Professional-grade calculators, generators and converters — 100% free, no signup required.
Create professional invoices in seconds
Customizable invoice templates for any business
Generate receipts for your transactions
Find your break-even point instantly
Calculate return on investment for any project
Calculate profit margins and markups
See how your money grows over time
Calculate loan payments and amortization
Calculate asset depreciation schedules
Add or remove VAT from any amount
Calculate Italian income tax (IRPEF)
Calculate and validate tax identification numbers
Calculate your take-home pay after taxes
Calculate payroll for your employees
Calculate total cost of hiring an employee
Calculate sales commissions instantly
Calculate discounts and sale prices
Calculate percentages, increases and decreases
Calculate tips and split bills easily
Plan your retirement savings goal
Plan and track your project budget
Create structured SWOT analyses
Design and download business cards
Compare salaries across locations
Calculate the real cost of meetings
Track work hours and calculate totals
Calculate your Body Mass Index
Age-adjusted BMI calculator for children
Calculate food costs and pricing for restaurants
Calculate costs for your restaurant menu items
Optimize hotel room pricing
Estimate auto repair and service costs
Create professional salon price lists
Schedule and organize appointments
Create onboarding checklists for new clients
Generate patient intake forms
Generate professional bios for LinkedIn & Instagram
Generate a business plan outline with AI
Rewrite text in different tones and styles
Generate catchy slogans for your brand
Summarize long texts into key points
Create structured article outlines
Generate unique business name ideas
Analyze and score your headlines
Check grammar and spelling in your text
Rephrase text while keeping the meaning
Score your text readability (Flesch-Kincaid)
Count characters, words, sentences and paragraphs
Count words and estimate reading time
Analyze word frequency in any text
Generate placeholder text for your designs
Convert text to upper, lower, title case and more
Convert numbers to words in multiple languages
Create professional press releases
Create testimonial templates and layouts
Format, validate and minify JSON
Encode and decode Base64 strings
Test and debug regular expressions
Decode and inspect JWT tokens
Format and beautify SQL queries
Build and validate cron expressions
Compare two texts and see differences
Generate strong, secure passwords
Generate unique UUIDs (v4)
Convert text to URL-friendly slugs
Encode and decode URLs
Encode and decode HTML entities
Minify JavaScript and CSS code
Calculate Unix file permissions
Look up HTTP status codes and meanings
Look up DNS records for any domain
Generate random numbers with custom ranges
Pick and convert colors between formats
Convert between HEX, RGB, HSL and more
Generate harmonious color palettes
Advanced color picker with multiple modes
Check color contrast for WCAG compliance
Create beautiful CSS gradients
Generate CSS box-shadow and text-shadow
Create custom CSS border-radius values
Visual CSS Flexbox layout builder
Calculate and convert aspect ratios
Convert px to rem, em, pt and more
Check your screen resolution and DPI
Compress images without losing quality
Resize images to any dimension
Convert images to Base64 encoded strings
Convert SVG files to PNG images
Create favicons from text or images
Generate placeholder images of any size
Generate QR codes for any URL or text
Create QR codes for restaurant menus
Generate barcodes in multiple formats
Download thumbnails from any YouTube video
Preview Open Graph images for social sharing
Generate trending hashtags for your posts
Create engaging social media posts
Plan your social media content calendar
Generate high-converting email subject lines
Create professional email templates
Generate compelling calls to action
Generate SEO-optimized meta descriptions
Create WhatsApp click-to-chat links
Generate non-disclosure agreements
Generate customizable contract templates
Generate terms and conditions for your website
Generate GDPR-compliant privacy policies
Generate GDPR compliance documents
View, merge and manipulate PDF files
Convert PDF, DOCX, images, CSV — all in browser
Calculate rent prices and affordability
Calculate monthly mortgage payments
Calculate gross and net rental yield
Generate cleaning service price quotes
Convert between units of measurement
Convert currencies with live exchange rates
Convert CSV files to JSON format
Convert JSON data to CSV format
Convert XML to JSON format
Write and preview Markdown in real time
Convert HTML code to Markdown
Convert Markdown to clean HTML
Calculate exact age from date of birth
Calculate age and days until next birthday
Calculate the number of days between two dates
Add or subtract days from any date
Set countdown timers for any event
Precise online stopwatch with laps
Boost productivity with Pomodoro technique
View current time across time zones
Convert times between time zones
Want an AI agent that works 24/7 on WhatsApp? Try SOLO SARA at just €9.90/month
Discover SOLO SARAS.C.A.L.A. offers 131 professional-grade tools that run entirely in your browser — no signup, no data collection, no server uploads. Every calculation, conversion, and generation happens client-side for maximum privacy and speed.
From invoice generators and margin calculators to food cost analysis and hotel rate optimization — our business tools are built for real-world SMB operations across 22 industry verticals including restaurants, salons, hotels, cleaning companies, and real estate agencies.
Generate business plans, professional bios, press releases, and SEO-optimized content with our AI writing suite. Rewrite, summarize, and paraphrase text in multiple tones. All powered by advanced language models.
JSON formatters, regex testers, CSS generators, color pickers, image compressors — everything a developer or designer needs for daily work, without leaving the browser.
Yes, all 131 tools are 100% free with no registration required. They are part of the S.C.A.L.A. AI OS ecosystem — our way of providing immediate value to small businesses worldwide.
Absolutely. All tools run entirely in your browser using client-side JavaScript. No data is ever sent to our servers. Your inputs stay on your device.
Yes. All tools are free for personal and commercial use. Generate invoices, contracts, NDAs, privacy policies, and more — ready for professional use.
Three things: privacy (100% client-side), quality (professional-grade with multi-language support in 6 languages), and breadth (131 tools covering business, AI, development, design, marketing, legal, and real estate).
SARA is your AI agent on WhatsApp: answers customers, takes bookings, follows up — 24/7, automatically. Try it free for 14 days.
Start your free 14-day trial →