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100% secure, free-to-use cloud tools for SMEs, freelancers, and tradesmen to stop using complex Excel spreadsheets.

Explore Free Tools

Tools to Accelerate Your Business

No installation required. Your data never leaves your computer.

Invoice Maker

Create, print, and save professional invoices easily.

Shift Planner

Organize your staff's working days and export weekly shift PDFs.

Payroll Calculator

Calculate staff salaries, advances, and payrolls seamlessly.

Quotation Maker

Prepare and export custom price quotes for your customers.

Expense Tracker

Record and track your daily income and expenses.

Profit Margin Calculator

Calculate ideal selling price, gross profit, margin %, and markup %.

Gas Fee Calculator

Estimate Ethereum gas fees in gwei, ETH, and optional USD.

Compound Interest Calculator

Estimate compound growth with regular contributions and a yearly table.

Resume Maker

Create fast and professional PDF resumes.

NDA & Agreement Generator

Create binding Non-Disclosure (NDA) and Freelance Contract PDFs.

ZenInventory

Warehouse, stock tracking, and inventory management system.

QR Code Generator

Create free, custom, non-expiring QR codes with colors.

QR Code Reader

Scan and decode QR codes from images or screenshots instantly.

Bulk Image Resizer

Resize and compress multiple product images for free.

VAT / Tax Calculator

Instantly calculate net, gross, and tax amounts.

Free PDF Merger

Combine multiple PDF files instantly. 100% free and private.

YouTube Thumbnail Downloader

Download YouTube cover photos in HD instantly.

Image Format Converter

Convert WebP, JPG, and PNG images instantly.

Strong Password Generator

Generate secure and random passwords in one click.

PDF Splitter

Extract specific pages from a PDF document.

Word & Character Counter

Instantly count words, characters, and estimate reading time.

UTM Link Builder

Create Google Analytics tracking links for your campaigns easily.

Case Converter

Convert text between UPPERCASE, lowercase, and Title Case instantly.

Thumbnail Safe Zone Preview

Test if your YouTube thumbnails are hidden by UI elements.

Sponsorship Pricing Calculator

Calculate exactly how much to charge brands for your videos.

ROI Calculator

Calculate Return on Investment (%), net profit, and annualized returns.

Markdown to HTML Editor

Write Markdown live and export clean HTML code with one click.

Break-Even Point Calculator

Find out how many units you need to sell before you profit.

Discount & Markdown Calculator

Calculate sale prices, amount saved, and discount percentages.

Purchase Order Generator

Create professional purchase orders for vendors and export as PDF.

Timesheet & Hourly Wage Calculator

Calculate weekly pay from hours worked, including overtime.

Currency Converter

Convert between currencies using an exchange rate you enter yourself.

Proposal / Estimate Generator

Create client proposals with scope of work, pricing, and export as PDF.

Meeting Minutes Generator

Record attendees, agenda notes, and action items, then export as PDF.

Employee Onboarding Checklist

Track new hire onboarding from before day one through the first month.

Reference guides

Reference pages built from the tools: conversion tables, document checklists and a published sponsorship rate card.

Pricing mathMarkup ↔ margin conversions from 5% to 200%, percent-off tables, worked examples. Business documentsQuote, PO, proforma, delivery note, invoice, credit note, receipt: what each is for and which comes first. Creator moneyYouTube sponsorship rates by niche and channel size, from a stated model. Countries 2026Payroll, employer cost, tax and LLC registration facts with dated sources. All tools A–ZEvery tool and reference page on one page.

About Zen2B2

Zen2B2 is built and run by Şenol Şahan of SubverseLab. Every tool runs in your browser and nothing you type is uploaded; the reference pages are generated from stated formulas and checked before they go live. Read who makes the site and how the content is produced.

Contact

Report a broken tool, question a number on a reference page, or suggest a guide.