Sign PDF

Signing a PDF without printing, scanning, and re-uploading used to require specialist software or a cloud service. This tool embeds a signature image directly into the PDF's content layer using pdf-lib, entirely in your browser. The result is a standard PDF with the signature visible on the chosen page — no metadata added, no cloud upload, no account required.

How to use

1. Open your PDF. Drag the file onto the drop zone or click to browse. The page count is shown so you can plan which page receives the signature.
2. Create your signature. Choose one of three modes:
   • Draw — use your mouse or finger to draw directly on the canvas. Change pen color if needed. Clear and redraw until you're happy.
   • Type — type your name and choose a handwriting-style font (Dancing Script, Caveat, or Great Vibes). Adjust font size and color. A live preview appears as you type.
   • Upload — upload a PNG signature image with a transparent background. The signature is placed exactly as-is, with transparency preserved on the PDF page.
3. Set page and position. Enter the page number where the signature should appear. Use the 9-position grid to place the signature at any corner, midpoint, or center of the page. The default is bottom-right, the standard signature position.
4. Adjust size. Use the scale slider to control what percentage of the page width the signature takes up. The default is 20%, which works well for most documents.
5. Add a date stamp (optional). Check the date stamp box to automatically add today's date below the signature. Choose from four date format options.
6. Apply and download. Click Apply Signature to embed the signature. A preview of the signed page appears. Download the resulting PDF with the original filename plus "-signed".

Tips for best results

• Draw on a trackpad or touchscreen for the most natural result. Drawing with a mouse produces angular strokes. A trackpad or touch input produces smoother, more natural-looking signatures.
• Use a PNG with transparent background for uploaded signatures. A signature image with a white background will appear as a white rectangle on the PDF page. Export your signature from any image editor as a PNG with alpha channel transparency for a clean result.
• Scale down for subtle placement, scale up for prominent signing. At 20%, the signature is discrete and professional. At 40–50%, it becomes a dominant visual element on the page.
• Bottom-right is the convention for single-signature documents. For multi-signature or multi-party documents, the center position is sometimes used to sign across the page. Use the position grid to match your document's convention.

Why use PixMidas

• 100% private. All PDF processing runs in your browser using pdf-lib. Your document is never uploaded to any server — critical for contracts, NDAs, legal forms, and confidential documents.
• Three signature modes. Draw, type in a handwriting font, or upload an existing signature image. The right mode depends on your device and preference.
• Any page, any position. Sign page 1, the last page, or any page in between. Place the signature in any of 9 positions with a single click.
• No account needed. Free, instant, no limits. Use it as many times as you need.

Frequently asked questions

Is an electronic signature created here legally valid?

It depends on jurisdiction and context. In the EU, a simple electronic signature (SES) is legally valid for most everyday documents under the eIDAS regulation. In the US, the ESIGN Act recognizes electronic signatures for most transactions. However, this tool does not provide identity verification, audit trails, or certificates — features required for advanced or qualified electronic signatures (AES/QES) used in regulated industries or high-value contracts. For documents where legal enforceability is critical, use a certified e-signature service (DocuSign, Adobe Sign, etc.) that provides an audited record of signing intent and identity.

How is this different from DocuSign or Adobe Sign?

Cloud-based signing services upload your document to their servers, which creates an audit trail but also means your file is transmitted and stored externally. This tool processes your PDF entirely in your browser — nothing is uploaded, no account is created, and no record of the signing is stored anywhere. The trade-off: no audit trail or signing certificate. For personal use, internal documents, and situations where privacy matters more than legal certification, the browser-based approach is preferable.

Can the signature be removed after it's applied?

Yes. The signature is embedded in the PDF's content stream, not in a locked or certified layer. Anyone with PDF editing software (Adobe Acrobat, Preview on Mac, etc.) can modify or remove it. If tamper-evidence is required, use a certified signing service that adds a cryptographic seal to the PDF.

Can I sign multiple pages?

Currently the tool applies a signature to one page per operation. To sign multiple pages, apply the signature to the first page, download the result, then open that PDF and apply to the next page. For repeated signing workflows, the process takes under a minute per page.

What PDF files work with this tool?

Any standard, unprotected PDF. Password-protected PDFs cannot be loaded — remove protection first. Very large PDFs (100MB+) may be slow on older hardware. PDFs created from scanned images (image-only PDFs) work fine; the signature is placed over the page image.

Why does my typed signature look different in the PDF than in the preview?

The preview uses the Google Font rendered in your browser. The PDF embeds a PNG screenshot of the text rendered at the selected size. If the font hasn't fully loaded from the Google Fonts CDN when you click Apply, the text may fall back to a different cursive font. Wait a moment after the page loads for the fonts to be available before applying.