Drop files here
About Sign PDF — Free Online Tool
Sign PDF puts your signature on a page — either an image of it you upload, or your name typed and set in an italic serif.
The signature is drawn into the page at the coordinates you give, on the last page unless you name another, with an optional dated line beneath it; an uploaded PNG keeps its transparency, so a signature scanned on white paper is worth cutting out first. The point to be clear about is what this is not. It is a visible mark on a page, not a cryptographic digital signature: no certificate is involved, nothing is certified, and a reader cannot tell from the file who placed the mark or whether the document was altered after it went on.
The signature image and the document are both handled in the browser. A specimen of your signature is the last thing you would want copied to a server, and it is not.
Returning a signed rental agreement without a printer, approving a timesheet or an expense claim, initialling a quotation, and completing an NDA that arrived as a PDF.
Also known as: electronic signature · esign document · add signature to pdf · sign pdf (e-signature)
When to use it
Returns a signed rental agreement, timesheet or NDA without a printer and a scanner in between.
How it works
Places the image or the text at the coordinates you give, on the last page unless you name another, with the date beneath it if you ask for one.
What This Signature Is, and Is Not
It is a visible mark painted into the page. It is not a cryptographic digital signature: no certificate is involved, nothing certifies the document, and a reader cannot tell from the file who placed the mark or whether the pages changed afterwards. Whether a signed document binds anyone depends on the parties and the law where they are, not on this tool.
How to Use Sign PDF in 4 Easy Steps
Follow this simple guide to process your files in seconds directly inside your browser tab.
Select or Drop Your PDF/PNG/JPG
Drag and drop your PDF/PNG/JPG directly into the Sign PDF workspace above or click 'Choose files'. You can process up to 2 files in a single run.
Configure Your Preferences
Adjust the available optimization sliders, target formats, or custom options. Returns a signed rental agreement, timesheet or NDA without a printer and a scanner in between.
Instant In-Browser Execution
The client-side engine executes Sign PDF locally on your device hardware with zero server latency and 100% private in-memory sandboxing.
Preview & Download PDF
Inspect the processed file, compare file size savings or output quality, and click Download to save the finished PDF file directly to your disk.
Why Use Sign PDF on ShortTrick
Engineered for maximum speed, strict privacy, and frictionless digital productivity.
100% Private & Local
Files processed with Sign PDF never leave your computer or phone. Zero cloud uploads, zero tracking, and zero risk.
Blazing Fast Engine
Powered by compiled WebAssembly code running directly in your browser with sub-second execution for Sign PDF.
No Paywall or Account Required
Sign PDF is completely free with no hidden charges, watermarks, email signups, or artificial daily limits.
High-Fidelity Quality
Advanced algorithms preserve crisp vector text, clear colors, and structural layout integrity.
Generous 50 MB Size Limit
Handle files up to 50 MB and process up to 2 files in convenient batches with Sign PDF.
Cross-Device Compatibility
Runs seamlessly in modern browsers on Windows, macOS, Linux, iOS (iPhone/iPad), and Android.
Supported Formats & Limits
Designed for high performance with browser-side memory guarantees.
50 MB
2
Frequently Asked Questions About Sign PDF
Common questions regarding Sign PDF, data privacy, file format compatibility, and usage limits.
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