tools
Free Invoice PDF Generator — Create Invoices Online
How to create a professional PDF invoice: details, line items, taxes. Free, no signup, everything in your browser.
Xuvero Blog
Tips, tutorials, and updates from our team.
ai
AI Content Detector — Check If Text Was Written by AI
How to check if text was written by ChatGPT, Claude, or other AI. Marker detection and content humanization.
finance
Salary Calculator Ukraine — Gross to Net, PDFO, ESV
How to calculate net salary in Ukraine: PDFO 18%, military levy 5%, ESV 22%. Formulas and examples for 2025-2026.
finance
FOP Tax Calculator Ukraine — Groups 1-4, ESV, Single Tax
How to calculate FOP taxes in Ukraine: single tax, ESV, military levy for groups 1-4. Current 2025-2026 rates with examples.
productivity
Free Pomodoro Timer Online — Boost Your Productivity
How the Pomodoro Technique helps you focus and get more done. Free online timer with customization and statistics.
tools
Free QR Code Generator — Create Codes in Seconds
How to create a free QR code for URLs, Wi-Fi, email, or phone numbers. Step-by-step guide with examples.
tools
Unit Conversion: Complete Online Calculator
Convert meters to feet, kilograms to pounds, Celsius to Fahrenheit, and more units online.
development
JSON, CSV, XML: How to Convert Data Between Formats
Comparison of data formats JSON, CSV, and XML. When to use each format and how to quickly convert between them using online tools.
network
WHOIS: How to Find Information About Any Domain
Learn what WHOIS is, the information it reveals, and how to check any domain online for free.
images
WebP, PNG, JPG: Which Image Format to Choose for Your Site
Comparison of image formats for websites. WebP, PNG, JPG, AVIF — when to use each and how to convert them.
images
How to Optimize Images for Your Website: Step-by-Step Guide
Heavy images are the main cause of slow websites. Learn how to properly compress, convert, and resize images for fast loading.
development
Cron Expressions: Syntax, Examples, and Online Parser
Learn to write cron expressions for task scheduling. Syntax, examples, and an online tool for testing.