Nixt PDF
Read, fill in, mark up, edit text, redact, stamp and sign PDF documents on your own computer, without an account and without sending the file anywhere.
Nixt PDF opens, reads and changes PDF documents (.pdf) on the computer it runs on. You don’t need an account to open a file, nothing is synced, and the app sends no telemetry. The one feature that uses the network is a trusted timestamp on a digital signature, and only when you ask for one and name the server yourself.
Get Nixt PDF from the Download page.
What Nixt PDF is for
Nixt PDF is built for PDFs and opens nothing else. If you choose a Word document, a spreadsheet or a presentation, it tells you which Nixt Office app opens that file instead — Nixt Writer, Nixt Sheets or Nixt Slides.
It is designed around two ideas:
- What you change is added, not rewritten. Almost every edit is added to the end of the file as a new revision, and the rest of the document is left byte for byte as it was. That is what keeps an existing digital signature intact when you fill in a form or add a comment, and it is how Undo works: it takes the last revision off again.
- Some jobs must not leave the old version behind. Redaction, adding or removing a password, removing hidden content and reducing the file size rewrite the whole file, so nothing you removed survives in an earlier revision. These are the operations that can’t be undone.
What you can do
| Area | What’s available | Read more |
|---|---|---|
| Reading | Continuous, one-page and two-page layouts, turning the view, read mode, auto-scroll, page thumbnails, the document’s contents list, links, printed page numbers | Reading and navigating |
| Finding text | Find across the whole document with a match count; select, copy and act on text | Searching and selecting text |
| Document information | Properties, custom properties, fonts, XMP, how the document opens, layers, links, attached files, an accessibility check | Document information |
| Comments | Highlight, underline, strike through, squiggle, replace, sticky notes, freehand drawing, text boxes, callouts, insertion marks, rectangles, ovals, lines, arrows and clouds | Comments and markup |
| Review | Reply, accept, reject, mark completed, tick off, filter and sort comments; save them as text or as a summary PDF; compare two versions | Reviewing and comparing |
| Forms | Fill in text boxes, tick boxes, choices and lists; totals that work themselves out; save and load answers; flatten; turn a flat page into a form | Filling in forms |
| Editing text | Change the words already on a page, line by line or everywhere at once | Editing text |
| Pictures | Place PNG and JPEG pictures; move, resize, crop, replace and remove pictures; see how well each will print | Pictures on the page |
| Pages | Turn, add blank pages, duplicate, insert from another PDF, delete, reorder, crop, renumber, save a range as a new PDF | Organising pages |
| Page furniture | Watermarks, headers and footers, Bates numbers | Watermarks, headers and Bates numbers |
| Scans | Recognise the text in a scanned document; straighten, clean up and sharpen a scan | Scanned documents |
| Stamps | 29 ready-made stamps, stamps that fill in your name and the date, picture stamps, a full stamp designer, and stamp sets you can share with a team | Stamps, Designing stamps, Sharing stamp sets |
| Signing | Drawn, typed or photographed signatures and initials; signing and certifying with a digital ID; trusted timestamps | Signing, Digital IDs |
| Checking signatures | Whether a signed document has changed, whether the signature is genuine, and whether you trust the signer | Validating signatures |
| Redaction | Remove text for good, by area, by selection or everywhere a word appears, with an optional printed reason | Redaction |
| Protection | Open protected documents; add, change and remove passwords; see and remove hidden content | Passwords and security, Hidden content |
| Output | Print, save a copy, save the text, save as a web page, save pages as pictures, reduce the file size | Printing and export, Reducing file size |
Where to start
- Read Getting started to open a document, save your changes and close it again.
- Read The window for a tour of the ribbon, the tool strip, the side panel and the More menu.
- Keep Keyboard shortcuts and Troubleshooting to hand.
What stays on your computer
- The documents you open, and every change you make to them.
- Your saved signatures and initials, your own stamps, your details for stamps, and the certificates you have chosen to trust.
- The list of recently opened files.
A digital ID’s private key and its password are never stored. You choose the digital ID file each time you sign, and Nixt PDF forgets both when the signature is made. See Privacy and your data.
Related pages
- File formats — what Nixt PDF reads and writes, and what it keeps unchanged.
Something unclear or out of date on this page? Tell us.