Privacy
OpenZPL never stores the labels of paid plans or API keys. Free renders may be sampled for up to 24 hours to find rendering bugs, and then they are deleted.
Last updated: 8 November 2026. OpenZPL is made by The 01 Company. Questions: hola@loualcala.com.
The labels you render
| How you render | What is kept | For how long |
|---|---|---|
| Paid plan, on the site or with a key | Nothing of the label | — |
| A free API key | Nothing of the label | — |
| A print job sent to the print agent | The label, until the agent reports the result | One day at most if it's never picked up |
| Without a paid plan or a key | The ZPL of failed renders and about one in ten of the others | 24 hours, then deleted automatically |
A label can hold names and addresses, so samples live only in temporary storage, outside the database and its backups. We use them only to find and fix rendering bugs. They are never sold, shared or used to train AI models.
We also count which ZPL commands get used and which errors come back, per day. Those counters hold command names and error types only, nothing from your label, and we keep them.
Several tools run entirely in your browser and send us nothing: reading a PDF or an image for PDF to ZPL and Image to ZPL, and the spreadsheet in Excel to ZPL. If you press "Doesn't look right?" you choose to send us that label, and it stays until the report is closed.
Your account
With an account we keep your email, your workspaces, your saved labels and designs, your API keys (only a hash of the secret), your usage counts and 30 days of request logs without label content, until you ask us to delete them.
Technical data
To apply limits and prevent abuse we use your IP address. Daily limits are held in memory, and web server logs are kept for about 14 days. Your country, read from your IP address with DB-IP, sets the price you see.
Other companies involved
- Stripe takes card payments; we never see your card number.
- Mailgun sends our email.
- If you install our Shopify app, it reads the orders you ask it to print to build their labels. We keep the store's address and plan, not the orders or your customers' details.
- Google Analytics measures visits to the site, and Google handles Google sign-in if you use it.
Your choices
To see, correct or delete your data, write to hola@loualcala.com. To keep your labels out of the samples altogether, use an API key or a paid plan.