Dolf.in: your free universal online toolbox

Estimate your 401(k) balance at retirement based on salary, contributions, and employer matching.

Estimate your monthly income stream or how long your capital will last during the annuity payout phase.

Compare Traditional IRA, Roth IRA, SEP, and SIMPLE plans to determine the most tax-efficient retirement strategy.

Compare your pension options: is it better to take a lump sum payment or a lifelong monthly annuity?

Plan your retirement with confidence: estimate your savings balance and how long your money will last.

Calculate your Required Minimum Distribution (RMD) for U.S. retirement accounts based on current IRS lifecycle tables.

Estimate your Roth IRA balance at retirement and compare it with a regular taxable investment account.

Simulate your Roth IRA retirement savings with 2024 IRS rules.

Find the ideal age to start your U.S. Social Security benefits (between 62 and 70) for maximum lifetime value.

Advanced simulation with down payment, insurance, and min income.

Calculate the true cost of your loan. APR includes the nominal interest rate plus fees and insurance.

Estimate the maximum amount for your future mortgage.

Calculate the down payment needed for your home purchase and plan your savings timeline.

Calculate your debt-to-income ratio to evaluate your financial health and loan eligibility.

Estimate your FHA loan monthly payments, including the 3.5% minimum down payment and MIP insurance fees.

Estimate your HELOC credit limit and calculate payments during the draw and repayment periods.

Estimate how much you can borrow against your home's value and calculate your monthly equity loan payments.

Estimate the house price you can afford based on your income, debts, and down payment.

Calculate the savings from refinancing your mortgage. Compare your current rate with new offers.

Estimate whether it's more cost-effective to rent or buy your home based on your financial parameters.

Estimate your VA loan monthly payments, including the VA Funding Fee and $0 down payment options.

Calculate your actual net income after agency split, marketing costs, and taxes.

Simplify, differentiate, and plot mathematical functions instantly.

Complete amortization schedule with extra payments and visualization.

Estimate your periodic income or repayments with precision.

Estimate your car leasing monthly payments based on vehicle price, residual value, and money factor.

Calculate your auto loan monthly payments or estimate the maximum purchase price based on your budget.

Find out if it's better to choose a cash back rebate or a promotional interest rate for your auto loan.

Visualize cumulative interest per period and the impact of early repayments.

Plan your journey to debt freedom using the Avalanche method.

Calculate your loan installments with detailed analysis.

Complete simulator for auto, home, and personal loans.

Find the real annual interest rate of your loan based on the borrowed amount and your monthly payments.

Create stunning CSS backgrounds.

Configure the security and performance of your Apache server.

Estimate the future value of your annuity during the accumulation phase with regular deposits.

Calculate your average annual return (geometric) and cumulative ROI across multiple periods or cash flows.

Calculate bond price, yield to maturity (YTM), or coupon rate for fixed-income securities.

Simulate your wealth growth with compound interest. Includes periodic contributions, tax impact, and inflation adjustment.

Calculate the future value (FV) of your investment based on periodic deposits and interest rates.

Plan your investments by calculating either your final capital, the required return rate, or the monthly savings needed.

Calculate the Internal Rate of Return (IRR) for your projects and investments based on cash flows.

Estimate your mutual fund growth. Calculate the impact of expense ratios and systematic investment plans (SIP).

Determine how long it takes to recover your initial investment with simple or discounted payback methods.

Calculate the present value (PV) of a future amount or a series of periodic payments based on interest rates.

Calculate the return on investment (ROI) for your projects, stocks, or real estate simply and accurately.

Prepare your viewing, evaluate the property, and generate your PDF report.

Estimate security deposits for DEWA (water/electricity) and Chiller (cooling) in Dubai based on your property type.

Determine the maximum amount you can spend on rent based on your income and debts.

Universal conversion between m², sq ft, hectares, and acres.

Create scaled vector floor plans.

Instantly create QR Codes, Data Matrix, EAN-13, UPC, and Code 128.

Quickly generate dummy text Lorem Ipsum for your mockups and designs.

Real-time bidirectional conversion between numerical systems and ASCII.

Encode and decode text, URLs, or images to Base64 directly in your browser.

Transform your Curl commands into ready-to-use JavaScript Fetch code with support for headers and request body.

Manipulate, encode, decode and transform your data through a chainable recipe system.

Easily convert ASCII text to hexadecimal and vice versa.

Arithmetic and bitwise operations (AND, OR, XOR...).

Convert your special characters to HTML entities (e.g. & to &) for secure display in your web pages.

Compare two JSON structures in real-time. Additions, deletions and modifications at a glance.

Transform your JSON into a downloadable CSV, compatible with Excel, Google Sheets and LibreOffice.

