Creating a free online database may seem overwhelming if you've never ventured beyond a Word document or a spreadsheet. Seeing unfamiliar terms such as SQL, NoSQL, schemas, and queries when you search "how do I build a database?" on the Internet might make you think you need years of education to understand, let alone build, your own database.
But databases don't have to be complicated or expensive. In fact, most major online database providers offer free tiers that work perfectly well for personal projects, learning, or even small business needs—and you don't have to understand what schemas and queries are to build them.
While it's true that you don't need to be a computer whiz or know the technical terminology to build a free online database, there are some things you need to know to pick the best online database for you. We'll focus on those things in this guide.
Whether you want to grow your skill set for work, build something for yourself, or set up the foundation for a custom application or web application, by the end of this article, you'll walk away with a better understanding of the essential tools and what to look for when exploring the free tiers.
We'll start with the definition of a simple database and then learn about two of the most popular online databases: relational (SQL) and non-relational (NoSQL) databases. We'll explore how they work, what they do best, and if a free plan is right for you.
What is a database?
Let's start with a simple explanation of what a database is: A database is a single place to manage data in a structured way so you can find what you need when you need it. Without databases, information would be scattered across separate files that would have to be linked together with extra code or manual effort.
You may not realize it, but you probably access several databases each day. For example, when you scroll through your phone contacts to find someone's phone number, organize photos by person or event, or log expenses and sort them by category in a spreadsheet, you're working with a simple application powered by a database system. All that information has to be stored somewhere, and a database gives you one central location to keep it organized.
Two popular database types: Relational vs. non-relational databases
Both of the database types offer free tiers, so you can explore and build without a financial commitment.
Relational databases
Also known as structured query language (SQL) databases, these traditional, tabular databases store data in a structured way, but in a rigid format that can be harder to adapt as needs change.. Data is organized into tables subdivided into rows and columns, and the tables can be linked (or "related") to each other. This type of database is a good fit for structured data with obvious relationships. For example, it can connect customer data to the products or services they've purchased, which helps with order tracking, shipping, and customer relationship management.
Examples of SQL relational databases
Oracle, MySQL database, PostgreSQL, and Microsoft SQL Server
Non-relational databases
Non-relational databases, or NoSQL databases, are more flexible than SQL databases because users don't have to put data into tables or define strict rules at the outset. These databases can typically handle messy, unstructured data, or constantly changing data without much setup.
Examples of NoSQL non-relational databases
MongoDB, Redis, and Cassandra
Free vs. paid: Which online database service fits your needs?
From fully-managed, cloud-based services like MongoDB Atlas to self-hosted options like MySQL and PostgreSQL, to user-friendly solutions like Airtable, free plans and paid options typically handle the same basic tasks.
The paid versions offer more storage capacity, dedicated support, and advanced features. Many of today's popular web applications started on free tiers and upgraded to paid solutions as they grew.
There are many free database options available online. Listed below are some popular uses for data management.
- Organize a home library.
- Manage customer data for a small business.
- Categorize content for a website.
- Manage personal finances.
- Keep track of job applications.
Key considerations when choosing a free database
Free online database providers make it easy to start building. However, before you begin, closely examine what each free plan includes—and what it doesn't. Free doesn't mean unlimited.
Below are a few things to remember as you explore your options.
Storage and usage limits
Most free tiers limit how much data storage you can have and how many users can use the database simultaneously. These limits are usually generous enough for simple applications, personal projects or learning, but they can vary platform to platform.
Ask yourself these questions before choosing your free database:
- Will I be the only one using the online database, or will I invite others?
- Am I storing a few dozen entries or several thousand rows of data?
- Will I hit the free tier's limits quickly or is there the capacity to grow?
It's a good idea to answer these questions before you start building, especially if you hope to expand later.
Performance priority
Free tiers in cloud database services may not offer the same performance levels as paid accounts, which may mean slower speeds or occasional downtime during peak usage. If your project is user-facing or time-sensitive, consider this when comparing options.
