Caspian Office

Edit PDF

Add text, rectangles, and highlights anywhere on a PDF.

Open Edit PDF →
Private · runs in your browserOffline · after first loadFree · no signup

What is the Edit PDF tool?

A simple PDF editor that lets you add text, rectangles and highlights anywhere on a PDF page. It runs entirely in your browser — your file is never uploaded — and it works offline after the first load.

How to use Edit PDF

  1. Open a PDF — Drag a PDF onto the drop zone or click to choose a file. Its pages are rendered ready to mark up.
  2. Pick a tool and colour — Choose Text, Rectangle or Highlight, then set the colour and, for text, the size from 12 to 40 points.
  3. Add your edits — Click on a page to place text, or drag to draw a rectangle or highlight. Use Select to click an existing item and press Delete to remove it.
  4. Save the edited PDF — When you are done, save the document — it downloads as a new PDF with your edits baked in, leaving the original file untouched.

Frequently asked questions

Is my PDF uploaded to a server?

No. The PDF is opened and edited entirely in your browser, so the file never leaves your device — it keeps working offline too.

What can I add to a page?

You can place text, draw filled rectangles, and add semi-transparent highlights, each in the colour you choose, anywhere on any page.

Can I undo a mistake or start over?

Yes. Use Undo (or Ctrl/Cmd + Z) to step back, Select then Delete to remove a single item, or Clear all to remove every edit at once.

Does saving change my original file?

No. The tool exports a separate edited copy with _edited added to the name, so your original PDF is left exactly as it was.

Can I use a rectangle to cover up content?

A solid rectangle draws over the area visually, but the text underneath still exists in the file. For removing sensitive content, use the Redact tool instead.

Tips

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