There is no genuinely unlimited free e-sign tool. Every honest list ends in 'free up to a point'. The point is the question.
Here are the four free tiers worth knowing about, with their real limits.
Flint free
Free for light signing and editing. No watermark. Day pass available if you hit a heavier one-off task. Sign-pdf covers most personal-use cases.
DocuSign free
Limited to a small number of envelopes per month on the free plan. Strong audit trail. Best if you specifically need the DocuSign name on the certificate.
Smallpdf and Sejda
Both have free signing tiers with daily caps. Smallpdf caps at two free tasks per day on free; Sejda offers a more generous task allowance with file size limits.
Best for…
Flint for an occasional clean signing flow with edit options. DocuSign free for one-off audit-trail-heavy signing. Smallpdf/Sejda if you already use them.
FAQ
Is the signature legally valid on a free plan?
Yes — the law does not care which plan you used.
Does free mean watermarked?
Not in the tools listed here. Free tiers cap volume, not branding on the output.
When should I upgrade?
When you hit the cap more than once a month. A day pass or flat annual plan beats fighting the cap.
Free is great until it isn't. When that day comes, the day pass is usually the smartest next step — try Flint.