs PNG vs WebP: Which Image Format Should You Use?
Compare image quality, transparency, compatibility and file size. Learn when to use JPG, PNG or WebP.
How Long Should a Password Be? Length, Entropy and Security
Learn how password length, entropy, randomness, reuse, password managers and MFA affect account security.
How to Calculate Percentages: Discounts, Increases and Changes
Learn how to calculate percentages, discounts, increases, percentage changes, differences and original values with practical examples.
How Reading Time Is Calculated
Learn how reading time is estimated from word count, reading speed, text complexity, aloud reading, scripts and presentations.
How to Create Useful QR Codes
Learn what to check before publishing, printing or sharing a QR code: content, testing, size and scan context.
Image to PDF for Scanned Documents
Prepare scans, receipts, screenshots and photos before combining them into one readable PDF document.
Text Cleanup Before Publishing
A checklist for word counts, character limits, spacing, line breaks and final text review.
Local Browser Tools and Privacy
Understand what browser-side processing means, what it helps with and what it does not guarantee.
What you will find
The guides focus on real situations connected to the tools available on the site.