Terms of Use

Last updated: November 9, 2026.

These terms govern your use of Hermet at https://hermet.dev, provided by Hermet (“we”, “us”). By using Hermet you agree to them.

What Hermet does

Hermet is a set of developer tools — formatting, repairing and converting JSON, decoding tokens, encoding text, generating UUIDs and converting timestamps. Every tool runs entirely in your browser: your input is processed on your device and is never sent to us. Results are computed automatically from what you provide, so check them before you rely on them — generated types, for example, are inferred from your sample.

Your content

• You keep all rights to the content you paste into the tools. Because it never leaves your device, we never receive it, store it, or use it.
• Use Hermet only with content you have the right to use.
• Workspaces and settings are stored in your own browser. Clearing your browser’s site data deletes them, and we cannot recover them.

Plans and payment

The tools are free and need no account. Hermet Pro ($5 per month or $39 per year, in US dollars) adds batch processing, large-file mode, saved workspaces and the installable offline app. Pro renews automatically at the end of each period until you cancel. You can cancel at any time using the link in your payment receipt email; you keep Pro until the end of the period you have paid for, after which your account returns to the free tools. Sign-in and your plan record are handled by Supabase. Payments are handled by Paddle. If we change a price, we will tell you before the change applies to your next renewal. Refunds are described in our refund policy. Our payment provider, Paddle, is the seller of record: it processes your payment, adds any applicable taxes, and its buyer terms apply to your purchase. Features may change over time.

Acceptable use

Do not misuse the service, attempt to disrupt it, or use it to infringe anyone’s rights.

No warranty

Hermet is provided “as is” and “as available”, without warranties of any kind, to the extent the law allows. We do not guarantee that it will be error-free or that converted or generated output will always be correct.

Limitation of liability

To the extent the law allows, we are not liable for indirect or consequential losses, or for loss of data, arising from your use of Hermet.

Changes and termination

We may update these terms or the service from time to time. If you keep using Hermet after a change, you accept the new terms. We may suspend access to anyone who breaks these terms.

Contact

Hermet, P.O. Box 5023, Reno, NV 89503, USA. Email: [email protected].