Highlight and annotate a PDF
Drag across any passage to highlight it in yellow, green, pink or blue. Draw, add arrows, boxes and notes, then download the marked-up PDF.
or drop your PDF here
Your files never leave your device.
- Your files stay with you
- Free, no watermark
- Works on any device
In short
To highlight a PDF, open it in Folio, pick Highlight and drag over the text. Choose yellow, green, pink or blue. You can also draw freehand, add boxes, circles, arrows and text notes, then download the annotated PDF without uploading it anywhere.
Updated
How it works
- 1Choose your PDF.
- 2Pick Highlight and drag over the text you want to mark.
- 3Add notes, arrows or shapes if you like, then download.
Highlights that look real
Folio blends the highlight with the page like a real marker, so the text underneath stays black and crisp, on screen and when printed.
Tools for reviewing documents
- Highlighter in five colours
- Freehand pen for underlining and circling
- Rectangles, circles, lines and arrows
- Text notes in any colour
Why Folio
Your files stay with you
Everything runs in your browser. Nothing is uploaded, so private documents stay private.
Free, no watermark
No sign-up, no trial and no logo stamped on your pages.
Works on any device
Windows, Mac, Linux, Android or iPhone. No software to install.
Frequently asked questions
Is Folio really free?+
Yes. Every tool is free to use, with no sign-up, no trial and no watermark on your pages.
Can I remove a highlight?+
Yes. Select it and press Delete, or use Undo.
Are my files uploaded anywhere?+
No. Folio opens and edits your PDF inside your browser. The file never leaves your device, so nothing is stored on a server and nobody else can see it.
Will the highlights show in other PDF viewers?+
Yes. They are drawn into the page, so they appear the same everywhere.
More PDF tools
Edit and sign
- Edit PDFChange text, add text and images, sign, highlight and draw.
- Sign PDFDraw, type or upload your signature and place it on the page.
- Add text to PDFType anywhere on a PDF, in any size and colour.
- Fill PDF formType into form fields, tick boxes and choose options.
- Redact PDFPermanently remove sensitive text and images.
- Whiteout PDFCover text or images with white, then type over them.
Organise pages
- Merge PDFCombine several PDFs and images into one file.
- Split PDFBreak a PDF into several files by page range.
- Rotate PDFTurn pages that are sideways or upside down.
- Delete PDF pagesRemove the pages you don't need.
- Organise PDFReorder, rotate, duplicate and insert pages.
- Add watermarkStamp text such as CONFIDENTIAL across every page.
- Add page numbersNumber every page, in the position and style you choose.