Fast in hour three
Drawing happens on your device first, and saving runs quietly in the background. The pen never waits for the internet, even late in a long lesson.
your writing never waits on the Wi-Fi
free online whiteboard for teachers and tutors A clean slate for every lesson.
Clean Slate is a free online whiteboard built for teaching. Write with Apple Pencil, keep the worksheet beside the board, and bring a whole class in with one code. Whatever you teach, it’s just as quick three hours in as it was at the start.
The demo opens a real board in your browser. Nothing to install, nothing saved.
- In daily lessons for 3+ months
- About 20 students using it regularly
- Free, with no limit on boards
Made for
MathsScienceEnglishLanguagesHistoryand the rest
your worksheet, right beside the board
every tool says what it does
palm on the screen? no stray marks
Why teachers switch to Clean Slate.
Most online whiteboards are built for office meetings. These six things are built for lessons.
Every student gets a board
Students join with a 6-character code and no account. They follow your board, work on their own, and you can look in on anyone and pin a comment.
free, with no 2-hour session limit
The worksheet beside the board
Open a PDF or photo in a side pane, size it how you like and write on it. Nothing to print and nothing to screenshot.
no work or school account needed
Real teaching tools
Exact shapes with the angles marked, a ruler and compass, graph paper, simulations, and a scientific calculator that gives exact answers.
new: shapes, in 2D and 3D
Made for the Pencil
Rest your hand on the screen without stray marks or switched tools. Pencil-only mode turns on by itself the first time you write.
works on iPads back to 2014
Free, with no catch
No board limit, no ads, no card and nothing to install. Try the demo board without even signing in.
most free whiteboards stop at 3 boards
One board for every subject.
Pick the paper and the tools that suit the lesson. The same fast board works for an equation, an experiment, a poem or a verb table.
Maths
Exact shapes, ruler and compass, graph paper, and a scientific calculator with exact answers.
Science
Label diagrams, and drop a PhET simulation right next to your notes.
English & humanities
Paste in a passage or a source, highlight it and annotate the margins.
Languages
Lined paper for handwriting practice, and typed text boxes for new vocabulary.
Built for teaching, not meetings.
Most whiteboards are made for office brainstorms. Clean Slate has what a lesson needs, one tap away and clearly labelled.
in every lesson
Pen, highlighter, text
Write, highlight and type in any colour. The eraser only removes ink, so the page stays clean.
Worksheet side by side
Open a PDF or photo beside the board and drag the divider to size it. You can annotate it too.
LinedSquaredDotsIsometric
Paper to suit the task
Blank, lined, squared, dot grid or isometric. The pattern stays put when you zoom.
Copy, paste, move anything
Box-select work to reuse it. Paste a screenshot or drop in a picture and it lands on the board.
when the lesson needs more
Ruler & compass
Construction tools that sit on the board. Rule a straight line, measure a length or draw a perfect circle with your Pencil.
Graphs and grids
Cartesian or polar, any scale, labelled in degrees or radians, with a live preview first.
Simulations on the board
Paste a PhET link (or another interactive) and move or resize it next to your working.
Scientific calculator
A Casio-style calculator with exact answers like ½ and 2√2. Tap Add to board and the answer lands on your page.
new: exact shapes
Shapes, with the angles and lengths marked
Drop an accurate polygon, triangle, quadrilateral, circle or 3D solid straight onto the board. Set the sides, angles and lengths you want, and they’re labelled for you.
- Sides, interior angle and exterior angle are linked: change one and the others follow.
- Turn a 3D solid round before you add it, with the hidden edges dashed.
- It lands as ordinary ink, so you can move it, copy it or rub parts out.
See the real board.
These are screenshots of Clean Slate itself, not mock-ups. Everything in them is free, and you can try it all on the demo board.
classroom mode
Sit beside thirty students at once.
Start a live class and students join with a short code. They don’t need accounts. They follow your board, work on their own, and you can look at anyone’s working and leave them a note.
- 1Go live. Your board becomes the master board everyone sees.
- 2Students join with the code. Each one gets their own mini-board to work on.
- 3Check in on anyone. Open a student’s board live and pin a comment exactly where it matters.
Students (24)CODE 7KQ42M
2x + 3 = 11
2x = 8
x = 4 ✓Aisha
2x = 8
x = 4 ✓Aisha
2x + 3 = 11
2x = 14
x = 71Ben
2x = 14
x = 71Ben
11 − 3 = 8
8 ÷ 2 = 4Chen
8 ÷ 2 = 4Chen
2x + 3 = 11
take away 3Dara
take away 3Dara
2x = 11 − 3
x = 4Eli
x = 4Eli
x = 8 ÷ 2
= 4Farah
= 4Farah
1YOU → BEN
Nearly! What happens to the +3 when it moves across?
