# ZeroSSL — TLS certificate maximum validity by Certificate Authority: what each CA actually issues today

For ZeroSSL, profile or product is ACME/free; maximum validity (days) is 90; still issuing tls certificates is yes; notes is Free ACME-issued certificates are 90 days, renewable automatically with any major ACME client, recorded from its source on 2026-08-18.

- **Certificate Authority:** ZeroSSL _(verified: appears in the quote below)_
- **Profile or Product:** ACME/free _(our reading, not quoted from the source)_
- **Maximum validity (days):** 90 _(verified: appears in the quote below)_
- **Still issuing TLS certificates:** yes _(our reading, not quoted from the source)_
- **Notes:** Free ACME-issued certificates are 90 days, renewable automatically with any major ACME client. _(our reading, not quoted from the source)_

## What the source says

> ACME integrations let you order and renew 90-day certificates automatically and free of charge, using any major ACME client:

## Source

- https://zerossl.com/features/acme/

Last verified: 2026-08-18. Review by: 2026-09-17.
Part of [TLS certificate maximum validity by Certificate Authority: what each CA actually issues today](https://referencesource.org/ca-issuance-validity/).