Combine several PDFs into one file, in the order you drop them in.
Cut a document into separate files, either one file per page or by a page range you type.
Select the pages you want and save just those as a new document.
Drag pages into the order you want and apply the new order to the file.
Turn one page or a whole selection left or right.
Remove pages you do not need, one at a time or as a selection.
Drop the pages of a second document in at the point you choose.

Make the file smaller before you send it, without uploading it anywhere first.
Turn a scanned page into text you can select and search, on your own machine.
OCR is built into the editor and runs on this computer, with no download. It reads English, Dutch, German, French, Spanish and Italian.
Produce the archival format that record-keeping rules ask for.
Check a document against the archival standard and see what it says, in the same window.
Open the export dialog from the toolbar, the command palette, or Ctrl+E.
Convert PDF to Word, Excel, PowerPoint, image, or PDF/A.
Tables may not keep their layout when exported to Word.

Pick a .p12 or .pfx file you already have and sign the document with it, on this machine.
The signature is an invisible PAdES signature without a timestamp.
See which signatures a document carries and whether they still hold.

Black out a passage so the words underneath are gone from the file, not covered up.
Set or remove a password and the permissions that travel with it.
Put a text watermark across every page.
Change the title, author and the rest of what a reader's PDF viewer shows in Properties.

Highlight a passage on a page. The highlight is saved into the PDF as a standard annotation, so other PDF readers show it too.
Freehand ink, straight onto the document.
Mark a passage the way you would on paper.
Add a comment as a sticky note to a page.
Carry a second file inside the PDF, and take it out again.
Put a stamp on a page, such as Approved or Draft.
Pull the fields out of an e-invoice and check them against the rules for one.

First page, last page, next, previous — by button, by arrow key, or by typing a page number.
Use the document's own bookmarks to move between chapters.
Find a phrase in the document you have open.
In, out, back to actual size, or fit to the width of the window.
Drop the interface and read the page on its own.
Have the page read to you by the voice your operating system already has.

Ctrl+K, then type the name of the thing you want; the shortcut sheet lists the rest.
Read, review, organise, convert, sign, forms and protect are separate rooms, and the number keys move between them.
Keep more than one document open, each in its own tab with its own undo history and its own unsaved changes. Opening a file that is already open brings its tab to the front.
Documents that are not on screen and have nothing unsaved are closed in the background to save memory. They open again from their file, on the page you left, when you select their tab.
There is a limit on how many documents can be open at once.
Step back out of anything you just did to the document.
Write the document back where it came from, or somewhere else.
Send the open document to a printer.

Click a line and rewrite it. Fix a typo in a contract or update a figure without exporting to another tool and back.
Text is edited one line at a time. A paragraph that runs over several lines cannot be edited yet.
While editing a line of text you can change its size and colour.
Changing the typeface of a line of text is not available yet; size and colour are.
Changing the typeface of a line is not available yet.
Add shapes such as rectangles and lines to a page.
Add an image to a page.
Moving or replacing an image that is already in the PDF is not available yet.
Moving or replacing an image that is already in the PDF is not available yet.

Type into the text fields of a standard PDF form (AcroForm) and save. The values are still there when the file is opened again.
Scripts inside a form, such as automatic calculations and validation, are not run.
Every standard form field type can be filled: checkboxes, radio buttons, drop-down lists and list boxes, as well as text fields.
The editor opens XFA forms (dynamic forms used by some tax, government and bank paperwork) that many PDF readers show as a blank page or an Adobe Reader notice.
Filling in XFA forms and saving them is being finished. Today XFA forms open for reading.
Scripts written in JavaScript run; scripts written in FormCalc do not, and the editor says so when a form has them.
Adding or removing repeating rows is not supported.
A form can carry scripts, such as calculations. They run only after you agree, for this document or always. Until then the form opens with its stored values and you can still fill it in.

Opening, editing, signing, converting, redacting and saving a document all happen on your computer. None of it makes a network connection, and the document itself never goes over the network.
When it starts, the editor checks whether a new version exists. That automatic check can be turned off in Settings; the Check for updates command still works by hand.
When a new version is available, the editor asks you first, then downloads the signed update and installs it.
Crash reports are off until you switch them on in Settings. A report contains the app version, the operating system, the interface language, what you typed and, for a crash, a cleaned-up stack trace, but never the document.
Help → Help us improve PDFluent sends a report only when you press Send. You see the system details first and can leave them out; the open document and your email address go along only if you choose.
The interface is available in 27 languages and starts in the language of your system.
The macOS app is one universal build that runs natively on Apple Silicon and Intel Macs, signed and notarised by Apple. There is also a Windows version.
The editor sets no page or file-size limit of its own. The PDF engine enforces safety limits against malicious files; those are listed on the security page.

The editor's code repository holds one file that lists every promise the editor makes, with the journeys it covers and the tests that prove it on macOS and Windows. The editor's build fails when a promised feature's test does not pass on either platform. Features that are in the app but whose tests are still being written are on a fixed list that can only get shorter.
This website reads a published copy of that file. The website's build fails if the copy was edited by hand or if a page states a feature the file does not contain.
Source: product/editor-features.json at commit b29ec72ae.
Free for everyone, including at work. No account, no upload, no time limit.