Small tools. Big help.
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🚀 Fast Access
Direct access via subdomain
Web Playground
Online HTML/CSS/JS editor, runs directly in your browser, server-less sharing.
VIETNAM PIT Calculator
Comparison between tax law 2025 and earlier vs Resolution 110/2025/UBTVQH15 (effective from Jan 1, 2026)
JSON Toolkit
Format, validate, and convert JSON. Includes Tree View and data processing tools.
Compound Interest Calculator
Calculate the future value of your investment with compound interest. Includes monthly contributions and customizable compounding frequency.
Lunar Calendar
Convert Solar to Lunar calendar, view Can Chi and Good Hours
💡 Smart Picks
Based on your preferences and trends
📂 Categories
Job & Income
Corporate Income Tax (CIT) Calc
Corporate Income Tax Calculator
Freelancer & Business Tax
Calculate tax for withholding (10%) or personal business households.
Overtime Calculator
Calculate accurately your overtime pay based on Vietnam Labor Law
Salary & Tax Master
Full Salary & Tax Suite
Social Insurance
Social Insurance & Pension Calculator
Finance & Banking
Inflation Calculator (Vietnam)
See how much your money has lost or gained value over time.
Investment ROI Calculator
Calculate your Return on Investment (ROI) and Annual Yield.
Loan Calculator
Calculate monthly payments for loans, amortized schedule with reducing balance or flat rate options.
Percentage Calculator
Calculate percentages easily. Find percentage of a number, percentage change, or what percentage one number is of another.
Savings Interest Calculator
Calculate bank savings interest quickly. Supports term deposits with end-of-term or monthly interest payout.
Text Tools
Lorem Ipsum Generator
Generate placeholder text for designs and mockups.
Text Diff Checker
Compare two texts and highlight differences (additions, deletions, changes).
Text Formatter - Clear Style
Remove formatting and clean up text copied from web pages.
Word Counter & Analyzer
Count words, analyze frequency, and convert case (Case Converter).
Generator Tools
Daily Utilities
BMI Calculator
Calculate Body Mass Index (BMI). Evaluate your weight status based on international standards.
Bookmark Creator
Create a personal bookmark set for your browser with your favorite ZTools.
Date & Time Master
All-in-one time tool: Calculate distance, add/subtract dates, and Unix conversion.
Date Toolkit
Calculate distance between dates, add/subtract time, and countdown.
Random Toolkit
Generate random numbers, pick items from list, and roll dice.
Unit Converter
Convert length, weight, volume, area, temperature, and more.
Dev Tools
Cron Expression Parser
Convert Cron expressions into human-readable text.
Developer Toolkit
Comprehensive toolkit for developers
Base64 & Hash Toolkit
Quickly encode/decode Base64 and generate cryptographic hashes like MD5 and SHA256.
JWT Debugger & Decoder
Decode, verify and inspect JSON Web Tokens (JWT) safely in your browser.
QR Code Generator
Generate high-quality QR codes for URLs, text, and more. Works entirely offline for privacy.
Timestamp Converter
Convert between Unix timestamps and human-readable dates.
URL & Base64 Toolkit
Encode/Decode URL, Base64 and parse URL structure quickly.
Not more. Just better.
Every tool in zTools is built with a single goal: reduce complexity, increase clarity. You focus on thinking — we handle the rest.
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