Your code runs here, in this tab
It compiles and executes in the browser rather than waiting in a queue on a server somewhere, so there is nothing to install and nothing to configure. Close the wifi and it still runs.
Your code runs in your browser
Learn to code by writing code, not by watching it.
Courses that start from nothing, interview practice sheets, hackathons to enter, and your college's quizzes and assignments, all in one free account. Every exercise runs in this tab, with nothing to install, and it keeps working offline.
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- check_circleFree account
- wifi_offWorks offline
- checklistMarked as you go
marks.pyPython
12345678Output
0
lessons
taught in order, nothing skipped
0 hrs
of taught material
summed from the lesson estimates
0
practice sheets
by company and by topic
0
events open now
hackathons and programmes you can still enter
What is inside
One account, and all of this.
Most of it is open to look at before you sign up. Each card says which parts are, and takes you straight there.
What you get here
Built for everyone who makes a coder: the student, the teacher, the college and the employer.
Pick who you are. Everything listed is built; anything marked Soon is built and opening shortly.
Learn, practise, enter hackathons and get noticed. Free.
Everything a student coding towards a first job needs, in one account: courses that start from nothing, interview practice, events to enter, your college’s classwork, and a profile that shows what you have actually done.
Only on DOTCODE
- Your code runs in your own browser, even offline. Run it as often as you like, with no queue and no waiting, and see exactly which character differs from the expected answer.
- Solve a problem once and it is ticked in every sheet that has it, across hundreds of company and topic sheets.
- Hackathons gathered from seven sites every ten minutes and ranked by how worth entering they are, plus 28 yearly programmes like GSoC tracked even while they are closed.
- A certificate that says what was tested and how, which anyone can check with its code.
Learn from zero
- Courses taught in order, with nothing used before it is explained
- Split-screen lessons: read on one side, write code on the other
- Exercises marked the moment you run them, with a diff of what went wrong
- Common doubts answered in the lesson, and lessons read aloud
- A review card after every lesson naming the next step
- XP, streaks, and a grid of every day you learned
- A Python playground to try anything, with no setup
Practise for interviews
- Hundreds of practice sheets by company and by topic, most asked first
- One progress across every sheet: no ticking the same problem twice
- Make your own sheets
- Link your LeetCode handle and verify it, so proven stats stand apart from claims
- Contests with live judging and a leaderboardSoon
- A problem bank with an in-browser editor and server judgingSoon
Hackathons and events
- Every open event with its deadline, its prize and whether it is online
- Star the ones you want, and open the registration in one click
- A page for each yearly programme with when it usually opens
- Your college’s own hackathons: register, make a team with a code, submit your project, see the results
Your classroom
- Join your teacher’s class with one code
- Everything due, quizzes and assignments, in one list ordered by deadline
- Timed quizzes that save every answer as you go, then your result and a review
- Hand in files, or finish a course your teacher set, and see your marks and feedback
Profile and community
- A public profile to put on your CV: solves, courses, activity, experience, education, skills and links
- Your college’s feed: posts, hashtags, reactions and saved posts
- Notes and guides shared by other students, rated and searchable
- Notifications in your browser, free, even with the tab closed
- Jobs and internships, applied for inside DOTCODESoon
- Chat with your collegeSoon
Your account, your control
- Two-step sign-in, and every signed-in device listed so you can end any of them
- Download all your data, or delete your account, from Settings
- No ads and no tracking scripts
Set the work, see who is stuck, and mark less by hand.
Classes, quizzes, assignments and whole courses as coursework, with the integrity signals and exports a real exam needs, and nothing lost when college wifi drops.
Only on DOTCODE
- Set a whole course as an assignment and mark from what each student actually completed, lesson by lesson.
- Exam integrity built in: tab switches and full-screen exits counted on every attempt, with optional automatic submission, and questions and options shuffled per student.
- No lost answers on bad wifi: unsent answers are kept and retried before submission, and an abandoned attempt is still graded.
- Every final-test sitting by your students in one roster: score, time and integrity count.
Teacher access is switched on by the DOTCODE team once you have signed up.
Classes
- Create a class and share one code; students join at once
- See the roster, remove a student, or issue a new code
- Set quizzes and assignments for one class or several
Quizzes and exams
- Single and multiple choice, with partial credit if you want it
- Numeric answers marked automatically within a tolerance you set
- Written answers, with a marking screen and a model answer beside them
- Negative marking, an open and close time, and closing early
- Release results when you choose; students are notified
- A leaderboard, every answer per student, and a CSV export
Assignments
- Ask for files, choosing the types you accept, or a course to finish
- Attach your own materials
- See who has not turned it in, and send them a reminder
- Grade, give feedback and return it
See how they are doing
- Each student’s progress through a course you set
- Final-test sittings with the violations recorded
- Your college’s activity, day by day
Your whole college on one platform, run by your own admins.
