What we never collect: your labels' content
All label processing — rendering ZPL, generating PDF and PNG, converting PDFs and images to ZPL — runs locally in your browser. The ZPL code, the files you drop and the data inside them (names, addresses, tracking numbers) are not sent to our servers or to third parties.
That's not a policy promise, it's the product's architecture: there is no label-upload endpoint. You can confirm it by opening your browser's Network tab before you drop a file — no request carries the label's content.
What gets saved: nothing, unless you ask
The converter does not keep your last label, uses no local database and leaves no copy of the file in the browser. Reload the page and you are back at the empty intake screen.
The one exception is the “Copy link” button, and it only acts when you click it: the ZPL is compressed into the URL fragment (the part after #). Browsers never send the fragment to the server, so only the people you give the link to can read it — which also means sharing that link shares the whole label.
What we collect: anonymous usage metrics
We use PostHog to understand how the product is used and improve it. We collect page views and product events — for example “downloaded a PDF”, “dropped an image file”, “printed” — with technical metadata such as the chosen density, the file type and how many labels were in the batch. Never the content.
Autocapture of clicks and forms, and session recording, are disabled. Label content cannot appear in any event by construction, and we build no user profile: there are no accounts to tie events to a person.
Analytics data is processed by PostHog in the United States — an international data transfer under the LGPD, limited to the metrics described above.
Infrastructure logs
Like any website, our hosting providers log accesses (IP address, user agent, URLs, timestamps) for a limited period, for security, abuse prevention and error diagnosis. These logs contain no label content.
What we don't do
- No signup — we don't collect names, emails or phone numbers to use the converter.
- We don't sell or share data with advertisers.
- No advertising or cross-site tracking cookies.
- We don't store your files — they never reach us.
Accounts and billing
An account is optional and does one thing: it holds the paid subscription. Convert on the free plan and none of it exists — no signup, no email.
For a subscriber we store two things: the email address and the state of the subscription (plan, status and renewal date). That is the whole list. Label contents still never leave the browser, and no account changes that — we keep no history of what was converted because we have no way to know.
Payment is processed by Stripe, which receives card details directly from your browser: they never pass through us and we never store them. Authentication and the subscription record live in Supabase, and hosting is on Vercel. All three act as data processors.
If you email us
Support goes through email (support@zplempdf.com). In that case we process what you send us — email address, name, billing details — only to reply, for as long as that and our tax obligations require.
You don't need to send labels to get support, and we'd rather you didn't: describe the problem, or send a screenshot with the recipient's details covered.
Your rights (LGPD)
The LGPD grants you rights such as confirmation of processing, access, correction and deletion of personal data. If you never created an account there is almost nothing to process: no label data reaches our systems. If you subscribe, the data is your email and the state of the subscription — and any request, including deleting the account, can be sent to support@zplempdf.com.
If anything material changes on this page, we'll update the date at the top and describe the change here.