Annotate a PDF — highlight, comment, draw.
Highlight in 6 colours, leave sticky notes, draw freehand. Save once, share everywhere.

Drop your PDF to annotate
- check 6 highlight colours
- check Sticky notes
- check Freehand drawing
Stop printing PDFs to highlight. Mark it once. Share it everywhere.
Research papers, contracts, study guides, lease agreements. Highlight key clauses, sticky-note your team, draw arrows where the math is wrong. Annotations are baked into the file and visible to anyone — even on the iPhone reader.
Annotate in three clicks.
No downloads, no accounts, no friction.
Drop your PDF
Any PDF, up to 100 MB.
Pick a tool
Highlighter, sticky note, freehand pen, shape, callout, strikethrough.
Download annotated PDF
Annotations baked in, visible in every reader.
Need to do something else with your PDF?
Convert, merge, compress, sign, redact, summarize — every PDF task in one place.
Built for the docs you actually read.
Four files. Four deadlines. One tool.
The moments when it has to be done before you log off.
"Needed it sorted before the 9am call."
A grad student in Lisbon opens her laptop at midnight with one PDF task standing between her and submission. Done in under a minute, no install, no signup.
school Done in 1 min"Sorted before the standup."
A founder in Berlin gets a Tuesday-morning PDF from a Series-A investor. Coffee in one hand, baby in the other. Handled from the phone in 14 seconds.
draw On mobile"The portal closes at 5. It is 4:51."
A consultant in Singapore has nine minutes before the upload portal locks. Drops the PDF in, gets the clean file back, submits with three minutes to spare.
spellcheck Beat the clock"Forty files. One afternoon."
An operations lead in Madrid inherits a folder of 40 PDFs to process before a 6 AM flight. Batches them one after another, archives the clean copies, sleeps on the plane.
badge Bulk, fastReviews from people who actually annotated the file.
"The fastest PDF tool I've used."
I work with PDFs every week. This is the only one that just works — no install, no watermark surprise, no 20-minute wait. In and out in under a minute.
"Saved me a stack of admin."
I had 30 vendor PDFs to get through before a deadline. Did them all in 10 minutes flat. Used to take half a day with desktop software.
"Layout came out perfect."
I ran a 60-page portfolio through it. Fonts, columns, page numbers — all intact. Opened the result on my iPad and it was pixel-perfect.
Questions about annotating PDFs.
Don't see your question? Our team replies within 2 hours.
chat Chat with supportStop printing PDFs to highlight.
Highlight it in 5 seconds.
Research, contracts, study guides — highlighted, sticky-noted and drawn-on in one place.
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