How to edit a PDF online
- Open a PDF with “Choose files” or drag it into the window.
- Pick a tool on the left — text, highlighter, signature, stamp — or open “All tools”.
- Click “Save”: the finished PDF with all changes is downloaded.
Why Construct PDF Online
- Files never leave your computerDocuments are opened and processed in your browser. Nothing is uploaded — safe for contracts and IDs.
- No sign-up, no watermarksOpen a file and start working. No file limits and no “made with …” marks on your pages.
- Cyrillic and LatinText and stamps support Cyrillic and Latin; forms are filled in; compression fits upload portals.
- Desktop app for WindowsConstruct PDF for Windows works offline: edit scanned text, CryptoPro e-signature, OCR.
More tools
Questions and answers
Is it free?
Yes. All tools are free, with no sign-up, no file limits and no watermarks.
Where are my files uploaded?
Nowhere. The file is opened and processed in your browser and is never sent to a server, so the editor is safe for contracts, IDs and other personal documents.
Can I change text in a PDF?
You can add text anywhere on a page, cover what you do not need and type over it. Full editing of existing text and scans is available in the Construct PDF desktop app for Windows.
Does it work on a phone?
Yes. Open the site in your phone browser to browse, rotate and delete pages, sign and save the PDF.
Like Construct PDF?
The service is free. Support the project or tell us what is missing — we read every message.