Is my PDF uploaded to a server?

No. Editing runs entirely in your browser using pdf-lib and pdfjs-dist. The file never leaves your device - you can verify this in the browser's network panel. The tool works offline once the page has loaded.

Can I add text, shapes, or a signature to a PDF?

Yes. The toolbar has tools for text boxes, freehand drawing (useful for a quick signature or markup), rectangles, ellipses, lines, and image stamps. Select any annotation afterward to move, resize, or delete it.

Can I reorder, delete, or rotate pages?

Yes. Drag thumbnails in the sidebar to reorder pages, use the rotate buttons for 90-degree steps, and delete pages you don't need. You can also insert a blank page or copy pages in from a second PDF at any position.

Can I fill out a PDF form?

If the PDF has fillable AcroForm fields, they're detected automatically and shown in a form panel below the editor. Fill them in and they're flattened into the page when you download, so the values display correctly in any viewer.

Can I add a watermark to every page?

Yes. Open the Watermark panel, enter your text, and adjust size, rotation, color, and opacity. It's stamped onto every page in the document when you download.

What about password-protected PDFs?

The tool attempts to ignore encryption flags when reading; in most cases password-protected PDFs that you can already open in a viewer will load fine. Strongly-encrypted PDFs may fail to parse - in that case, unlock the PDF first with the original password.

Does it work on iPhone, iPad, or Android?

Yes. The interface is touch-friendly - drag to reorder pages, tap to place annotations, and drag to draw or resize. Any modern mobile browser (Safari 16.4+, Chrome on Android) is supported.

Subformer

PDF Editor

Reorder, rotate, insert, and annotate PDF pages, then fill in any form fields - all in your browser. Your file never leaves your device.

Files never leave your browser. All processing runs on your device.

Drop a PDF here, or click to browse

Reorder, rotate, insert, and annotate pages, then download.

How it works

From a raw PDF to a fully edited one, without leaving the tab.

1. Drop your PDF
Drag a PDF onto the page or click the drop zone. Pages render as a thumbnail sidebar as soon as the file loads.
2. Edit and annotate
Reorder, rotate, delete, or insert pages in the sidebar. Use the toolbar to add text, drawings, shapes, stamps, and a watermark directly on the page, and fill any detected form fields.
3. Download
Click Download PDF. Everything - page order, annotations, form values, watermark - is assembled and saved locally.

What can you do with it?

Most PDF edits don't need a desktop app - they just need the page reordered, a stray page removed, a note added, or a form filled in before you send it back. This tool covers that without an account, a watermark you didn't ask for, or a file leaving your machine.

Page management covers reordering by drag, deleting, rotating, inserting blank pages, copying pages in from a second PDF, and extracting any page back out as its own file. Annotations cover text boxes, freehand drawing, rectangles, ellipses, lines, image stamps, and a repeating watermark. If the PDF has fillable form fields, they're detected automatically and shown in a panel so you can fill them without hunting for the right click target.

Editing never touches the source file until you click download - undo by starting over, experiment freely, and the original stays intact on disk the whole time.

Under the hood

No account, no watermark added by us, no file upload. Every step below runs inside your tab.

pdf-lib document assembly: Pages, rotations, annotations, and filled form fields are assembled into the output PDF locally. Copied page content streams are preserved untouched - only what you add or change is new.
In-browser PDF rendering: Thumbnails and the full-resolution edit view are rendered locally purely for preview. Nothing is sent anywhere to produce them.
Canvas 2D & Pointer Events: Drawing, dragging, and resizing annotations happens on an HTML canvas overlay synced to the page's real coordinate space, so what you place lines up exactly in the final file.
No server, no upload: The page is static. Once loaded you can disconnect from the internet and it still edits and downloads - open your network panel and you will see zero requests carrying your file.

PDF Editor

How it works

1. Drop your PDF

2. Edit and annotate

3. Download