Transform your JSON data into complete Draft 2020-12 validation schemas.

Convert SVG files into ready-to-use React JSX components. Auto-cleanup, formatting and advanced options for clean, optimized code.

Encode and decode URLs and special character strings according to RFC 3986 standards. Parse and rebuild your URLs component by component.

Instant bidirectional conversion, 100% client-side. Your data never leaves your browser.

Instantly convert your YAML files to JSON and vice versa with validation and automatic formatting.

Generate secure random private keys for the main blockchain wallets.

Real-time BMI calculator with ideal weight and metabolism indicators.

Plan your weight loss with scientific precision.

Generate professional tournament brackets in one click. Manage participants, seeding, and competition structure.

Generate tournament brackets (single, double elimination, pools, Round Robin, Swiss) and automatically schedule matches without collision.

Complete TDEE, Macros, and Weekly Planning calculation.

Complete analysis of your daily energy expenditure.

Estimate the gross profit from your property sale including renovations.

Determine your Certificate of Deposit (CD) earnings. Calculate net interest after taxes based on term and APY.

Estimate your savings growth considering inflation, taxes, and increasing periodic contributions.

Visual creation platform for high-fidelity instant messaging interface simulations.

Real-time Octal / Symbolic permissions converter.

Transform your code snippets into beautiful screenshots ready for sharing on social media.

Create your cron expressions easily with a visual interface. Get a human-readable description and the exact syntax.

Create a professional HTML signature compatible with Outlook, Gmail & Apple Mail.

Quickly generate the most common Git commands for setup, branches, commits, and error handling.

Run JavaScript code instantly in a secure environment with real-time console capture.

Generate realistic JSON arrays for your tests, mockups and API demos.

Comprehensive reference of POSIX / Linux commands, common flags, and I/O stream redirection. Master the terminal.

Generate strong and secure passwords instantly, 100% in your browser.

Generate Universally Unique Identifiers (UUID) versions v1, v4, and v7 instantly.

Generate custom real estate sales scripts. Tailored for sellers, buyers, and investors with built-in objection handling.

Comprehensive chromatic design platform: generate, mix, analyze, and export palettes with WCAG accessibility validation and color blindness simulation.

Calculate VAT on your commercial real estate transactions in Dubai. Offices, retail, and warehouses.

Comprehensive directory of over 150 TCP/UDP ports with their descriptions, associated services, and common vulnerabilities.

Comprehensive cheat sheet of 100+ encryption, hashing, and signature algorithms.

Comprehensive guide to Nmap options, NSE scripts, and network enumeration techniques for penetration testing.

Interactive reference of the OWASP Top 10 (2021). Complete guide to the most critical web vulnerabilities with examples, impacts, and prevention methods.

Interactive guide and payload list for SQL injection testing (MySQL, PostgreSQL, MSSQL, Oracle). Auth bypass, UNION, Blind, and advanced techniques.

Comprehensive reference of XSS attack vectors and filter bypass techniques. Payloads for basic injections, obfuscation, and modern frameworks.

Simulate your future wealth with inflation and taxes.

Convert nominal interest rates to effective annual rates (APY) based on different compounding frequencies.

Quickly calculate simple interest, principal, rate, or time. Formula I = P * r * t.

Use this comprehensive financial calculator to solve Time Value of Money (TVM) problems (PV, FV, PMT, I/Y, N).

Complete text analysis: characters, words, sentences, and reading time.

Compare two texts or files to instantly identify differences, additions, and deletions.

Estimate reading time and text complexity to optimize your content.

The pocket encyclopedia to explore geographic, economic, and cultural data of all nations.

Optimized repayment plan using the Avalanche method.

Reduce the size of your CSS files by removing unnecessary spaces and comments to improve loading performance.

Compress your JavaScript scripts by removing unnecessary characters to speed up your web page loading.

Format, clean, and validate your XML data instantly with customizable indentation.

Real-time interbank rates, hidden fees and multi-currency billing

The ultimate tool for all your date and time calculations.

Accurate tracking of your academic average and CGPA.

Add, subtract, and convert durations and dates.

Timer, stopwatch, and Pomodoro with sound alarm.

The universal temporal utility for developers and professionals.

Evaluate your solvency and remaining living expenses.

Simulate your capital growth and then your retirement income.

Create clean Docker, Compose and Dockerfile snippets with ports, variables, volumes and quick references.

Mix your keywords and instantly check the availability of your future domains.

Simulate the impact of capital injection on your loan.

Easily extract all email addresses from raw text.

Easily repair, clean, and format your malformed JSON data with smart fixes for trailing commas and missing quotes.

Boost focus and mask distractions with our custom sound mixer and built-in Pomodoro timer.