Membership you control, every teacher’s classwork in one console, your own hackathons and announcements, and numbers that show how your students are doing.
Only on DOTCODE
- Membership you approve: students join with a class code or ask to join, and your admins decide. An email domain only suggests a college; it never grants entry.
- Host your own hackathon: registration, teams with join codes, project submissions, a judges’ portal with scoring, and published results.
- Help a student who cannot reach their email: a college admin can make a one-time password reset link.
- Quizzes, assignments, events and the feed can be kept to your college alone.
The DOTCODE team adds colleges and appoints their admins.
Membership
- A queue of students asking to join, to approve or decline
- Class codes from your teachers that join a student to your college
- Your college not listed yet? Ask, and the DOTCODE team adds it
One console for your staff
- Every teacher’s quizzes and assignments, classes and rosters
- Analytics for your college
- Every final-test sitting by your students
Events and announcements
- Announcements to your college, with dates
- College events students register for
- Hackathons with teams, judges, scores and results
- Contests for your college, judged liveSoon
Safe by default
- A report button on every post and comment, reviewed and taken down by moderators
- Two-step sign-in for staff accounts
- No ads and no tracking scripts for your students
Hire from what students have actually done.
Certificates you can check, profiles built from real activity, and an applicant pipeline, so you are not relying on a self-reported CV.
Only on DOTCODE
- Every certificate carries a code anyone can check, with no account. It states what was tested and how, and a withdrawn one says so rather than vanishing.
- Profiles keep verified LeetCode stats apart from self-reported claims, beside solves, courses finished and a grid of activity.
- Find students by college, year, problems solved, contests and Codeforces rating, and export the list. Every search is logged.
Recruiter access is set up by the DOTCODE team, who link your account to your company.
Check a candidate
- Verify any certificate by its code
- Public profiles with real activity, not just a summary
Find people
- Search with the filters above and shortlist
- Export a shortlist as CSV
Post and hire
- Post jobs and internships, aimed at the colleges you chooseSoon
- Students apply inside DOTCODE with a note and a CV linkSoon
- Move each applicant through applied, shortlisted, hired or rejected; they are told each timeSoon
Lead DOTCODE at your college.
For students who want to grow a coding community on their campus, and be seen doing it.
Only on DOTCODE
- Your own referral link and code. Everyone who signs up through it within 30 days counts as yours.
- A dashboard of your referrals, your points and your rank, and a public leaderboard of ambassadors.
Open to students at a college on DOTCODE. Sign up first, then apply.
What you get
- Points for every referral, and a notification each time
- Your rank among ambassadors everywhere
- A code made for you when you are approved
What you do
- Bring your classmates and clubs onto DOTCODE
- Help run events and hackathons at your college
Building with DOTCODE? Developers can request an API key from the developer page.
What you get
Built for someone who has never written a line before.
Read on one side, write on the other
Every lesson is a split screen: the explanation stays put while you type, and the checks tell you the moment it works. Where a second view of your own work would help, such as the outline of a page or what its markup really means, that is what sits beside the editor instead.
Errors are taught, not hidden
Whole lessons hand you a program that is already broken and ask you to fix it. The errors everybody meets are met here on purpose, once, in daylight, rather than by accident at midnight.
A final test that means something
A timed paper at the end, mostly code. Tab switches are counted, leaving full screen pauses the paper, and your teacher sees every attempt.
A certificate anyone can check
Where a course issues one, it carries a code. A recruiter can verify it without making an account, which is what makes it worth putting on a CV.
Then the practice catalogue
Hundreds of curated sheets, organised by company and by topic, with your progress tracked across all of them. Every course ends by handing you straight to it.
The catalogue
Whole courses, taught in order.
Nothing is used before it is taught. Every module ends with a project that combines what it covered and introduces nothing new, and every course ends where the practice sheets begin. You can read any of them without an account.
Browse all coursesarrow_forward
More are being written. This list is the catalogue, so it is never out of date.
Write your first line of code in the next two minutes.
No card, no download, no environment to set up.
- 1
Sign up free
Your name, an email and a password. It takes about two minutes.
- 2
Pick where to start
A course from zero, a practice sheet, or an event to enter.
- 3
Join your class
Type the code your teacher gives you, and their quizzes and assignments appear.
One thing said plainly: the final test marks its coding questions in your own browser, so the certificate reports which half was checked on our server rather than printing a single confident number.