Tool directory
Every tool on Useful Tools Online
Search 117 browser tools for business, finance, images, documents, development, and everyday tasks — or browse by category.
117 tools
Business & Pricing
26- PopularLocal
Break-Even Calculator
Find how many units you need to sell before costs are covered.
Business & Pricing
- PopularLocal
Profit Margin Calculator
Calculate gross and net margin from price, cost, and revenue.
Business & Pricing
- Local
Pricing Calculator
Set a defensible price from costs and target margin.
Business & Pricing
- Local
Customer Acquisition Cost Calculator
Free customer acquisition cost calculator — runs in your browser, no signup required.
Business & Pricing
- Local
ROAS Calculator
Check return on ad spend against revenue and margin targets.
Business & Pricing
- Local
Break-Even ROAS Calculator
Free break-even roas calculator — runs in your browser, no signup required.
Business & Pricing
- Local
Customer LTV Calculator
Free customer ltv calculator — runs in your browser, no signup required.
Business & Pricing
- Local
LTV:CAC Ratio Calculator
Free ltv:cac ratio calculator — runs in your browser, no signup required.
Business & Pricing
- Local
Payback Period Calculator
Free payback period calculator — runs in your browser, no signup required.
Business & Pricing
- Local
Monthly Recurring Revenue Calculator
Free monthly recurring revenue calculator — runs in your browser, no signup required.
Business & Pricing
- Local
Net Revenue Retention Calculator
Free net revenue retention calculator — runs in your browser, no signup required.
Business & Pricing
- Local
Max MRR Calculator
Free max mrr calculator — runs in your browser, no signup required.
Business & Pricing
- Local
Rule of 40 Calculator
Free rule of 40 calculator — runs in your browser, no signup required.
Business & Pricing
- Local
ARPA Calculator
Free arpa calculator — runs in your browser, no signup required.
Business & Pricing
- Local
Subscription Churn Calculator
Free subscription churn calculator — runs in your browser, no signup required.
Business & Pricing
- Local
Marketing ROI Calculator
Free marketing roi calculator — runs in your browser, no signup required.
Business & Pricing
- Local
Average Order Value Calculator
Free average order value calculator — runs in your browser, no signup required.
Business & Pricing
- Local
Ecommerce Conversion Rate Calculator
Free ecommerce conversion rate calculator — runs in your browser, no signup required.
Business & Pricing
- Local
Cart Abandonment Calculator
Free cart abandonment calculator — runs in your browser, no signup required.
Business & Pricing
- Local
Contribution Margin Calculator
Free contribution margin calculator — runs in your browser, no signup required.
Business & Pricing
- Local
Net Profit After Fees Calculator
Free net profit after fees calculator — runs in your browser, no signup required.
Business & Pricing
- Local
Return Rate Calculator
Free return rate calculator — runs in your browser, no signup required.
Business & Pricing
- Local
Reorder Point Calculator
Free reorder point calculator — runs in your browser, no signup required.
Business & Pricing
- Local
Ecommerce Profitability Workbench
Free ecommerce profitability workbench — runs in your browser, no signup required.
Business & Pricing
- Local
Depreciation Calculator
Free depreciation calculator — runs in your browser, no signup required.
Business & Pricing
- Local
Task Breakdown Calculator
Free task breakdown calculator — runs in your browser, no signup required.
Business & Pricing
Crypto
5- Local
Crypto Fee Calculator
Free crypto fee calculator — runs in your browser, no signup required.
Crypto
- Local
Crypto Price Converter
Free crypto price converter — runs in your browser, no signup required.
Crypto
- Local
Gas Calculator
Free gas calculator — runs in your browser, no signup required.
Crypto
- Local
Staking Calculator
Free staking calculator — runs in your browser, no signup required.
Crypto
- Local
Wallet Validator
Free wallet validator — runs in your browser, no signup required.
Crypto
Developer
11- PopularLocal
JSON Formatter
Format, validate, and minify JSON with syntax highlighting.
Developer
- Local
JSON Minifier
Free json minifier — runs in your browser, no signup required.
Developer
- Local
Base64 Encoder Decoder
Free base64 encoder decoder — runs in your browser, no signup required.
Developer
- Local
UUID Generator
Free uuid generator — runs in your browser, no signup required.
Developer
- Local
URL Encoder
Free url encoder — runs in your browser, no signup required.
Developer
- Local
Regex Tester
Test regular expressions against sample text with match highlighting.
