Write on any PDF — right in your browser

Writing on a PDF without a PDF editor

A PDF is not a word processor document, so "writing on" one does not mean editing the original text. It means drawing a new layer on top: a line of typed text in a blank field, a checkmark in a box, a highlight over a clause, a signature at the bottom. SignFit gives you that layer and then flattens it into the file, so the result opens the same way everywhere.

The whole process happens inside this browser tab. The PDF is read into memory on your own device, marked up locally, and written back out as a new file you download. There is no upload step and no server copy.

What you can add

• Text — type into any spot on the page, for names, dates and form fields.
• Checkmarks — tick boxes on forms without printing the page.
• Freehand drawing — write or annotate with the mouse, trackpad or a touchscreen.
• Highlights — draw attention to a passage.
• A signature — drawn, typed, or from an image.

Frequently asked questions

Can I edit the text that is already in the PDF?

No. SignFit adds a new layer on top of the page rather than rewriting the original text. That is what keeps the document's layout and fonts intact.

Is my document uploaded anywhere?

No. There is no server component — the file is opened, edited and saved entirely on your device.

Does it cost anything?

Writing on and signing a PDF is free, with no account.

Open the full SignFit editor · Edit a PDF · Step-by-step instructions