Highlight key passages, drop comment boxes, and mark up PDF pages directly in your browser without installing software.
When reviewing lecture slides, legal drafts, or project reports, printing pages just to write margin notes wastes time and paper. Our browser-based annotation tool lets you highlight key sentences, place custom text callouts, and add visual markups directly on any PDF page. You can adjust colors, text sizes, and opacity so your feedback stands out clearly while keeping the underlying text crisp and readable. Because every markup is applied locally on your device, confidential contracts and academic papers never leave your computer or phone, making it safe to use even on shared or low-bandwidth connections.
Yes. Annotations are saved directly into the standard PDF structure so they appear properly in Adobe Acrobat, browser viewers, and mobile PDF apps.
No. Highlights use a semi-transparent layer so the original text underneath stays completely legible.
Never. All annotations are rendered locally in your browser memory, keeping your documents private.