Interactive design interface for creating and exporting translucent glass effect surfaces.

Calculate the impact of a gluten-free flour blend on overall blood sugar compared to a standard recipe.

Curve plotting, roots, and instant extrema.

Calculate, compare, and export your physiological intensity zones for running, cycling, and swimming.

Leave nothing to chance. Methodically evaluate your future home.

Complete interactive reference for HTTP status codes (RFC 7231, 7538, etc.). Explore 1xx to 5xx codes with detailed descriptions and usage tips.

100% Serverless HTTP/REST Tester

100% client-side IBAN validator, generator and analyzer with ISO 13616 and Modulo 97 support.

Compress, convert, crop, and mask your images 100% client-side with lightning speed.

Estimate your US federal income taxes for 2025 and 2026. Calculate your potential refund or amount owed.

Estimate the financial impact of marriage on your federal income taxes. Compare filing jointly vs filing as singles.

Interactive platform dedicated to element study and molecular chemistry.

Instantly generate validation schemas, types, mock data, and forms from JSON/YAML/XML/TOML.

Test, filter, and extract data from your JSON using real-time JSONPath expressions

Decode and inspect your JWT (JSON Web Token) directly in the browser. Header analysis, payload inspection, and expiration check.

Test and debug your Regular Expressions in real-time with capture group highlighting and JS flags support.

Interactive utility to generate ready-to-use Kubernetes commands.

Qualify your real estate prospects accurately. Calculate a priority score based on budget, timeline, and financing.

Clean and format phone numbers to international standards (E.164) for CRM and marketing integration.

Analyze which financing method is more advantageous for your car.

Quickly generate complete and compliant legal notices for your website or application.

Markdown editor with real-time rendering. Write in Markdown and instantly visualize the formatted result.

Test and train your short-term memory. Reproduce the sequence.

Generate and visualize your HTML, Open Graph, and Twitter Cards meta tags.

Convert text to international Morse code and back. Audio playback, statistics and full customization.

Solve any Sudoku grid instantly using our high-performance backtracking algorithm.

Instantly convert text to Braille alphabet. Comprehensive tool for accessibility, learning, and visual Braille transcription.

Complete calculator with amortization, taxes, and extra payments.

Estimate the total cubic volume of your furniture and boxes.

Instant analysis of your connection, hardware, and digital footprint.

Convert text to NATO phonetic alphabet (Alpha, Bravo, Charlie...). Essential for radio, aviation, and military communications.

Expert profitability analysis for Dubai real estate investment.

Simulate the full profitability of your real estate project, from acquisition to tax operation.

Analyze the profitability of your real estate investment. Calculate cash flow, cap rate, and net yield.

Estimate the gross and net ROI of your real estate investment.

Objectively compare the strength of 3 tenant candidates.

Create and customize premium neumorphic soft UI double shadows and export your code in one click.

Estimate your real estate acquisition fees with custom rates.

Detect hidden defects before they become your problems.

Easily create dynamic and visual organization charts from a simple indented text list.

Manipulate your PDF files for free and in complete privacy. 100% in your browser.

Create 2D PDF417 barcodes for boarding passes, identification, and logistics.

All your percentage calculations in one place.

Generate your custom viewing template and export it to PDF.

Quickly generate custom QR codes for your links, text, or contacts. Serverless and 100% private.

Optimize your content for both readers and Google.

Configure web crawler access to your website instantly.

Convert your salary between different pay frequencies and adjust for vacation days and holidays.

Calculate the tenant's final settlement.

Format, clean and beautify your SQL queries. Supports MySQL, PostgreSQL, SQLite, SQL Server and Oracle.

An all-in-one tool to sort, clean, transform, and analyze your text instantly.

Generate the perfect follow-up messages.

Plan international meetings easily by comparing time zones and calculating team comfort scores.

Organize your ideas. Estimate your time. Stay focused.

Luhn-compliant synthetic payment data generator for unit testing and sandbox environments.

Convert px, rem, em and viewport units fluidly in real-time. Generate premium responsive clamp() functions, visual typography scales, and bulk parse CSS blocks.

High-performance tool to create linear, radial, conic, and mesh gradients with OKLCH support, WCAG validation, and multi-platform exports.

Locate your shipments instantly across 500+ global couriers with smart auto-detection, carbon footprint estimation, and B2B white-label portal.

Real-time audio management platform with thematic banks and text-to-speech integration.

Real-time. Zero click. Maximum precision.

Estimate your monthly lease payments for a used vehicle.

Create a QR code for your business card. Scan and save contact details instantly.

Measure and diagnose round-trip time (RTT), jitter, and perceived quality (MOS score) of your WebRTC network sessions in real time.