Edit, sign and fill a PDF without uploading it
Open a PDF to start editing
or drop one anywhere on this panel. Each opens in its own tab.
How it works
1. Open a PDF
Drop it on the page or use the button. It opens in its own tab, so a second file never disturbs the first.
2. Mark it up, move its pages
Draw text, highlights, shapes or a signature on top of the page. Delete, rotate, reorder or insert pages around what was already there.
3. Save the result
The edited PDF is built and handed straight back as a download. Nothing is kept anywhere else, and nothing was sent anywhere to make it.
What editing means here
A PDF stores its content as positioned drawing instructions. A paragraph typed on page four sits at a fixed spot on that page, the way ink sits on paper, and a text editor's idea of reflowing it does not apply. Two things follow, and both are stated plainly here rather than left as a surprise once you have already dropped a file. You can draw on top of a page and rearrange the pages themselves. And you can change a line the page already draws: click it, retype it, and the page's own instructions are rewritten. What that cannot do is reflow a paragraph around the change, because there is no paragraph in the file to reflow, only lines, each at its own fixed place.
Text, highlights and shapes
The text tool drops a text box wherever you click, or drags one out to the width you want; text wraps inside it, and two side handles pull it wider or narrower afterwards. Twelve typefaces are offered, three of them built into every PDF reader and the rest carried inside the file you save, and the editor says while you are typing if the one you chose has no glyph for a character. The highlight tool draws a translucent band over a line, the way a highlighter would on paper. Rectangle and ellipse draw an outline by default, filled if you ask, sized by dragging a corner; a line or an arrow connects two points directly, keeping its own direction rather than always running from one fixed corner to another. The link tool marks a region that opens an address, and only an ordinary web or mail address: a link that would run code or reach into the reader's own disk is refused rather than written. Every one of these is a real object once placed: click it with the select tool to move it, drag a handle to resize it, or press Delete to remove it. None of it touches the page underneath, which is why an annotation placed here can always be moved or deleted again without leaving a mark on the content it was drawn over.
Freehand and stamps
The draw tool follows the pointer as a freehand stroke, for a circled paragraph or a handwritten note in the margin. The stamp tool places an image you choose from your own device (a signature, a company seal, a scanned initial), sized and positioned the same way a shape is. Both land on the page exactly where the pointer was, at whatever size you drag out, and both can be moved or removed afterwards like any other annotation.
Page operations
Delete a page, rotate one in 90-degree steps, or drag it into a new position in the thumbnail rail down the side. Insert a blank page before or after any existing one, or duplicate a page to build a repeated form or a cover template. Every operation acts on the page order and rotation you end up with; nothing is written until you save, and a page you delete by mistake is still there until that point.
Filling a form
A PDF built with the standard's own AcroForm fields (the kind most form-creation tools produce, where each box is a real, named field rather than a drawn line) reads its existing fields straight from the document. Type into one and the value is written back into that field when you save. No new field types are invented, and a form built with a newer, more flexible field system (XFA) than a plain AcroForm is not read yet, since reading it needs a different parser than this build carries.
Why nothing is uploaded
This page is served with a Content-Security-Policy that sets connect-srcto none. That is not a line in a privacy policy; it is an instruction to your own browser to refuse this page a network connection at all, for as long as the tab stays open. A contract, a passport scan or a signed form is exactly the kind of PDF people most often need to mark up or reorder, and exactly the kind that should not have to leave the machine it is already on to do it.
How to check it in a minute
Open your browser's developer tools, go to the network panel, and open a file here. Draw on it, reorder a page, save the result: nothing appears in that panel. Or switch the network off after the page has loaded and keep working; it still works, because there was never anything on the other end for it to depend on.
What is kept, and what is not
Everything you draw, move or delete stays in this tab's memory until you download the result. Closing the tab, reloading the page, or losing power part-way through leaves the original file untouched and the edits gone with it, which is also why a tab carrying unsaved changes asks before it lets you close it.
Questions
Is the PDF I open here uploaded anywhere?
No. This page is served with a Content-Security-Policy that sets connect-src to none, so the browser itself refuses it a network connection. Open your developer tools, watch the network panel while you mark up a page, and nothing appears there. Every edit stays in this tab until you download the result.
What does "editing" a PDF mean here?
Three things. Marking it up: a text box, a highlight, a shape, a link or a signature drawn on top of the page. Rearranging it: delete, rotate, reorder or insert pages around the content that was already there. And changing what the page itself draws: click a line of its own text, retype it, and the page's drawing instructions are rewritten, with the editor saying first whether the page's font can spell what you typed. What none of that does is reflow a paragraph around an edit, because a PDF holds no paragraph to reflow. It stores positioned lines, each at its own fixed place, which is why a longer replacement runs on rather than pushing the next line down.
Can I redact something in this PDF?
Not yet, and it is left out on purpose rather than shipped as a black box drawn over the page. A rectangle painted on top of a line of text still leaves that text sitting underneath it, selectable and copyable by anyone who opens the file in a different reader. A cover that only looks like redaction is worse than none at all on a tool whose whole claim is that it can be checked. Real redaction needs the underlying content stream rewritten, which the libraries this build uses do not expose a way to do. This is revisited if that becomes possible without pulling in a dependency whose licence does not fit this repository.
What page operations does it support?
Delete a page, rotate one in 90-degree steps, drag pages into a new order, insert a blank page at a chosen position, and copy specific pages in from a second PDF. Every operation works on the page order and rotation you end up with; nothing is applied until you save.
Can I fill in a PDF form?
Yes, for a form built with the PDF standard's own AcroForm fields: the kind produced by most form-creation tools, where each box is a real, named field rather than a drawn line. The existing fields are read from the document and the values you type are written back into them; no new field types are created.
Can I have more than one PDF open at once?
Yes. Each file you open gets its own tab, with its own unsaved-changes marker, and the toolbar and page list always act on whichever tab is active. Closing a tab with edits still in it asks first, the same way a document editor would before discarding work nobody has saved.
Is there a limit on file size or page count?
Only your device. Nothing is uploaded, so there is no server-side cap, but the whole document and every edit made to it are held in memory. A very large PDF, or a great many annotations on one, will slow the tab down before anything here refuses it outright.
What happens to my edits if I close the tab without saving?
They are gone. Nothing here is written anywhere until you press save, so closing the tab, reloading the page or losing power part-way through leaves the original file untouched and the edits with it. That is also why a tab carrying unsaved changes asks before it lets you close it.
Convert something to a PDF first
Nothing to mark up yet? The converter turns pictures, Markdown, HTML, CSV, Word, Excel and EPUB files into a PDF before this page ever needs to open one.