Adobe Acrobat Reader can sign PDFs. It nudges you fairly hard to sign in to Adobe and upsell features, but the basic flow works.
For people who do not want a Creative Cloud account just to sign a school form, here is the comparison.
Reader's signing flow
Open the PDF, switch to Fill & Sign, draw or type a signature, place it on the page, save. Reader will prompt you to sign in to Adobe to save your signature across sessions. That is the friction point most people hit.
Flint's signing flow
Drop the file into sign-pdf, draw or type a signature, place it, download. If you want to keep a signature for next time, signing in to Flint takes a moment — but you can do a one-off without an account.
When the difference matters
For one-off signing, both work. For repeat signing — say, weekly client contracts — the saved-signature behaviour matters. Flint's flow is faster and less account-led. Reader's is fine if you already live in Adobe.
Best for…
Reader if you already use Adobe and want the integration. Flint for everyone else, especially anyone signing PDFs across different devices or browsers.
FAQ
Are signatures from both legally valid?
Yes, in most jurisdictions for everyday contracts. For heavily regulated documents check local rules — qualified e-signatures are a separate category.
Can Reader sign without an Adobe account?
It can, but with friction. It keeps prompting for sign-in. Flint is more relaxed about anonymous one-off signing.
Which produces a smaller file?
Comparable. Both write standard PDF.
If signing is the only PDF job you do, skip the Adobe account and sign in Flint.