Edit PDF

PDFs are usually treated as a finished, uneditable format — but forms need filling in, contracts need a signature, and reports sometimes need a quick correction after export. Edit PDF was built to handle exactly that, letting you add text, shapes, images and signatures directly on top of your document, entirely inside your browser.

What is Edit PDF?

Edit PDF is a tool that lets you add new content on top of an existing PDF — text boxes, highlights, shapes, images, sticky notes, signatures, watermarks and page numbers — without needing the original source file the PDF was created from.

You upload a file, use the tool rail to place elements on any page, adjust each one from the properties panel, and download the result. The pages, layout and existing text of your original PDF stay exactly where they were; your edits simply sit on top.

Everything runs directly in your browser using pdf.js to render your pages and a canvas editor to place your additions, so there is no upload to a server, no waiting on a queue, and nothing left behind once you close the tab.

When should you use it?

This tool is useful any time you need to add something to a PDF you did not create in editable form, or no longer have the source file for.

• Signing a contract, agreement or form without printing and scanning it.
• Filling in labels, dates or short notes on a scanned document.
• Marking up a report with highlights, sticky notes or callout shapes.
• Stamping a document with a watermark like "Draft" or "Confidential".
• Adding page numbers to a PDF that does not already have them.

The benefits

Editing a PDF used to mean opening heavyweight desktop software or printing and re-scanning. A browser-based editor keeps it far simpler:

• Add text, shapes, images and signatures without installing anything.
• Undo and redo any change, so you can experiment freely.
• Nothing leaves your device, so sensitive or confidential PDFs stay private throughout.
• Completely free, with no watermark added to your output file.
• Works the same on a laptop, tablet or phone browser.

How the editing works

Each page of your PDF is rendered onto a canvas, and every element you add — a text box, a shape, an image, a signature — sits on an editable layer above it. You can move, resize, rotate, recolor and restyle each element at any time before exporting. When you download, the tool combines your original page content with a flattened image of your additions, so the final PDF keeps its original text and layout intact while showing your edits exactly where you placed them.

Common mistakes to avoid

A few things to keep in mind while editing:

• Forgetting to switch back to the Select tool before trying to move an existing element.
• Placing a watermark or signature too close to the page edge, where it may get clipped when printed.
• Closing the tab before downloading — since nothing is uploaded, your edits only exist in that browser tab until exported.
• Adding a signature image with a busy background instead of a transparent or white one.

Tips for best results

A few small habits make the whole process smoother:

• Use Fit Width or Fit Page to line up your edits accurately before placing them.
• Save a signature once, then reuse it from the Saved tab on every future document.
• Use the properties panel to nudge opacity down on watermarks so the original text stays readable.
• Download a copy as soon as you are happy with the result — your edits live only in the current tab until then.