Basic security
Most free online database providers typically include essential security features like encrypted connections, but advanced features could incur a fee. You may need stronger data security if your database includes sensitive information, especially personally identifiable information (PII) like names, addresses, or credit card information.
Encryption
Encryption scrambles your data so it can't be read by anyone without proper access. Look for platforms that encrypt your data in transit (while it's moving between systems) and at rest (when stored in the database). Without encryption, your data could be vulnerable if intercepted or accessed by the wrong person.
User permissions
If you have teammates who need varying levels of access or you plan to connect third-party apps, make sure your free plan supports multiple levels of user permissions. For example, you might want one teammate to add new data but not delete data, or allow a program (like a microservice) to read data without changing it. Setting permissions like this helps prevent accidental mistakes and protects sensitive information.
Backups
Find out if your free database plan includes automatic backups. Without backups, if your data is lost or corrupted, you may lose it permanently.
Some free tiers, including MongoDB Atlas M0 clusters, don’t provide automatic backups, but there is a fix: You can create your own copies by running a manual backup or using a simple script. Always check whether backups are included, and how often they’re created, before you commit to a platform so you can set up your own backup methods.
Planning for growth
The best time to think about scalability is before you need it. Even if you're starting small, it helps to know how easy it is to move to a paid plan, or move your data to another database management platform.
Ask these questions when researching free database plans:
- Will I be able to upgrade my plan without having to rebuild my entire database?
- Does the platform offer easy data export if I ever need to switch?
- What does the next pricing tier look like, and how much will it cost if my project takes off?
By exploring what your free database offers, and what it doesn’t, you’ll be able to choose a solution that can grow with you rather than something you will quickly outgrow.
Popular free database options
Below are some of the most popular options. The right one depends on your needs, technical skill level, and what you're trying to build.
MongoDB Atlas
MongoDB Atlas is a good fit when your data doesn’t fit neatly into rows and columns. Its flexible document model lets you add information as you go, which works well for unstructured or frequently changing data. You also don’t need to rebuild the schema every time your code or requirements shift. With a free MongoDB Atlas account, you can spin up a small cluster—a basic cloud database you can use to store and test your data—so you can experiment and learn safely without risk.
MySQL
MySQL is a go-option when users want something straightforward. It works well when your data fits into predictable boxes, like tracking customer names, product inventories, or anything organized like a spreadsheet.
PostgreSQL
The PostgreSQL database can do more than other SQL solutions, but it has a higher learning curve. It’s great for projects that require custom logic, high data integrity, or more complex data types. It’s a strong option for users who need scalability and performance beyond basic use cases. It's not impossible to learn, just less plug-and-play than others.
Airtable
Airtable is a spreadsheet-style online database designed for simplicity and visual organization—great for project planning, workflow automation, or managing customer relationships. While not as scalable as traditional database systems, it’s excellent for individuals and teams working on applications that benefit from built-in data visualization.
Other options to consider
In addition to hosted solutions like MongoDB Atlas and self-managed tools like MySQL database, platforms like Google Cloud offer scalable infrastructure for databases and integrate easily with other cloud services. You can start with their free tier and gradually build more complex applications with tools for AI, analytics, and data warehousing.
How to get started with MongoDB Atlas
Getting started with MongoDB Atlas is quick, especially for first- time users building their first database. Here’s how to do it:
- Create a free account.
- Set up a free cloud database (called a “cluster”).
- Choose a region close to your users or data.
- Decide who’s allowed to connect, then make a username and password for them.
- Start adding data using the built-in web tools or connect with MongoDB Compass.
Once you're set up, you can explore, build, and scale your data-driven applications at your own pace. Most free database tiers come with documentation and tutorials, and many also provide sample data so you can start building and learning right away.
Sign up for a free MongoDB Atlas account
Conclusion
Free database solutions have opened the door for anyone who wants to work with data. Whether experimenting with app development, or laying the groundwork for a secure business platform, you should be able to find a free tier or free trial that fits.