The only course platform with
Over 5,000 online courses with digital certificates
for you to study for free across various fields of knowledge.
Download our app via QR Code or the links below:
+10
million
installs
4,8/5
App store
ratings
+5000
Free video courses
with exercises
+1000
Free audiobooks
and ebooks
View all courses

Spanish for Beginners: Essential Grammar and Vocabulary (Season 1)
5h23m
20 exercises

Spanish for Kids
53m

Spanish course A2
11h23m

Spanish Verbs for beginners
3h42m
15 exercises

Spanish course A1
10h51m
6 exercises

Spanish
6h22m
11 exercises

Spanish full course B1
1h29m
15 exercises

Spanish
8h55m
27 exercises

Learn Spanish Naturally
4h54m
5 exercises

Complete Spanish Grammar for Beginners A1-A2
4h08m
10 exercises

Spanish lessons complete
24h52m
23 exercises

Spanish listening beginners to advanced
19h30m

Spanish full course A1
2h17m
29 exercises

Spanish course B1
12h54m

Spanish Lessons for Beginners
3h11m
10 exercises

Spanish Full course
3h46m
6 exercises

Spanish Grammar
19h11m
23 exercises

Spanish for beginners
4h01m
25 exercises

Spanish for beginners A1 level
3h50m
21 exercises

Spanish Vocabulary
New
5h38m
33 exercises

Free CourseConvolutional Neural Networks for Computer Vision: Detection, Recognition
New
6h01m
26 exercises

Free CourseJasmine Testing Framework Course
New
8h45m
27 exercises

Free CourseMastering Jest in React – The Complete Testing Series
New
1h17m
10 exercises

Free CourseFrench Pronunciation Course: Master Vowels, Nasals and the French R
New
1h43m
21 exercises

Free CourseReactJS Course For Beginners
New
8h29m
17 exercises

Free CourseManagerial Accounting Complete Course
31h51m
42 exercises

Free CourseReact Hooks Tutorial
New
1h17m
2 exercises

Free CourseReact Basic Hooks
New
1h32m
12 exercises

Free CourseAll 12 English Tenses (Complete Guide)
10h38m
17 exercises

Free CourseJavaScript Objects and Prototypes In-depth
New
2h15m
13 exercises

Free CourseReact.js Unit Testing and Integration Testing Tutorial
New
3h36m
3 exercises

Free CourseEnglish Grammar for Beginners (A1) Complete Foundations Course
2h24m
23 exercises

Free CourseEnglish Pronunciation Course: Master All 44 IPA Sounds and Clear Speaking
1h21m
22 exercises

Free CourseCSS Complete Tutorial
8h30m
49 exercises

Free CourseComplete ECMAscript6 ES6 Course
New
5h58m
51 exercises

Free CourseUsing the Fetch API in JavaScript and ASP.NET Core
New
1h14m
6 exercises

Free CourseWorking
New
4h36m
19 exercises

Free CourseAsynchronous JavaScript: From Callbacks to Async/Await
New
2h05m
19 exercises

Free CourseMaster All 49 American English Sounds: Vowels and Consonants
New
7h39m
41 exercises

Free CourseEasy English Conversations for Beginners: Daily Life and Simple Questions
59m
13 exercises
Interactive tutorials
Find what is filling your Windows drive, safely remove unnecessary files and apps, move or offload large files, and configure automatic cleanup. Verify the space recovered and build a maintenance routine using your own PC. Windows 11 is the primary reference, with Windows 10 navigation differences noted.
Start tutorial
Build an About Me page on your own computer using HTML and CSS. Add structured content, links, and an image; style the page; make it fit smaller screens; and fix common mistakes.
Start tutorialExercises
Test your knowledge of diabetes medications, including mechanisms, adverse effects, insulin profiles, and safe clinical use.
Start exercisesTest your ability to use a, an, the, and no article correctly in practical English sentences.
Start exercisesTest your knowledge of numerical differentiation, integration, ODE solvers, stability, convergence, and computational modeling.
Start exercisesTest your knowledge of patents, trademarks, copyrights, trade secrets, ownership, licensing, and IP protection for new ventures.
Start exercisesTest your ability to identify causal flaws, confounders, alternative explanations, and evidence that strengthens causal conclusions.
Start exercisesTest your knowledge of ZIP archives, lossless compression, extraction, compression ratios, multipart files, and archive safety.
Start exercisesThousands of online courses in video, ebooks and audiobooks.
To test your knowledge during online courses
Generated directly from your cell phone's photo gallery and sent to your email
Download our app via QR Code or the links below:.

