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ShadoApps

Clear requirements, interactive prototypes, and technical representation — plus tools we build ourselves.

Support links

  • About
  • Privacy policy
  • Terms of service
  • Refund policy
  • Contact

Find us

© 2026 ShadoApps. All rights reserved.
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Back to all tools

documents

PDF Signer

Draw your signature or upload an image, then drop it onto any PDF. Everything happens in your browser — your files never leave your device.

Price

Free

Runs offline · No account needed

Download — Free

A small ZIP (~0.6 MB). Unzip it and open index.html in your browser — the tool runs entirely offline and nothing is ever uploaded.

About this tool

A simple tool for adding a visual signature to PDF files: open the file, draw your signature with your finger or mouse (or upload it as an image), drag it to the right spot on the page, then save the signed copy. The tool runs entirely in your browser, offline. The PDF is opened and processed locally — it is never uploaded to any server, ours or anyone else's. Important: this tool adds a **visual** signature (an image of your signature) to a PDF. It is not a cryptographically secure, PKI-based e-signature (X.509) and is not a substitute for a regulated digital-signature service (DocuSign and the like). For legally enforceable signatures, use a licensed provider.

Screenshots

How it works

What is pdf-signer?

pdf-signer lets you place a signature, initials, or short text (like a date or a name) onto a PDF — right in your browser.

It is 100% offline: your file never leaves your device, nothing is uploaded, and the tool itself stores nothing. Close the tab and no trace remains.

1 · Open your PDF

Click “Open a PDF” and pick a file from your device. Every page is rendered so you can work on any of them.

2 · Add a signature

There are three ways to create a signature or element:

  • Draw it — click “Draw signature…”, sign with your mouse, finger, or pen, then “Use signature”.
  • Upload an image — a PNG with a transparent background works best.
  • Reuse a saved one — click “Save as PNG” to download your current signature, then upload that same file next time. This is how we avoid storing anything on your device.

3 · Add text (including Arabic)

Type a date or a name in the text box and click “Add text”. Arabic is shaped and ordered correctly (right-to-left), and mixed Arabic-and-numbers — like a date — is handled properly.

4 · Place, move, resize, delete

Once something is active you are in placing mode — click any page to drop it. Keep clicking to place it on several pages; press Esc to stop.

Drag an element to move it, use the corner handle to resize (it keeps its proportions), click to select, and press Delete — or the “Delete selected” button — to remove it. Add as many elements across as many pages as you like.

5 · Download the signed PDF

Click “Download signed PDF”. Everything you placed is flattened onto the pages and saved to your device as signed.pdf. Your original file is untouched.

Your privacy

No server, no internet, no account, no telemetry. Everything happens locally in your browser — your document and your signature stay on your device.

Good to know (limitations)

  • This is a visual signature — it places an image or text on the page. It is NOT a legal, cryptographic, or digital-certificate (PKI) e-signature, and makes no claim of legal validity.
  • You supply your own signature (drawn or uploaded); the tool does not generate one for you.
  • Because everything runs locally, very large PDFs may be slow or use a lot of memory in the browser.

Tags

  • #pdf
  • #signature
  • #offline
  • #in-browser

ShadoApps

Clear requirements, interactive prototypes, and technical representation — plus tools we build ourselves.

Support links

  • About
  • Privacy policy
  • Terms of service
  • Refund policy
  • Contact

Find us

© 2026 ShadoApps. All rights reserved.