PDF Editor

PDFs are the default format for contracts, forms, reports, and scanned documents precisely because they look the same everywhere — which is exactly what makes editing one feel harder than editing a Word document. A PDF isn't really "text you can click into" the way a document is; it's closer to a printed page that happens to live in a file. Editing it well means understanding what you're actually doing to the page, not just dragging boxes around.

Adding text to an existing PDF

The most common edit is adding new text to a form or document that wasn't built with fillable fields. A good online editor lets you click anywhere on the page, type, and control the font size, color, and weight independently for every text box you add — because a single document often needs a bold heading in one spot and a small annotation in another. Under the hood, this text isn't inserted into the original PDF content stream; it's drawn as a new layer on top of the existing page at the exact coordinates you placed it, which is why precise positioning matters so much more in a PDF editor than in a word processor.

Whiting out and redacting old text

Sometimes the problem isn't missing text — it's text that needs to disappear. A whiteout tool works by drawing an opaque white rectangle directly over the existing content at that position, visually hiding what's underneath. It's important to understand the limits of this approach: a whiteout box covers text visually in the rendered page, but it does not remove the underlying text data from the file the way a true redaction tool does. If you're covering up something sensitive — a social security number, an account number, a name that must be legally removed — a cosmetic whiteout is not a substitute for proper redaction, since the original text can sometimes still be recovered by copying text out of the PDF or inspecting its raw content. Use whiteout for cleaning up typos, old dates, or outdated figures; use a dedicated redaction process for anything confidential.

Highlighting for review and feedback

Highlighting is the fastest way to flag something without changing the underlying content — a semi-transparent colored box laid over the text draws the eye without obscuring what's underneath. It's especially useful for contract review, where you want a counterparty to notice a specific clause, or for students annotating study material. Because the highlight sits on its own layer, it can be repositioned or deleted without affecting anything else on the page.

Signatures: drawn vs. typed

Most online PDF editors offer two ways to sign a document: drawing a signature with your mouse or finger, or typing your name in a script-style font. A drawn signature tends to look more natural and personal, while a typed signature is faster and more consistent across multiple documents. Both are typically converted into a small image and placed on the page like a stamp, which means you can resize and reposition a signature just like you would a logo — useful when the signature line on a scanned form isn't exactly where you'd expect.

Stamps, logos, and images

Beyond signatures, the same image-placement mechanism lets you drop in a company stamp, a "PAID" or "APPROVED" marker, or a logo on a cover page. Keep stamp images on a transparent background (PNG rather than JPG) so they blend naturally into the page instead of covering it with a visible white box.

Exporting a clean final PDF

When you're done editing, the export step flattens every annotation — text, whiteout, highlights, signatures, and images — onto the original PDF pages at their exact coordinates, producing a single clean file you can send, print, or archive. This is also the point where free-tier limits typically apply, since generating a full PDF export is the most resource-intensive step in the whole editing process.