Transform slides
into clean notes.

Clean PDFs from messy slides.

Drop PDF files here
or click to browse · multiple files supported
⇄
Invert Colors
Dark slides to light
◫
Clear Background
Remove noise
⊞
Multi-layout
Rows × columns
⬚
Per-slide Edit
Paint, invert, erase
◻
Logo Removal
Auto-erase region
↧
High Quality
2× render output
How it works
01
Upload your PDFs
Drop one or multiple PDF lecture slide files. No sign-up, no server — everything runs privately in your browser.
02
Select & arrange slides
Pick which slides to keep, remove extras, and edit individual pages with the built-in per-slide editor.
03
Configure enhancements
Invert dark slides, clear backgrounds, strip logos, apply grayscale, and choose how many slides fit per page.
04
Export & download
Get a clean, print-ready PDF instantly. Perfect for printing notes or studying offline.
0 selected  ·  0 removed
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Loaded PDFs
0
To Process
0
Removed
Enhancement
Apply filters to your slides
Filters
Invert Colors
Dark to light — best for lecture slides
Clear PDF Background
Remove background noise
Grayscale
Shades of gray
Black & White
Pure black & white threshold
Remove Logo
Enable Logo Removal Erase a fixed region on every page
Output Quality
Low
Medium
High
Layout
Arrange your document pages
Document Size
Original
A4
Orientation
Portrait
Landscape
Slides per Page
Rows
Columns
Layout Preview
1
1×1
per page
Page Numbers
No
Yes

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Document Info
PDF
output · Notelix.pdf
Enhanced PDF Document
0
Pages
0
Slides
Applied Filters
Edit Page
Selection Tool
Rectangle
Circle
Edit Action
Invert Colors
Paint Black
Paint White
Erase
History
Draw a selection, then apply or cancel
Rectangle · Invert Colors
Select Logo Region
Logo Region
Shape
Rectangle
Circle
Position
Top Left
Top Right
Bot Left
Bot Right
Width
13%
Height
13%
Page
⠿
⠿
Logo will be removed from all pages