MPen

Name: MPen
Rating: 4.33 (45 reviews)
Author: uchicrew

For example. To mark important sentence. To Write operations during Screencast. MPen is simple graffiti tool.

As of May 2026, MPen has 30,000 users and a 4.33/5 rating from 45 reviews in the Productivity category.

uchicrew Productivity★ Featured

Chrome Web Store ↗.crx

Users+50.0%

30.0K

30,000

Rating−1.8%

4.33

45 reviews

Reviews+2.3%

Version

0.3.1

Manifest V3

90-day change · In the last 90 days this extension gained 10.0K users.

History

1 snapshots

Tracking since May 1, 2026.

View as table

Date	Users	Rating	Reviews	Version
May 1, 2026	20.0K	4.41	44	0.3.1
Now	30.0K	4.33	45	0.3.1

Permissions & access

Permissions: activeTabstoragecontextMenusscriptingnotifications
Host access: None declared

Screenshots

About

Translucent color
You can use it like a highlighter with a translucent color compatible pen.

Undo/Redo
MPen keeps track of 8 undo levels. Usability like a desktop application.

Multi-language
UI supports English and Japanese.


For Windows 8.1/10 users:
There is a problem that you can not click on the touchpad while pressing the letter key. Improved by setting "touchpad sensitivity" of touchpad to "maximum sensitivity" in your Windows settings.
For details, please refer to Microsoft Support. (https://support.microsoft.com/en-us/help/2907018/button-clicks-for-internal-touchpads-and-pointing-sticks-are-not-respo)


# Keyboard Shortcuts

[`] fold/unfold panel
[1] pen
[2] line
[3] rect
[4] ellipse
[5] text
[6] eraser
[7] hand
[8] pointer

[-] clear
[=] toggle option panel
[Backspace] minimize/restore toolbar

[q] pen (pressing)
[w] line (pressing)
[e] rect (pressing)
[r] ellipse (pressing)
[t] text (pressing)
[y] eraser (pressing)
[u] hand (pressing)
[i] pointer (pressing)

[Ctrl]+[z] undo
[Ctrl]+[y] redo
[Ctrl]+[Backspace] exit

[Esc] abort
[`] fold
[Alt] show/hide shortcut key

[Ctrl]+[Alt]+[d] on/off debug logging


# Release Note

Version 0.3.1
- Updated the link to the homepage.

Version 0.3.0
- Migrate to Manifest V3
- Improved rendering quality on HiDPI displays
- Improved memory efficiency
- Error messages are now displayed in notifications ("Notifications" Permission)

Version 0.2.2, 0.2.3
- Release canceled

Version 0.2.1
- Remove unused permission.

Version 0.2.0
- Added Rect tool.
- Added Ellipse tool.
- You can draw vertical/horizontal lines by holding down the Shift key and dragging with Line tool.
- Changed keyboard shortcuts
- Bug Fixes & Other Misc. Changes

Version 0.1.7
- Added Quick Tool feature. You can temporarily use the tool while pressing [QWERTY] key.

Version 0.1.6
- Bug fixes.

Version 0.1.5
- Added Text tool.
- Option panel can now move to left/right.
- You can now open a blank/ruled-line/grid page from the icon menu.

Version 0.1.4
- Added Undo/Redo functions.
- Added Abort command to Eraser.

Version 0.1.3
- Fixed touchscreen issue.

Version 0.1.2
- Added Line tool.
- Added Abort command to Pen and Line. ([ESC] key)

Version 0.1.1
- Add Contextual mouse pointer.

Version 0.1.0
- Initial release.