Yes. Signatures export as a PNG with transparency so they layer neatly over documents.
Yes. Signature Generator is completely free with no sign-up, no watermarks and no usage limits.
No. Signature Generator runs entirely in your browser, so your data never leaves your device.
Only your device's available memory — there are no server-side limits because nothing is uploaded.
Draw or type your signature, then download it as a transparent PNG to use anywhere.