Tools Directory
Free Vortenza tools and calculators
Find practical calculators, converters, and developer utilities built for fast answers with a clean workspace.
- Tools
- 51
- Topics
- 7
- Cost
- $0
Editorial trust and sources
Vortenza tools use verified formulas and standard specifications. We check tax calculators against the 2026 IRS tax code. We match mortgage and compound interest formulas with standard financial banking equations. Developer formatters align with RFC 8259 JSON standards and standard regex patterns.
Core industry concepts
- Client-side execution
- Running calculator logic directly in your browser so no personal data gets sent to external servers.
- Amortization modeling
- Calculating periodic loan payments to split principal and interest portions over time.
- Email record validation
- Testing domain configuration files against SPF, DKIM, and DMARC deliverability specifications.
Browse tools by category
Jump into the right set of tools for the task in front of you.
Free AI Tools 2026
Free AI Tools 2026
Token usage
Tax Calculators 2026
Plan tax payments
Income estimates
Finance Calculators 2026
Model money choices
Payments and growth
Developer Tools 2026
Format and validate
Dev utilities
Unit Converters 2026
Convert units fast
Everyday measures
AI Content Tools 2026
Humanize AI text
Free detection tools
Email Tools 2026
Email deliverability
Outreach tools
About Vortenza tools
All Vortenza tools are free, browser-based calculators and utilities that run entirely client-side. No signup, no account, and no data collection. AI cost tools cover token counting, API cost estimation for OpenAI GPT-4o, Anthropic Claude, and Google Gemini, and prompt cost estimation before production deployment. Finance tools include mortgage payment calculation with amortization schedules, compound interest with contribution modeling, and a freelance rate calculator that accounts for self-employment tax and unpaid hours.
Tax tools include a federal income tax estimator using current 2026 brackets for all four filing statuses. Developer tools include a JSON formatter and validator with live syntax highlighting and a regex tester with named capture group support. SEO tools include an AI text humanizer that passes GPTZero and Turnitin, an AI detection checker, a plagiarism checker, and an AI article writer that produces human-style content. Unit converters cover length, weight, temperature, volume, area, and speed across metric and imperial systems.
| Tool category | Primary function | Data handling policy | Typical use case |
|---|---|---|---|
| AI Cost | Calculate prompt fees and token counts | Client-side, local processing | Estimate developer API budgets |
| Tax and Finance | Estimate income taxes and loan payments | Client-side, local processing | Plan personal and business finances |
| Developer | Format JSON and test regex patterns | Client-side, local processing | Validate code blocks and structures |
| SEO and Writing | Check plagiarism and detect AI texts | Secure API processing, no data saved | Verify draft quality before publishing |
| Email Utilities | Validate DNS records and check spam | Secure API query check | Improve outreach email inbox placement |
How to use Vortenza tools
Vortenza tools provide instant calculations and formatting directly in your web browser. You do not need to sign up, create an account, or pay a fee to use any calculator in our directory.
Select your utility
Choose a category like AI, tax, or developer tools from the directory list.
Enter your parameters
Input your numbers or paste your code into the secure, client-side interface.
Export your results
Copy the calculated values, formatted code, or generated files to your clipboard.
Frequently asked questions
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All online tools
Search, compare, and open any available Vortenza tool.
AI Token Counter
Count words, characters, and estimated tokens by AI model.
OpenAI Cost Calculator
Estimate monthly spend by model, tokens, and usage tier.
Claude API Cost Calculator
Estimate Anthropic Claude API costs by model and monthly call volume.
AI Prompt Cost Estimator
Paste your prompt to count tokens and estimate cost across GPT-4o, Claude, and more.
LLM Cost Calculator
Estimate and compare AI API costs across GPT, Claude, Gemini, DeepSeek, and Mistral.
AI Prompt Examples Library
Browse 100+ free AI prompt examples for ChatGPT, Claude, and Gemini. Searchable by category.
Vortenza Humanizer
Transform AI-generated content into natural, human-sounding text that passes GPTZero, Turnitin, and Originality.ai detection. Free, no signup.
Vortenza Writer
Generate original articles written in human style from scratch. No AI patterns, no detection issues.
AI Detection Checker
Check if your text will be flagged as AI-written by GPTZero, Turnitin, or Originality.ai. Get a score instantly.
Plagiarism Checker
Check your content for plagiarism with n-gram analysis and uniqueness scoring. Free, no word limit.
Cold Email Subject Line Tester
Score your cold email subject lines for spam words, length, and open rate potential.
SPF DKIM DMARC Checker
Check your domain SPF, DKIM, and DMARC DNS records with color-coded results and plain-English explanations.
DMARC Record Generator
Generate a valid DMARC TXT record for your domain with plain-English explanations for every setting.
Email Spam Score Checker
Check your email subject and body for spam trigger words, formatting issues, and deliverability risks.
Email Duplicate Checker
Find and remove duplicate emails from your lead lists. Upload a blocklist and leads CSV to get a clean unique list ready for cold email campaigns.
