The short answer is "usually, but it depends" — which isn't satisfying, but it's honest. Most countries have some form of e-signature law, and most everyday business documents are covered. The exceptions are worth knowing before you rely on one.
Most jurisdictions recognize e-signatures broadly
Many countries have legislation (often modeled on international frameworks like UNCITRAL's model law) that gives electronic signatures the same legal weight as a handwritten one for most everyday contracts and business documents.
Where it gets more specific: certain document types
Wills, some real estate transfers, certain court filings, and specific government forms often still require a wet-ink signature, a notarized signature, or a specific type of certified digital signature — a simple drawn or typed signature image isn't always enough for these.
Simple vs advanced/qualified digital signatures
A drawn or typed signature (what a tool like this creates) is generally a "simple" electronic signature. Some legal frameworks distinguish this from "advanced" or "qualified" digital signatures, which involve cryptographic verification and identity checks — required for certain higher-stakes documents in some jurisdictions.
What generally matters most in practice
For everyday use — signing an invoice, an internal form, a simple agreement — intent and consistency (using the same signature reliably) tend to matter more than the exact technical method. For anything higher stakes, check first rather than assume.