Open a tool, enter the information you need and get a useful result without unnecessary steps.
Free Online Tools for Calculators, Converters & More
Calculate numbers, convert units and files, generate useful content, prepare images, work with developer data and create visual content from one simple collection of tools.
Find calculators, converters, generators, image utilities, developer tools and creative tools in one place.
Browse by category or jump directly to a specific calculator, converter, generator or utility.
Browse by task
Explore Tools by Category
Choose a category to find related tools without scrolling through the entire directory.
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Converters 9 tools
Convert units, currencies, time, text and files.
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Calculators 13 tools
Calculate money, health, school and everyday math.
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Generators 7 tools
Create QR codes, passwords, favicons and useful digital assets.
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Image tools 6 tools
Convert, compress and prepare images online.
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Developer tools 5 tools
Format data, test APIs and handle common developer tasks.
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Video tools 5 tools
Create comparison videos and YouTube graphics.
View video tools -
Infographics 8 tools
Turn data into charts, rankings and visual comparisons.
View infographics
Online Converters for Units, Money, Time and Files
Convert measurements, currencies, time zones, timestamps, grades, text and video files from one format into another.
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Unit Converter
Convert length, weight, temperature, area, speed, volume and more between metric and imperial units.
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Currency Converter
Convert between world currencies for travel, invoices and online shopping.
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Time Zone Converter
Compare times across regions to schedule calls, meetings and travel.
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CM to Inch Converter
Convert centimeters to inches and inches to centimeters for sizing and measurements.
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GPA to Percentage
Turn a GPA into an approximate percentage for applications and academic comparisons.
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Unix Timestamp Converter
Translate Unix timestamps into readable dates and convert dates back to timestamps.
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WEBM to MP4 Converter
Convert WEBM videos to MP4 for editors, phones and platforms that support MP4.
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Text to Emoji Text
Restyle plain text with emoji lettering for social posts and messages.
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Emoji to Art
Turn emoji into simple text art for posts, chats and creative projects.
Free Calculators for Money, Health, School and Everyday Math
Use practical calculators for loans, mortgages, percentages, health estimates, grades, retirement planning and everyday math.
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Loan Calculator
Estimate monthly payments and total interest for a personal loan.
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Auto Loan Calculator
Estimate car financing using price, down payment, interest rate and loan term.
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Mortgage Calculator
Estimate a home loan payment before comparing financing options with a lender.
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401(k) Calculator
Explore how retirement contributions may grow over time.
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Percentage Calculator
Calculate percentages, discounts, increases and percentage changes.
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Markup Calculator
Calculate selling prices and margins from your product or service cost.
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Tip Calculator
Calculate a tip and split a restaurant or service bill.
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BMI Calculator
Calculate body mass index from height and weight.
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Calorie Calculator
Estimate daily calorie needs using your details and activity level.
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Age Calculator
Calculate an exact age in years, months and days.
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GPA Calculator
Calculate a grade point average from courses, grades and credits.
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Retirement Age Calculator
Estimate when you may reach retirement age based on the information you provide.
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Life Expectancy Calculator
Get a rough life expectancy estimate for general planning and discussion.
Generators for QR Codes, Passwords, Favicons and Documents
Create QR codes, passwords, favicons, flags, placeholder text, invoices and other useful digital assets.
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QR Code Generator
Create QR codes for links, text and other supported content, then download the image.
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Strong Password Generator
Generate random passwords using the length and character types you choose.
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Favicon Generator
Create favicon files for your website from an image.
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Flag Generator
Preview and download country flag images for websites and projects.
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Lorem Ipsum Generator
Create placeholder text for layouts, prototypes and mockups.
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Free Invoice Generator
Create a simple invoice for clients, freelancers and small jobs.
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Random Name Picker
Choose a random name for giveaways, classrooms, games and team activities.
Image Tools to Convert, Compress and Share Pictures
Prepare images for websites, documents, social posts and design work by changing their format, size or packaging.
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PNG to JPG
Convert PNG images to JPG files for broader compatibility and easier sharing.
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PNG to SVG
Convert a PNG into an SVG-style vector result where supported by the tool.
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Image Compressor
Reduce image file size for faster pages and easier sharing.
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Image to PDF
Combine images into a PDF document.
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Color Picker
Pick colors from an image and copy their color codes.
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Free Image Hosting
Upload an image and get a shareable link.