Federal Income Tax Estimator
Project federal tax owed with brackets and deductions.
Freelance Rate Calculator
Calculate your hourly rate, day rate, and project pricing with real freelancer business math. Supports 10 countries.
Mortgage Payment Calculator
Monthly payment, interest, and amortization breakdown.
Compound Interest Calculator
See how savings grow with contributions and APY.
Salary to Hourly Calculator
Convert annual salary to hourly rate and vice versa. See gross and after-tax pay by hour, day, week, and month.
Net Worth Calculator with Age Comparison
Calculate your net worth and compare to US median for your age group. Track assets vs liabilities and set a growth goal.
Debt Snowball vs Avalanche Calculator
Compare the debt snowball and avalanche payoff methods side by side. See which saves more interest and pays off faster.
Free Invoice Generator
Create professional freelance invoices instantly. Add line items, tax, and notes. Download print-ready. No signup.
JSON Formatter & Validator
Beautify, minify, and validate JSON with live syntax highlighting. Runs entirely in your browser.
Regex Tester
Test and debug regular expressions with live match highlighting, flag toggles, capture groups, and example patterns.
Base64 Encoder and Decoder
Encode or decode Base64 strings instantly. Supports text, files, and URL-safe mode. All processing in your browser.
CSS Gradient Generator
Generate linear, radial, and conic CSS gradients with live previews, color stops, angle controls, and preset swatches.
Cron Job Schedule Builder
Build cron expressions visually with plain-English explanations. See next 5 run times and copy instantly.
JWT Decoder and Inspector
Decode JWT tokens instantly. View header, payload, and claims. Check expiry status and get security analysis. Browser-only.
Unix Timestamp Converter
Convert Unix timestamps to human-readable dates instantly. Supports seconds, milliseconds, UTC, ISO dates, and timezone conversion. Free, browser-only.
Unit Converter
Length, weight, temperature, and more.
URL Encoder and Decoder
Encode or decode URLs and query strings instantly. Parse URL components and build query strings. Free, browser-only.
SQL Formatter and Validator
Format, beautify, and minify SQL queries online. Syntax highlighting, dialect support (MySQL, PostgreSQL, SQLite, SQL Server), and validation. Free, browser-only.
Freelance Contract Generator
Generate a professional freelance contract covering scope, payment, IP ownership, and termination. Download ready. Free, no signup.
Markdown to HTML Converter
Convert Markdown to HTML with a live preview. Supports tables, code blocks, task lists, and all GitHub Flavored Markdown. Free, no signup.
Emergency Fund Calculator
Calculate how much emergency fund you need based on your expenses, income type, and risk factors. See your timeline to goal.
Inflation Calculator
Calculate inflation-adjusted value using historical US CPI data from 1913 to 2026. See purchasing power changes and average annual rates.
AI Writing Cost per Article Calculator
Estimate API cost to write one article with GPT-4o, Claude, Gemini, or DeepSeek. Compare all 12 major models side by side.
DeepSeek API Cost Calculator
Calculate DeepSeek V3 and R1 API costs with prompt caching. Compare vs GPT-4o, Claude Haiku, and Gemini Flash.
HTTP Status Codes Reference
Complete reference for all 63 HTTP status codes with descriptions, causes, and developer tips. Filter by category or search by code number.
JSON to CSV Converter
Convert JSON arrays to CSV instantly in your browser. Supports nested objects with dot notation, custom delimiters, and instant download. No signup required.
Word Count and Readability Analyzer
Free readability checker with Flesch Reading Ease, Flesch-Kincaid Grade Level, ARI score, reading time, and top word frequency analysis.
Password Strength Checker
Free password strength checker with crack time estimate, entropy calculator, and strong password generator.
Color Contrast Checker WCAG
Check color contrast ratios for WCAG AA and AAA compliance. Get instant pass/fail for normal text, large text, and UI components.
Regex Explainer
Paste any regex pattern and get a plain English explanation token by token. Test matches and see captured groups.
AI System Prompt Leakage Tester
Test your AI system prompt for security vulnerabilities. Runs 8 adversarial attacks and shows what information users could extract.
Cold Email Infrastructure Planner
Plan cold email infrastructure: domains, inboxes, warmup schedule, and monthly costs. Free calculator for agencies and B2B teams.
Upwork Proposal Win-Rate Calculator
Calculate your Upwork break-even win rate, profit per project, and monthly net income using the 2025 variable fee model.
SPF Record Generator
Generate a valid SPF record for Google Workspace, Microsoft 365, SendGrid, and more. Includes DNS lookup counter and copy-ready output.
Email Header Analyzer
Analyze email headers to check SPF, DKIM, DMARC authentication, trace delivery hops, detect spam signals, and get a deliverability score.
Email Deliverability Checker
Check your domain SPF, DKIM, and DMARC DNS records instantly. Get a 0-100 deliverability score with actionable fixes for every issue. Free, no signup.