Photosynthesis
6CO2 + 6H2O
→ C6H12O6 + 6O2
works on older school iPads too!
Feels like paper under your Pencil.
Palm-safe by design
Nothing to tap at the bottom where your hand rests, and the toolbar ignores brushes from your palm mid-stroke.
Pencil-only switches on by itself
The first time you write with a stylus, fingers go back to scrolling and zooming. You can always turn it off.
Runs on the tablet you already own
Works on iPads going back to 2014, on Samsung and other Android tablets, and on laptops. Nothing to install.
switching from Microsoft Whiteboard?
Your lessons have somewhere to go.
Microsoft Whiteboard no longer works with personal Microsoft accounts. It’s now only for work and school Microsoft 365 accounts. Clean Slate works with any Google account, and the pen, eraser and menus are where you expect them. See how it compares as a Microsoft Whiteboard alternative.
- 1Sign in to Clean Slate with any Google account. It’s free.
- 2Bring your old work across. If you exported boards as pictures, drop them straight onto a new board.
- 3Share your class code and carry on teaching where you left off.
What “free” usually gets you
| Whiteboard | On the free plan |
|---|---|
| Clean Slate | Unlimited boards, live classes with no time limit, no ads |
| Miro | 3 editable boards |
| FigJam | 3 files |
| Lucidspark | Only your 3 newest boards stay editable |
| Whiteboard.fi | 20 students, 1 session at a time, sessions end after 2 hours |
| Microsoft Whiteboard | Work or school Microsoft 365 accounts only |
Free-plan limits as published in September 2026 (HuddleIQ, SoftwareSuggest). Check each site for the latest.
Tell us what to build
Send an idea or a bug report from inside the app, screenshots and all. It goes straight to the developer.
Share with an email
Add a student or co-teacher and you can all write on the same board at once, live.
Easy to find last week’s lesson
Every board gets a preview picture, so the lesson you need is one glance away.
New tools, shown to you
When something new arrives, a pop-up shows what changed, and “Show me” walks you through it step by step on a real board.
One whiteboard, however you teach.
Looking for something specific? Each of these pages goes into the detail.
Whiteboard for teachingA free online whiteboard built around how lessons actually run.Read more →
Whiteboard for tutoringOne-to-one and small-group lessons, with the worksheet beside the board.Read more →
Whiteboard for mathExact shapes, ruler, compass, graph paper and a calculator with exact answers.Read more →
Whiteboard for the classroomEvery student gets their own board. Join with a code, no accounts.Read more →
Whiteboard with no sign-upOpen a board and draw. No account, no login, no download.Read more →
Whiteboard for iPadMade for Apple Pencil, with palm rejection, in Safari.Read more →
Microsoft Whiteboard alternativeFree, works with any Google account, on any device.Read more →
Jamboard alternativeA free replacement for teachers, with no student sign-in.Read more →
Questions, answered.
Short, straight answers about what Clean Slate does and doesn’t do.
Is Clean Slate really free?
Yes. There is no paid plan, no board limit and no ads.
Can I try it without signing up?
Yes. The demo board opens with no sign-up, no login and nothing to download. Nothing you draw there is saved. Sign in with a Google account when you want to save and share boards.
Do my students need accounts?
No. Students join a live class with a six-character code and their first name.
Does it work on an iPad with Apple Pencil?
Yes. It runs in Safari on iPadOS 15 and newer. Once you write with a Pencil, only the Pencil draws, and resting your palm on the screen leaves no marks. See the whiteboard for iPad.
Can I open a PDF on the whiteboard?
Yes. Open a PDF of up to 30 pages, or an image, in a pane beside the board, and write on it.
Is it a replacement for Microsoft Whiteboard or Jamboard?
Yes. Microsoft Whiteboard no longer works with personal accounts and Google shut Jamboard down in 2024. Clean Slate works with any Google account in any browser. See the Microsoft Whiteboard alternative and the Jamboard alternative.
Can it draw accurate shapes for maths?
Yes. Insert, then Shape draws polygons, triangles, quadrilaterals, circles and 3D solids to the sides and angles you set, with the measurements labelled. See the whiteboard for math.
Does it have video or audio calls?
No. Use it beside Zoom, Google Meet or Teams.
Are my boards saved?
Yes. When you're signed in, boards save automatically. A board that nobody opens for 30 days is deleted, and you get an email first with a button to keep it.
Which devices and browsers does it work on?
Chrome, Edge, Firefox and Safari, on iPads, Android tablets, Chromebooks, Windows, Mac and Linux. There is nothing to install.
Homework, due next lesson: