Is this a digital certificate signature?

You get a visible signature on the page, the kind a reviewer sees when they open the file. The drawn, typed, or uploaded mark is rasterized and embedded with pdf-lib. A certificate or PKCS#7 digital signature is a different kind of signing. Use this page when the reader needs to see the mark, and keep the PDF in the browser while you place it.

How does a typed signature look?

Typed text is italic at 52 pixels. The font stack is Segoe Script, Snell Roundhand, Brush Script MT, then a cursive fallback, depending on what the browser can use. The words are turned into an image and embedded. You still choose the page and the position. The width is capped at about 200 points or 35 percent of the page, whichever is smaller.

Which page does the signature go on?

One page, using a 1-based number, so 1 is the first page of the PDF. A nine-box grid picks the position, such as a bottom corner or the center. If the mark shows up on the page before the signature line, change the number and download again. The output file is named with _signed before the extension.

How large can the PDF be?

The local path accepts files up to 100 MB, and the work stays in the browser. Draw, type, or upload the signature, place it, and download stem_signed.pdf. Open that download before you send it, and confirm the mark is visible at the size the width cap allowed.

Is adding a signature a separate tool?

No. Drawing, typing, or uploading a signature is this page. Typed text is italic at 52 pixels, using Segoe Script, Snell Roundhand, Brush Script MT, then a cursive fallback. You pick one page with a 1-based number and a place on a nine-box grid. The width stays within about 200 points or 35 percent of the page, whichever is smaller. The PDF stays in the browser up to 100 MB, and the download is named with _signed. The mark is visible on the page. It is not a certificate or a PKCS#7 signature.

Canonical Sign PDF Tool

Sign PDF: place a signature you can see

Q: Can I upload a picture of my signature?

Yes. An uploaded signature is rasterized and embedded the same way as a drawn one. A wide image is scaled so the width stays within about 200 points or 35 percent of the page, whichever is smaller. Use a clean crop of the mark so the extra paper around it is already gone. Then pick the grid cell a reviewer expects.

Q: Does the file leave my browser?

On this local path the PDF stays in the browser while the signature is embedded. The download is the signed copy, named with _signed. You get a visible signature on the page, the kind a reviewer sees when they open the file. Save that download if you need to send it, and keep the unsigned original if you might place the mark again.

Draw, type, or upload a signature and place it on one page. The mark stays in the browser and shows up when a reviewer opens the PDF.

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Written by Safaat Rahman Siham, Founder & Developer at Convertify4u. Contact us.

You need a signature a reviewer can see on the page when they open the PDF. Draw it, type it, or upload an image of it, choose the page and the position, and download a file named with _signed. The work stays in the browser on the local path, for PDFs up to 100 MB. The drawn, typed, or uploaded signature is rasterized and embedded with pdf-lib. You get a visible signature on the page, the kind a reviewer sees when they open the file. A certificate or a PKCS#7 digital signature is a different kind of signing, and this page places the mark you can see. Typed names use italic 52px type: Segoe Script, Snell Roundhand, Brush Script MT, then a cursive fallback. You pick one page with a 1-based number and a spot on a nine-box grid. The width is capped at about 200 points or 35 percent of the page, whichever is smaller. The download is the stem plus _signed.pdf.

A visible mark on one page, built in the browser

The signature is an image on the page. Draw, type, or upload it, choose where it sits, and download a PDF a reviewer can open.

Drawn, typed, or uploaded, then embedded

All three ways become a picture. pdf-lib embeds that picture on the page you chose. Typed text is italic at 52 pixels, using Segoe Script, Snell Roundhand, Brush Script MT, and a cursive fallback. An uploaded signature should already be a clean image of the mark, because it is placed as-is after it is rasterized.

One page and a nine-box grid

The page number is 1-based, so page 1 is the first page. The nine-box grid sets the corner or the center. The mark’s width stops at about 200 points or 35 percent of the page, whichever is smaller, so a large upload is scaled down to a signature rather than a banner. Place it where a reviewer expects to see it.

What the reviewer actually gets

They get a visible signature on the page, the kind a reviewer sees when they open the file. The output is named with _signed before the extension. The work stays in the browser on the local path, up to 100 MB. If a process asked for a certificate signature, this visible mark is the wrong artifact for that request.

How it works

1
Add the PDF
The file stays in the browser, up to 100 MB. Open a copy you are allowed to sign. The original on disk is untouched until you save the download.
2
Create the signature and choose its place
Draw, type, or upload the mark. Typed text is italic 52px in Segoe Script, Snell Roundhand, Brush Script MT, or cursive. Pick the 1-based page and a cell on the nine-box grid.
3
Download the _signed PDF
pdf-lib embeds the rasterized signature. The width stays within about 200 points or 35 percent of the page. Open the file and confirm the mark sits where a reviewer will look.

Use cases

A form that shows a signature line

Place a visible mark on that page so the reviewer sees it when they open the PDF.

Initials you would rather type

The italic script faces give a typed name a handwritten look, then the image is embedded on the page.

A signature you already saved as an image

Upload the image. It is rasterized, scaled to the width cap, and placed on the grid cell you pick.

Problems we solve

The process asked for a certificate signature

This page embeds a visible mark with pdf-lib. A PKCS#7 or certificate signature is a different kind of signing.

The mark landed on the wrong page

The page field is 1-based. Recount from the first page, pick the grid cell again, and download a fresh _signed file.

Related guide

Specialized Sign PDF guides

Trust & privacy

Local up to 100 MB

The PDF and the signature stay in the browser on the local path. The download is stem_signed.pdf.

A mark people can see

You get a visible signature on the page, the kind a reviewer sees when they open the file.