Sign PDF

Draw, type or upload a signature and flatten it onto a PDF page, in your browser.

Runs in your browser. Nothing is uploaded — your input is processed on this device and discarded when you close the tab.

Your file

Drop a PDF here or click to browse. One PDF at a time, up to 50 MB. Everything is processed on this device only — no file is uploaded.

Your signature — use one source

Draw it

Clear drawing

Or type your name (drawn in Times-Italic, a PDF standard font)

Or upload a signature image (PNG with transparency preferred, JPEG accepted)

Placement

Page to sign

Position Bottom right Bottom left Bottom centre Centre Centre right Centre left Top right Top left Top centre Free x / y below

Signature width in points (image and drawn signatures)

Free position x in points from the left edge

Free position y in points from the bottom edge

Sign and download

This tool puts a signature onto a page of a PDF and flattens it into that page's content. You can draw the signature with your mouse or finger on the pad provided, type your name and have it rendered in an italic serif face, or upload a picture of your signature — and then place it at one of nine preset positions on the page, or at exact coordinates, at the width you choose. The finished PDF downloads with the signature as a permanent part of the page: it is drawn into the page's content stream, not attached as a movable note, so a later reader cannot lift it off or drag it elsewhere.

Two honest definitions before anything else. First, "flattened" here means exactly that permanence: the signature becomes page content like any printed ink. Second, this is a drawn signature, not a cryptographic digital signature. It carries no certificate, proves nothing about who placed it, and gives the document no tamper detection. Many everyday agreements — a delivery note, an internal approval, a club membership form — only ever need a signature that looks like yours on the page, and that is what this tool provides. A contract that legally requires a certified digital signature needs a dedicated signing service instead. Everything runs in your browser; the document is never uploaded.

How to use Sign PDF

1. Add your PDF. Drag the document into the dropzone, or click the dropzone to pick the file yourself — a single PDF of at most 50 MB. A file that is password-protected or damaged is named by the tool and refused: it cannot be signed here.
2. Make your signature, choosing one source. Draw it on the pad (choose Clear drawing to start again), type your name in the name field, or upload a signature image. If more than one source has content, the uploaded image is used first, then the drawing, then the typed name — clear the ones you do not want.
3. Choose the page. Enter the page number to sign, counting from 1. Signing stops with an explanation if that page does not exist — the signature is never quietly moved to a different page.
4. Choose the position. Pick one of the nine preset positions (the corners, edge centres and page centre of an imaginary grid) or choose Free and enter x and y coordinates in points from the bottom-left corner. Presets keep a 36 point (half-inch) margin from the paper edge.
5. Set the width. For a drawn or uploaded signature, set its width in points; its height follows from the image's own proportions, which are always preserved — a signature is never stretched. A typed signature is set at 32 points instead, and its width follows the lettering.
6. Sign and download. Choose Sign and download, then open the result and look at the signed page: the signature should sit where you expected, at the size you expected, with the rest of the page unchanged.

Features

• Three signature sources: a drawing pad, a typed name, and an uploaded PNG or JPEG image.
• Typed names are rendered in Times-Italic, one of the standard PDF fonts built into every reader — no font file is loaded or embedded, which is why the typed option offers that one face.
• Nine preset positions on a three-by-three grid, each holding a 36 point margin from the page edges, plus free x/y placement that is clamped so the signature always stays fully on the page.
• Aspect ratio is preserved exactly: the placed height is the chosen width divided by the signature's own width-to-height ratio, for every preset.
• The signature is flattened into the page content with the same drawing operation a printer driver uses — it cannot be selected, moved or deleted as an object in a reader.
• Page numbers are checked against the real page count; a signature aimed at a missing page is refused, and the document is returned unchanged.
• Images are checked by their actual contents: a file that is not really a PNG or JPEG is refused, whatever its name claims.
• The rest of the document is untouched — only the signed page gains content, and every other page is byte-for-byte the page it was.

Worked example

Take an A4 page (595 × 842 points) and a signature image 200 × 100 pixels — an aspect ratio of 2. Set the width to 180 points and choose Bottom right. The placed height is 180 ÷ 2 = 90 points; the right edge sits 36 points from the paper's right edge, so the signature's left edge is at 595 − 36 − 180 = 379 points, and its bottom edge is at 36 points. The result: a signature occupying the box from (379, 36) to (559, 126) points, which the tool reports back after signing. Rendered, the bottom-right of the page shows the signature's ink, and the top-left of the page is pixel-for-pixel what it was before signing. Prefer the typed route with the name "Ayesha Khan": it is drawn in Times-Italic at 32 points, so the placed signature is exactly 32 points tall and as wide as that lettering measures in the font. The tool's own test suite asserts both results, which keeps this walkthrough honest against the code it describes.

Common errors and limitations

• This is not a digital signature in the cryptographic sense: no certificate, no identity verification, no tamper evidence, and no signature panel entry in a reader. Do not use it where a certified digital signature is required.
• One signature, on one page, per run. Signing several pages means running the tool once per page, feeding each output in as the next input.
• One typeface for typed signatures: Times-Italic, a PDF standard font. It resembles a formal hand less than a real signature does; the drawing pad or an uploaded image looks more personal.
• A JPEG signature has a solid background (JPEG has no transparency), so it will cover whatever is beneath it with a rectangle. PNG with a transparent background avoids that.
• Flattening is permanent in the output file. Keep your unsigned original if you may need it — the tool never changes it, but the signed copy cannot be un-signed.
• Password-protected PDFs cannot be opened or signed here.
• Very wide signatures are refused rather than shrunk silently: at 36 point margins an A4 page fits at most 523 points of width.

• Signing the wrong page and not noticing. The signature is permanent in the output. Fix: check the page count, sign, then open the download and look at that exact page before sending it anywhere.
• Uploading a JPEG of a signature photographed on paper. The whole rectangle, paper colour and all, lands on the page. Fix: use a PNG with a transparent background, or draw the signature on the pad instead.
• Treating the result as a certified digital signature. It is a picture of a signature, placed permanently. Fix: where a contract, court or bank requires a cryptographic signature with a certificate, use a dedicated signing service — this tool does not provide one and does not claim to.
• Setting a width wider than the page allows. The tool refuses rather than clipping your signature in half. Fix: reduce the width below the page width minus 72 points of margin (523 points on A4).

Frequently asked questions

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Prefer everything on one page? The original PDF Toolkit merges, splits and rearranges with one shared file list. The full suite is indexed on the PDF Tools hub.

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