Free online tools for everyday tasks

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.

Simple tools

Open a tool, enter the information you need and get a useful result without unnecessary steps.

Built for everyday work

Find calculators, converters, generators, image utilities, developer tools and creative tools in one place.

Easy to browse

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.

Converters 9 tools

Online Converters for Units, Money, Time and Files

Convert measurements, currencies, time zones, timestamps, grades, text and video files from one format into another.

  • Unit Converter

    Convert length, weight, temperature, area, speed, volume and more between metric and imperial units.

  • Currency Converter

    Convert between world currencies for travel, invoices and online shopping.

  • CM to Inch Converter

    Convert centimeters to inches and inches to centimeters for sizing and measurements.

  • GPA to Percentage

    Turn a GPA into an approximate percentage for applications and academic comparisons.

  • Unix Timestamp Converter

    Translate Unix timestamps into readable dates and convert dates back to timestamps.

  • WEBM to MP4 Converter

    Convert WEBM videos to MP4 for editors, phones and platforms that support MP4.

  • Text to Emoji Text

    Restyle plain text with emoji lettering for social posts and messages.

  • Emoji to Art

    Turn emoji into simple text art for posts, chats and creative projects.

Calculators 13 tools

Free Calculators for Money, Health, School and Everyday Math

Use practical calculators for loans, mortgages, percentages, health estimates, grades, retirement planning and everyday math.

Generators 7 tools

Generators for QR Codes, Passwords, Favicons and Documents

Create QR codes, passwords, favicons, flags, placeholder text, invoices and other useful digital assets.

  • QR Code Generator

    Create QR codes for links, text and other supported content, then download the image.

  • Strong Password Generator

    Generate random passwords using the length and character types you choose.

  • Flag Generator

    Preview and download country flag images for websites and projects.

  • Free Invoice Generator

    Create a simple invoice for clients, freelancers and small jobs.

  • Random Name Picker

    Choose a random name for giveaways, classrooms, games and team activities.

Image tools 6 tools

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.

Developer tools 5 tools

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.

  • Base64 Encoder / Decoder

    Encode text to Base64 or decode Base64 values back into readable text.

  • Online API Tester

    Send requests to an API and inspect the response.

  • Word Counter

    Count words and characters for essays, posts, documents and metadata.

Video tools 5 tools

Video Tools for Comparisons and YouTube Images

Create comparison videos, image reveals and other visual content directly from your browser.

Infographics 8 tools

Infographic and Data Visualization Generators

Turn CSV data, rankings and comparisons into charts and shareable visual graphics.

Useful combinations

Tools That Work Well Together

Some tasks are easier when you combine two or more tools. These examples show practical workflows.

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.

Getting started

How to Find the Right Tool

Identify what you need, choose the matching tool and follow the instructions on its page.

  1. Pick a category

    Start with calculators, converters, generators, image tools, developer tools, video tools or infographics.

  2. Open the tool

    Enter your values, upload supported files or provide the information required by the specific tool.

  3. 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.

Measurements and standards

For measurement standards and related technical information, the National Institute of Standards and Technology provides authoritative reference material.

Visit NIST
Tax and retirement information

For official information related to taxes, retirement plans and U.S. tax rules, consult the Internal Revenue Service.

Visit IRS

Questions

Frequently Asked Questions

Practical answers about using NovaBuildr and choosing the right type of tool.

What is NovaBuildr?
NovaBuildr is a collection of online converters, calculators, generators, image tools, developer utilities, infographic makers and video tools. Each tool has its own page with its inputs, results and instructions.
Do I need an account to use NovaBuildr?
No sign-up is needed to open the tools linked from this page. Individual tools may have different technical requirements, which are explained on their respective pages.
Is my data private when I use a NovaBuildr tool?
Privacy depends on the specific tool. Many browser-based tools can process information locally, while features such as image hosting, API testing or services that require live data may communicate with a server. Check the individual tool page before entering sensitive information.
Are NovaBuildr calculator results accurate?
Calculators provide estimates based on the inputs and formulas used by each tool. Currency rates can change, while financial, health and retirement calculations may depend on assumptions that differ from your real situation. Use important results as a starting point and verify them when necessary.
Do NovaBuildr tools work on phones?
The pages are designed to be responsive across phones, tablets and desktop browsers. Resource-intensive tasks such as video processing can require more memory and processing power, especially on older mobile devices.
How do I find a tool if I do not see it on this page?
Open the full tool directory to browse NovaBuildr tools by category. You can also use the site navigation to move between calculators, converters, generators and other tool groups.

Share NovaBuildr

Know Someone Who Might Find These Tools Useful?

Share this directory with coworkers, students, developers, creators or anyone who regularly needs quick online tools.

Ready to start?

Find the Tool You Need

Browse the full directory or start with a useful converter for your next task.