Developer
- Local
Markdown Editor
Free markdown editor — runs in your browser, no signup required.
Developer
- Local
Meta Tag Generator
Free meta tag generator — runs in your browser, no signup required.
Developer
- Local
CSS Gradient Builder
Free css gradient builder — runs in your browser, no signup required.
Developer
- Local
ASCII Art Generator
Free ascii art generator — runs in your browser, no signup required.
Developer
- Local
IP Lookup
Free ip lookup — runs in your browser, no signup required.
Developer
Documents for Business
8- PopularLocal
Invoice Generator Pro
Build a professional invoice and export to PDF.
Documents for Business
- Local
Proposal Generator Pro
Free proposal generator pro — runs in your browser, no signup required.
Documents for Business
- Local
Business Plan Builder
Free business plan builder — runs in your browser, no signup required.
Documents for Business
- Local
Letter Template Builder
Free letter template builder — runs in your browser, no signup required.
Documents for Business
- Local
Contract Generator Pro
Free contract generator pro — runs in your browser, no signup required.
Documents for Business
- Local
Timesheet Generator Pro
Free timesheet generator pro — runs in your browser, no signup required.
Documents for Business
- Local
Resume Builder Pro
Free resume builder pro — runs in your browser, no signup required.
Documents for Business
- Local
Certificate Generator Pro
Free certificate generator pro — runs in your browser, no signup required.
Documents for Business
Ecommerce Operations
6- Local
Dropship Pricing Calculator
Free dropship pricing calculator — runs in your browser, no signup required.
Ecommerce Operations
- Local
Shipping Calculator
Free shipping calculator — runs in your browser, no signup required.
Ecommerce Operations
- Local
Inventory Tracker
Free inventory tracker — runs in your browser, no signup required.
Ecommerce Operations
- Local
Amazon FBA Profit Calculator
Estimate per-unit profit after Amazon FBA fees and costs.
Ecommerce Operations
- Local
Marketplace Fee Comparison Calculator
Free marketplace fee comparison calculator — runs in your browser, no signup required.
Ecommerce Operations
- Local
Channel Pricing Calculator
Free channel pricing calculator — runs in your browser, no signup required.
Ecommerce Operations
Finance & Debt
15- PopularLocal
Debt Payoff Calculator
Compare payoff strategies and see interest saved over time.
Finance & Debt
- Local
Loan Calculator
Free loan calculator — runs in your browser, no signup required.
Finance & Debt
- Local
Loan Payoff Calculator
Free loan payoff calculator — runs in your browser, no signup required.
Finance & Debt
- Local
Cash Runway Calculator
Free cash runway calculator — runs in your browser, no signup required.
Finance & Debt
- Local
Burn Rate Calculator
Free burn rate calculator — runs in your browser, no signup required.
Finance & Debt
- Local
Compound Interest Calculator
Free compound interest calculator — runs in your browser, no signup required.
Finance & Debt
- Local
Investment Return Calculator
Free investment return calculator — runs in your browser, no signup required.
Finance & Debt
- Local
Salary Calculator
Free salary calculator — runs in your browser, no signup required.
Finance & Debt
- Local
Tax Calculator
Free tax calculator — runs in your browser, no signup required.
Finance & Debt
- Local
Tip Calculator
Free tip calculator — runs in your browser, no signup required.
Finance & Debt
- Local
Currency Converter
Free currency converter — runs in your browser, no signup required.
Finance & Debt
- PopularLocal
Percentage Calculator
Quick percentage change, markup, discount, VAT/tax add-on, and ratio math.
Finance & Debt
- Local
Cash Flow Forecast Calculator
Free cash flow forecast calculator — runs in your browser, no signup required.
Finance & Debt
- Local
Freelance Rate Calculator
Free freelance rate calculator — runs in your browser, no signup required.
Finance & Debt
- Local
Self-Employment Tax Calculator
Free self-employment tax calculator — runs in your browser, no signup required.
Finance & Debt
Image & Design
14- Local
Color Picker
Free color picker — runs in your browser, no signup required.
Image & Design
- Local
Color Palette Studio
Free color palette studio — runs in your browser, no signup required.
Image & Design
- Local
Gradient Studio
Free gradient studio — runs in your browser, no signup required.
Image & Design
- PopularLocal
Image Resizer Pro
Resize images to exact pixels or percentages in your browser.
Image & Design
- PopularLocal
Image Compressor Advanced
Compress JPG, PNG, and WebP with quality control — locally.
