Choose a PDF, then click anywhere on the page preview: a numbered pin drops and a comment box opens right there — type your words and save. Click a pin at any time to read, edit or delete its comment, or drag pins in Select mode to move them. Every comment is saved into the downloaded PDF as a real annotation readers can open, with the numbered pins printed on the pages and a summary page listing all of them. Runs fully in your browser — nothing is uploaded, and your original file is never changed.
Keyboard: Ctrl+Z undo · Ctrl+Shift+Z redo · Ctrl+C/X/V copy, cut, paste · Ctrl+D duplicate · Delete removes the selected comment · arrow keys nudge it (Shift = 10pt) · Esc deselects. Select a comment by clicking its row in the list.
No comments yet. Click on the page and type your comment right there — it will appear here, and in the downloaded PDF as a real note readers can open.
Say it where it belongs: real sticky-note comments, placed exactly on the words they are about.
100% free · No sign-up · No daily limits · No watermarks · Processed in your browser — files never leave your device
Click where a comment belongs and type it in the editor that opens right there: it is saved as a real PDF annotation — a note icon on the page that readers click to read your words — with a numbered pin on the page and a summary page at the end, so nobody can miss it.
A reviewer works through a report: “Source for this figure?” on page 3, “This date contradicts page 9” on page 7 — the author opens the file and each note is parked on the exact sentence it questions.
Comments are stored as standard PDF text annotations — the format’s own sticky-note mechanism — created at the low level of the document structure with your exact words as the annotation contents and your name as its author when given. The download carries them three ways: the real annotations themselves, the numbered pins drawn on the pages, and a Comments summary page appended at the end listing every comment by page and number. Before the file downloads, the tool reads it back and verifies that every annotation’s text survived the save — if a difficult source file corrupts the write, the document is rebuilt and checked again rather than handing you a file with comments missing.
As a note icon at the point you clicked — clicking or hovering it in any mainstream reader opens your full text. The numbered pin is also drawn on the page, and the Comments summary page at the end lists every comment by page and number.
Yes — click its pin on the page, or its row in the Comments list, and the editor reopens with your text ready to change or delete. In Select mode you can drag a pin to move it, and Undo (Ctrl+Z) steps back through changes.
Yes — they are standard PDF annotations, so Acrobat and other mainstream readers show the note icon and open your text on click, with your name as author if you gave one.
The numbered pins are page content, so they print with the document. Annotation text follows your reader’s print settings (most readers leave annotation contents out by default), but the summary page prints like any other page, so a printed copy can carry the full list.
No — it is optional. When given, it is stored as the annotation’s author, which review tools display.
No. Commenting runs entirely in your browser.
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