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Sign PDF (Add Signature) - Vs Alternatives
Sign PDF (Add Signature) is one of three common ways to put a signature on a PDF: a browser tool like this, a desktop app, or an upload-based e-sign service. Each trades off where your files go and what you must install.
How Sign PDF (Add Signature) compares
| Option | Where your data goes |
|---|---|
| Sign PDF (Add Signature) (this tool) | Stays on this device - runs in the browser |
| Desktop PDF app | Stays on this device |
| Upload-based e-sign service | Sent to a server |
This tool places one uploaded signature image on one page at a fixed corner. A desktop app or e-sign service may offer freehand drawing, multi-party workflows, or cryptographic certification - at the cost of installing software or uploading the PDF.
The original files are not kept beyond the page session, and neither the PDF nor the signature image is uploaded for this tool.
Why trust these tools
- Ten-plus years of web tooling. The freetoolonline editorial team has shipped browser-based utilities since 2015. The goal has never changed: get you to a working output fast, without an install.
- No install, no sign-up. Open a tool and get a working output in seconds - nothing to download and no account to create. Tools that need heavy processing run it on our service, so even a low-powered machine gets the job done.
- Analytics stops at the page view. We measure which pages get visited, not what you type or upload inside a tool. There is nothing to sign in to and no profile is attached to your input.
- Open-source core components. The processing engines underneath (libheif, libde265, pdf-lib, terser, clean-css, ffmpeg.wasm, and others) are public and audit-able. We link to each one in its tool page's footer.
- Free, with or without ads. All tools are fully functional without sign-up. The Disable Ads button in the header is always available if you need a distraction-free run.