Why Cats Purr: The Physiology Behind One of Their Strangest Sounds
Purring isn’t just about happiness. Learn how cats produce this sound, what it really communicates, and why it happens even when they’re stressed.

How Access Control Systems Work: Keys, Cards, PINs and Biometrics
A practical look at how access control works: mechanical keys, card and fob systems, PIN codes and biometric authentication compared.

Hangul Explained: The Logic Behind the Korean Alphabet
Discover the logic behind Hangul, the Korean alphabet: how its consonants and vowels were designed, and how syllable blocks work.

Rites of Passage in World Religions: Marking Birth, Adulthood, and Death
Explore how Christianity, Judaism, Islam, Hinduism, and Buddhism mark birth, coming of age, marriage, and death through distinct sacred rites of passage.

The Psychology of Misdirection: How Magicians Control What You See
Discover how magicians use misdirection to control attention, timing, and expectation, and what cognitive science reveals about why these techniques fool the mind.

Vendor Selection and RFP Basics: How Organizations Choose the Right Suppliers
Learn how organizations use RFIs, RFQs, and RFPs to evaluate suppliers, avoid costly vendor mistakes, and build reliable long-term purchasing relationships.

Intermittent Fasting: What the Science Actually Says About Eating Windows
A clear look at how intermittent fasting works, what research actually shows about its benefits, and who should be cautious.

Email Marketing Fundamentals: How to Build Lists That Actually Convert
Learn how to build an engaged email list, choose the right email types, and track the metrics that actually drive conversions.
Nowadays, the internet offers a wide range of free courses for those who want to improve their qualifications and, consequently, increase their knowledge and even guarantee better opportunities in the job market. However, it is necessary to be careful not to fall into holes and end up wasting time.
First, think of a course on any topic. Now imagine being able to do it without paying anything for it – not even for the certification at the end of it. That's what you find at Cursa, a project focused on offering free courses and content through the website and application available for iOS and Android.
As mentioned above, Cursa courses are not only available in the most varied segments – but also completely free and online. You can still do them any day or time of day, depending solely on your availability.
That's what you read. Want to become an entrepreneur? Learn to do complicated math? Want to improve your writing? Learn to program? Improve skill with spreadsheets?
Having decided that, go to the Cursa app or website to check the available course options and start yours as soon as possible. With Cursa you not only take the courses but leave with the certification in hand.
To take a free online course, the first step is to decide what you want to learn.
And there's more: if you can't decide between one topic or another, you can also start with a knowledge trail. Trails are currently available with diverse content for those who: want to make an extra income or start a new venture in the comfort of their own home, work as an operator or inspector in supermarkets, become a Front End or software developer or want to start a business, but don't even know where to start.
At Cursa you will find courses to increase your professional qualification even if you are unemployed, since the courses are free and even certified. In this way, you can take advantage of your free time to study and can also include them in your resume, increasing your chances of getting a good job in the job market.
Not sure what to choose? Cursa offers a wide range of courses in the areas of computers, languages, high school, management and business, health, music, law, art and design and so on.
About
After completing the course you will have free access to the digital certificate of course completion.
How to get it for free: It is only possible to issue the certificate in our application, which can be downloaded from Google Play or App Store, so you can take the online course here and use the app only to issue the certificate. Being that you can also take the courses through the app if you wish.
In digital format: After completing the course and generating the certificate through the application, the image of the same will be generated in the photo gallery of your cell phone and will also be sent to your email.
Why the certificate is important: You can use it to improve your resume, to rise in careers or positions, to enrich your knowledge and among several other applications.
See more about the Certificate
+ 10 million
students
Free and Valid
Certificate
60 thousand free
exercises
4.8/5 rating in
app stores
Free courses in
video and ebooks