Image & Design
- Local
Image Watermark Pro
Free image watermark pro — runs in your browser, no signup required.
Image & Design
- Local
Image to Base64 Pro
Free image to base64 pro — runs in your browser, no signup required.
Image & Design
- Local
Advanced Image Converter
Free advanced image converter — runs in your browser, no signup required.
Image & Design
- Local
SVG to PNG Pro
Free svg to png pro — runs in your browser, no signup required.
Image & Design
- Local
Favicon Studio
Free favicon studio — runs in your browser, no signup required.
Image & Design
- Local
Favicon from Text Pro
Free favicon from text pro — runs in your browser, no signup required.
Image & Design
- Local
Screenshot Editor
Free screenshot editor — runs in your browser, no signup required.
Image & Design
- Local
Social Thumbnail Studio
Free social thumbnail studio — runs in your browser, no signup required.
Image & Design
- Local
GIF Creator Pro
Free gif creator pro — runs in your browser, no signup required.
Image & Design
Property & Mortgage
12- PopularLocal
Mortgage Calculator
Estimate monthly mortgage payment, interest, and total loan cost.
Property & Mortgage
- Local
Closing Cost Calculator
Free closing cost calculator — runs in your browser, no signup required.
Property & Mortgage
- Local
Rental Analyzer
Free rental analyzer — runs in your browser, no signup required.
Property & Mortgage
- Local
Rental Income Projector
Free rental income projector — runs in your browser, no signup required.
Property & Mortgage
- Local
Property Calculator
Free property calculator — runs in your browser, no signup required.
Property & Mortgage
- Local
Property Comparator
Free property comparator — runs in your browser, no signup required.
Property & Mortgage
- Local
Property Tax Estimator
Free property tax estimator — runs in your browser, no signup required.
Property & Mortgage
- Local
Loan-to-Value Calculator
Free loan-to-value calculator — runs in your browser, no signup required.
Property & Mortgage
- Local
Debt-to-Income Calculator
Free debt-to-income calculator — runs in your browser, no signup required.
Property & Mortgage
- Local
Home Affordability Calculator
Free home affordability calculator — runs in your browser, no signup required.
Property & Mortgage
- Local
Rent vs Buy Calculator
Free rent vs buy calculator — runs in your browser, no signup required.
Property & Mortgage
- Local
Refinance Break-Even Calculator
Free refinance break-even calculator — runs in your browser, no signup required.
Property & Mortgage
Utilities
20- Local
Unit Converter
Convert length, weight, volume, and more between unit systems.
Utilities
- Local
Age Calculator
Free age calculator — runs in your browser, no signup required.
Utilities
- Local
BMI Calculator
Free bmi calculator — runs in your browser, no signup required.
Utilities
- Local
Days Calculator
Free days calculator — runs in your browser, no signup required.
Utilities
- Local
Countdown Timer
Free countdown timer — runs in your browser, no signup required.
Utilities
- Local
Time Zone Converter
Free time zone converter — runs in your browser, no signup required.
Utilities
- Local
Random Number Generator
Free random number generator — runs in your browser, no signup required.
Utilities
- Local
Roman Numeral Converter
Free roman numeral converter — runs in your browser, no signup required.
Utilities
- Local
Fraction Simplifier
Free fraction simplifier — runs in your browser, no signup required.
Utilities
- Local
Password Generator
Free password generator — runs in your browser, no signup required.
Utilities
- PopularLocal
QR Code Generator
Create QR codes for URLs, text, and contact details.
Utilities
- Local
QR Code Studio Pro
Free qr code studio pro — runs in your browser, no signup required.
Utilities
- Local
Barcode Generator Pro
Free barcode generator pro — runs in your browser, no signup required.
Utilities
- Local
Lorem Ipsum Generator
Free lorem ipsum generator — runs in your browser, no signup required.
Utilities
- Local
Text Case Converter
Free text case converter — runs in your browser, no signup required.
Utilities
- Local
Word Counter
Free word counter — runs in your browser, no signup required.
Utilities
- Local
Character Counter
Free character counter — runs in your browser, no signup required.
Utilities
- Local
Emoji Searcher
Free emoji searcher — runs in your browser, no signup required.
Utilities
- Local
Birthday Reminder
Free birthday reminder — runs in your browser, no signup required.
Utilities
- Local
Pomodoro Timer
Free pomodoro timer — runs in your browser, no signup required.
Utilities
Can't find what you need?
Browse guided decision paths for multi-step workflows, or read comparisons and guides for deeper context.