Developer Tools for JSON, Base64, APIs and App Icons
Use small browser-based utilities to format data, inspect API responses, convert values and prepare assets while building websites and apps.
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JSON Formatter
Format and read JSON so structure and errors are easier to spot.
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Base64 Encoder / Decoder
Encode text to Base64 or decode Base64 values back into readable text.
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Online API Tester
Send requests to an API and inspect the response.
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App Icon Generator
Create app icon sizes from a single source image.
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Word Counter
Count words and characters for essays, posts, documents and metadata.
Video Tools for Comparisons and YouTube Images
Create comparison videos, image reveals and other visual content directly from your browser.
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3D Comparison Video
Build animated 3D comparison videos from your data and settings.
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Comparison Video Maker
Create side-by-side comparison videos.
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Sliding Image Comparison Video
Reveal before-and-after images using a sliding comparison effect.
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Military Comparison Video
Create comparison videos for military-related data and topics.
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YouTube Thumbnail Downloader
Get a thumbnail image from a supported YouTube video URL.
Infographic and Data Visualization Generators
Turn CSV data, rankings and comparisons into charts and shareable visual graphics.
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CSV to Chart
Paste CSV data and turn it into a chart.
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CSV to Bar Image
Turn tabular data into a bar-style image.
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Ranking Infographic Generator
Create ranked lists as clean visual graphics.
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Top 10 Comparison Infographics
Compare ten items in a single visual layout.
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Country Comparison
Compare countries side by side using visual data.
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Mobile Phone Comparison
Compare mobile phone specifications visually.
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Fighter Jet Comparison
Create visual comparisons of aircraft.
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Social Media Post Creator
Create a post-ready visual for social media.
Useful combinations
Tools That Work Well Together
Some tasks are easier when you combine two or more tools. These examples show practical workflows.
Plan a big purchase
Start with a loan calculation, compare financing options, and use percentage calculations to understand down payments, rates or changes.
Prepare images for a website
Convert an image to a suitable format, reduce its size, then prepare a favicon or app icon when needed.
Turn data into visuals
Start with structured CSV data, create a chart, then turn rankings or comparisons into graphics or video.
Track health and study goals
Use health calculators for general estimates and combine GPA tools when you need both grade-point and percentage-based calculations.
Work across borders
Check currency values, compare meeting times across regions and prepare invoices for international clients or remote teams.
Debug and build
Format structured data, encode or decode Base64 values, test API endpoints and convert Unix timestamps while debugging software.
About the tools
What Can You Use NovaBuildr For?
NovaBuildr is designed around practical tasks people regularly need to complete online. Browse related tools from one directory instead of searching for each utility separately.
Students can calculate their GPA and convert measurements . People comparing loans can estimate loan payments , check auto financing or review mortgage costs .
Health-related calculators provide general estimates, while financial and retirement calculators can help you understand different scenarios.
Prepare images with PNG to JPG conversion and image compression . Create website assets with the favicon creation tool .
Creators can also use comparison video and infographic tools to turn structured information into visual content.
Developers can format structured JSON , work with Base64 values , and test API endpoints .
These smaller utilities are useful when you need a focused task completed without opening a larger application.
Freelancers and remote teams can check exchange values , compare regional times and prepare invoices .
If you know what you need but do not see it here, visit the complete tool directory .
Getting started
How to Find the Right Tool
Identify what you need, choose the matching tool and follow the instructions on its page.
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Pick a category
Start with calculators, converters, generators, image tools, developer tools, video tools or infographics.
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Open the tool
Enter your values, upload supported files or provide the information required by the specific tool.
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Use the result
Review, copy or download the output when available and follow any tool-specific notes.
Helpful references
Trusted Sources for Related Information
Some NovaBuildr tools involve measurements, financial planning or other information where official sources can provide useful background and verification.
For measurement standards and related technical information, the National Institute of Standards and Technology provides authoritative reference material.
Visit NISTFor official information related to taxes, retirement plans and U.S. tax rules, consult the Internal Revenue Service.
Visit IRSQuestions
Frequently Asked Questions
Practical answers about using NovaBuildr and choosing the right type of tool.
What is NovaBuildr?
Do I need an account to use NovaBuildr?
Is my data private when I use a NovaBuildr tool?
Are NovaBuildr calculator results accurate?
Do NovaBuildr tools work on phones?
How do I find a tool if I do not see it on this page?
Ready to start?
Find the Tool You Need
Browse the full directory or start with a useful converter for your next task.