The job sounds trivial: put some words on a PDF. A date on a form, a label on a diagram, a note on a proof, your details on a document that was never built with fields. And yet the moment you need it, the usual answer is a subscription notice — Acrobat wants a monthly plan for the privilege of typing ten characters onto a page you already own.
The browser-based answer is Edit PDF: it places text boxes (and shapes) on top of your PDF, wherever you put them, with whatever the page needs. No subscription, no install — and no upload, because the whole thing runs on your machine.
Adding text vs editing text — which do you need?
The two get conflated constantly, and they're different jobs with different tools. Editing existing text means changing words that are already in the document — rewriting a sentence, fixing a paragraph. That's the structurally hard one, because PDFs store placed characters rather than flowing paragraphs, and it has its own guide: How to Edit Text in a PDF File.
Adding new text — this guide — means placing words on the page that weren't there before, without touching what's underneath. A date in the corner, a caption under an image, answers on a printed form. The original content stays exactly as it was; you're working above it, not inside it. If your problem is "I need to type onto this," you're in the right place.
How to add text to a PDF
- Open Edit PDF and drag in your file — up to 100 MB.
- Add a text box where the text belongs, and type into it.
- Adjust size and color until it matches the document.
- Download the updated PDF.
That's the whole flow. Text can be sized to match whatever's already on the page — small and unobtrusive for a date stamp, larger and bolder for a label — and colored to blend in or stand out as the job requires. Because the additions sit on top of the page, the tool works on any PDF: generated documents, scans of paperwork, drawings exported to PDF, flat forms. Nothing underneath is altered.
Typing onto a flat form
The flat form is the classic case. Someone exported a document to PDF — or scanned a paper form — and the blanks are just lines on a page: no fields, nothing to click. PDF Forms can't help here, because that tool only fills fields that already exist in the PDF. A flat form has none.
Text boxes are the workaround. Add one, type the answer, and position it over the blank; repeat for each field. Typed text on a form is neater than handwriting, survives scanning and forwarding perfectly, and lets you fix a mistake by retyping instead of starting over with white-out. It's more manual than a fillable form — you place each answer yourself — but for the forms that were never going to accept typing any other way, it turns an unfillable PDF into a completed one.
More than words: shapes, colors, and sizes
Text rarely travels alone. Rectangles can highlight a region or cover something outdated before the replacement text goes on top. Ellipses circle the part of a diagram or contract that matters. Lines point, underline, and divide. Each shape comes in your choice of color, and text and shapes both support adjustable size — so an annotation can whisper or shout depending on what the page needs.
For marking up a proof, signing off a checklist, or flagging a paragraph in a contract, the combination of text and shapes usually covers it: point at the thing, write what about it.
Text that repeats on every page
Some text doesn't belong in one place — it belongs on every page: a document title across the top, a classification notice across the bottom, page numbers throughout. Placing those by hand, one page at a time, is exactly the kind of tedium software should absorb.
For that pattern there's a dedicated tool. Add Header & Footer places a header at the top of every page, a footer at the bottom, or both — with page numbers appearing in the footer as Page X of N if you want them. You pick left, center, or right placement and a small, medium, or large font size, and the text is drawn on top of each page while the existing content stays exactly as it was. Reach for it whenever the adding is repetitive rather than positional.
Fixing placement — and moving between pages
Placement is iterative: you type, you look, you nudge. Nothing is locked once placed. Switch to the select tool, drag an element to reposition it, or select it and click Delete when it's simply wrong. For multi-page documents, the page selector moves you between pages, and each page keeps its own elements — your page-three notes don't drift onto page four.
The practical rhythm most people settle into: rough everything in first — all the text boxes and shapes, roughly where they belong — then go back and fine-tune positions with the select tool. It beats perfecting each element before starting the next.
When adding text isn't the right tool
Two cases point elsewhere. If the PDF actually has fillable fields — clicking a blank highlights it — use PDF Forms instead: filling real fields is faster and cleaner than placing text over them, and a signature can be added in the same flow. And if you find yourself adding paragraph after paragraph, the document has outgrown annotation: the honest move is the Word round trip or the original source, the territory covered in the editing guide. (Whether a document should be a PDF at all is its own question — see PDF vs DOCX.)
Between those edges, though, adding text is exactly the tool: a few words, placed precisely, on a document you otherwise don't touch — privately, in the browser, without Acrobat anywhere in sight.