Sign PDF Online

A form needs a name, date or signature, and you do not want to install a desktop editor or send the document to a service. Add the information on the page, then review its position before saving. These are additions on top of the original page, not a rewrite of its underlying text.

Is this a certified digital signature?

This adds a signature image and does not create a cryptographic digital signature.

• Draw
• Type
• Upload
• Date
• Initials
• Drag your signature to move it. Drag a corner to resize it. You can place it on more than one page.

Before you start

Keep the original file. Work on an exported copy, especially with signed forms or important documents. Check that the file opens and that the pages you need are present. A password-protected PDF may ask for its existing password; that password is not stored.

Check the exported result

Open the downloaded file before sharing it. Check the page count, order, orientation and any small text. Look at the first and last pages as well as the page you edited. For an upload limit, check the actual saved file size rather than relying only on an estimate.

Scans, text and signatures

A scanned PDF is a collection of page images even when it looks like a normal document. Image conversion does not automatically recognize text. Search-based redaction needs selectable text; scan images require manual boxes. Editing a document may invalidate existing digital signatures.

Local processing and shared devices

Files, text, edits and results are processed on your device and kept only in the open page. They are not uploaded for processing. Reloading or closing the page clears the workspace. Files you download to your device remain there until you delete them.

Electronically Sign PDF documents securely. Draw your signature or upload an image to sign contracts and agreements without printing and scanning.

To secure the document further, use Watermark PDF.

Why use Skyron Tools?

• Privacy-First & Secure: All processing happens directly in your browser. We never upload your files to any server.
• Corporate Grade Security: Ideal for handling sensitive documents, contracts, and NDA-protected images. Since data never leaves your device, it is impossible for third parties to intercept it.
• No Limits: Convert as many files as you want, of any size (limited only by your device's RAM).
• Fast & Offline Capable: Works instantly without waiting for network uploads.

How it works

Unlike converters that upload files to a cloud server, Skyron Tools processes them directly in your browser using browser-native codecs, WebAssembly, or local JavaScript workers as appropriate.