How to Edit, Sign and Fill a PDF Online (Free, No Software)

By the DocEpic team · Updated 10 November 2026 · 3 min read

An offer letter to sign and send back, a government form to fill in, a correction to a date, page numbers before printing a project: most PDF jobs are small, and paying for Acrobat for them makes little sense. Each of these can be done in your browser in a couple of minutes. This guide shows which tool to use for each job and what to watch out for.

Add text, shapes and images to a PDF

Edit PDF lets you put new things on top of any page: text in Helvetica, Times or Courier, freehand drawing, rectangles, highlights, images such as a stamp or logo, and whiteout boxes.

What it doesn't do is change the words that are already in the PDF — PDFs don't store text in a way that can be retyped like a document. The trick is to cover the old text with a whiteout box and type the new text on top. For larger changes to the wording, convert the file with PDF to Word instead.

Sign a PDF

Sign PDF creates your signature and places it on the page.

1. Open Sign PDF and add the document.
2. Create your signature: draw it with your finger or mouse, type your name in a handwriting style, or upload a photo of your signature on white paper.
3. Place it on the page, drag it into position and resize it with the corner handle. Add today's date next to it if the document asks for one.
4. Download the signed PDF. The signature is flattened into the page so it can't simply be moved or deleted.

This is a visual electronic signature, the kind most offer letters, rental agreements and forms ask for. It is not a certificate-based digital signature (DSC), which some government and tax filings require.

Fill in a PDF form

Many official forms are fillable PDFs with boxes you can type into. PDF Form Fill shows the form's own fields over the page, so you type directly into them, tick checkboxes and choose options. When you are done, tick Flatten the form to turn your answers into normal page content, so they look the same in every viewer and can't be changed by accident. Signature fields are left alone — sign with Sign PDF afterwards.

If the form has no fields — it is just a scan of a paper form — use Edit PDF to type text where the blanks are.

Number the pages

Projects, theses and court documents often need page numbers. Add Page Numbers adds them in the style you choose — 1, Page 1, Page 1 of 10, 1 / 10 or your own text — at any corner or edge. Type 2- under Pages to number to skip a cover page, change the first number, and tick Facing pages for a document printed as a book, where numbers sit on the outer edges.

Stamp a watermark

To mark a copy as CONFIDENTIAL, DRAFT or SAMPLE, or to put your name across a document you share, use Add Watermark to PDF. Choose the text, font, colour, transparency and angle, place it once or repeat it across the whole page, and limit it to some pages if you like.

All five tools run in your browser: the PDF is never uploaded.

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