01
Image Compressor
Compresses images to a target quality or file size in your browser, with a live…
Signature Pad
Draw a signature with a mouse, finger or stylus and save it as a transparent PNG trimmed to the ink. Nothing is uploaded.
Image
Nothing uploaded
No sign-up
Free, unlimited
Sign in the panel above — the readout appears after your first stroke.
In short
A drawn signature is only useful as an image if it comes out with a transparent background and trimmed to the ink, because the two things you do with it — drop it into a PDF and paste it into a document — both put it on top of something else. A white rectangle around it gives the job away. The other thing that separates a usable pad from an unusable one is smoothing: joining raw pointer samples with straight lines produces a jagged line at any speed above a slow crawl, so the curve has to be drawn through the midpoints of consecutive samples. This pad does both, varies the line width with stylus pressure where the device reports it, and never sends the strokes anywhere — they exist in the browser tab and are gone when you close it.
How to use the Signature Pad
- Choose a pen width and ink colour.
- Sign inside the panel with a mouse, a finger or a stylus.
- Use Undo to remove the last stroke if you need another go.
- Press Download PNG — the file is trimmed to your ink with a transparent background.
About the Signature Pad
The Signature Pad draw a signature with a mouse, finger or stylus and save it as a transparent PNG trimmed to the ink. Nothing is uploaded. It runs as plain JavaScript inside the page, which means there is no upload step, no queue and no size limit imposed by a server — the only limit is your own device.
What people use it for
- Making a signature image to drop into a PDF or a contract.
- Adding a handwritten sign-off to an email footer.
- Signing a form on a tablet without printing it.
Details
| Output | PNG with a transparent background, trimmed to the ink |
|---|---|
| Smoothing | Quadratic curves through the midpoints of consecutive samples |
| Pressure | Read from the pointer event where a stylus reports it |
| Guide line | Drawn on screen only — it is never in the exported file |
| Privacy | The strokes stay in this tab; nothing is uploaded or stored |
The signing line is a screen aid. The export is redrawn from the stroke data rather than copied from the visible canvas, precisely so that the guide, and anything else drawn to help you aim, cannot end up in the file.
Where this tool stops
A mouse-drawn signature looks like a mouse-drawn signature. A trackpad is better and a stylus is much better; nothing in the smoothing can hide the input device.
Frequently asked questions
Is my signature uploaded anywhere?
No. The strokes are held as coordinates in this browser tab and drawn on a canvas; the PNG is encoded by your own browser and saved straight to your device. Watch the Network tab while you sign and you will see no request at all. Reloading or closing the page discards everything.
Why is the download smaller than the panel?
Because it is trimmed to the ink. The panel is a fixed 1200 × 400 drawing area; the export is the bounding box of what you actually drew, plus a little padding. Turn off "trim to the ink" if you want the whole panel.
Is a signature drawn here legally binding?
That depends entirely on your jurisdiction and on what you are signing, and an image of a signature is not the same thing as an electronic signature under a law such as eIDAS or the US ESIGN Act — those rely on the signing process and its audit trail, not the picture. For anything that matters, use a service built for it, or sign on paper.
My stylus pressure does nothing.
The pad varies the line width from <code>PointerEvent.pressure</code>, and a device that does not report pressure sends a constant 0.5, which is treated as "no pressure information" rather than as a real reading. A graphics tablet without its driver installed behaves like an ordinary mouse for exactly this reason.
Can I get an SVG instead?
Not from this tool. A vector export would carry the drawing order and the timing of every stroke, which is more information about how you sign than most people want to hand out in a file. The PNG is flat.
Is there a limit on how often I can use the Signature Pad?
It is free, with no account, no trial and no daily cap. Every image tool on inputtesthub.com works the same way: open the page and use it.
Does anything I enter leave my computer?
No. The Signature Pad runs entirely in your browser using JavaScript. Nothing is transmitted, logged or stored, which you can verify yourself in the Network tab of your browser's developer tools.
What do people use the Signature Pad for most?
The most common reasons people reach for it: making a signature image to drop into a PDF or a contract. Adding a handwritten sign-off to an email footer. Signing a form on a tablet without printing it. It is built for exactly those cases rather than being a general-purpose tool with this bolted on.
When is the Signature Pad not the right tool?
A mouse-drawn signature looks like a mouse-drawn signature. A trackpad is better and a stylus is much better; nothing in the smoothing can hide the input device. Knowing where a tool stops being trustworthy matters more than the cases where it works.
Which values should I know?
Output is PNG with a transparent background, trimmed to the ink. Smoothing is Quadratic curves through the midpoints of consecutive samples. Pressure is Read from the pointer event where a stylus reports it. These are printed on the page itself, so you do not have to take them on trust.
Why does the test start on its own?
No installation, no extension and no driver. The Signature Pad uses the browser's own device APIs and begins as soon as the page loads, so there is nothing to press first. Press Reset at any point to start over with a clean slate.
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