For questions, bug reports, or feature requests:
Email: info@cweird.com
On the website, Send feedback in the About tab opens a form for ideas, suggestions and bugs. In the iPhone app, “Found a bug? Report it” in the About tab opens an email. If you find a bug, let me know and send a screenshot if you can!
One person reads these. There is no set response time.
The website (foxgloveapp.com) runs Foxglove 1.2.0. The iPhone app on the App Store is version 1.1.1, and it works differently in places; each answer below says which one it describes. Anything marked Testing is new on the website and still being tested.
On the website: Foxglove rebuilds the file from its pixels, so location, serial numbers, hidden thumbnails and edit history are gone. It then writes the name you enter, a copyright line, your terms and a machine-readable “do not train” statement into the standard EXIF and XMP fields, and keeps the capture date and camera model when the original file has them, unless you turn that off. The website’s hidden message is paused: it used Foxglove’s own format, which only Foxglove could read, and social media uploads might erase it; pictures saved earlier with one can still be checked in the Inspect tab. If you turn on the visible signature Testing, it draws your name or your logo into the picture. The website adds no noise pattern to the pixels.
In the iPhone app (1.1.1): Foxglove strips the original file’s metadata (EXIF, GPS location and camera data), hides a message in the pixels (with your name, if you add it) when the image can carry it, and adds a faint noise pattern to the pixels if Perturbation is on (it is on by default). Save also writes the message and your name into the saved PNG’s description field as plain text. You can also add your own signature or logo image as a visible watermark.
Yes, on the website and in the iPhone app. Foxglove never uploads your images; they leave your device only when you share or send them yourself, including screenshots you attach to feedback. On the website, the Docs tab Testing works in your browser the same way: your text or PDF is not uploaded.
What the website does send: the optional email sign-up goes through FormSubmit.co to the info@cweird.com inbox and is added to c.weird’s email list; the feedback form sends your message, your email if you add it, any screenshots, the app version and your browser details through FormSubmit.co to info@cweird.com; and Vercel Web Analytics counts page views, sign-ups and App Store button taps. The iPhone app hides the sign-up form, has no feedback form and has no analytics.
That’s expected, on the website and in the iPhone app: Foxglove isn’t built to stop a chatbot from describing an image. Pasting an image into a chatbot shows what a model sees now, not what a future model is trained on. On the website, the visible signature Testing puts your name into the picture itself, and the “do not train” statement is a record inside the file. As of October 15, 2026, no AI company had published that it reads that field.
The visible signature Testing (website) and the watermark (iPhone app) are part of the picture, so they go wherever those pixels go; cropping or painting over that area removes them. The iPhone app’s hidden message might not survive social media uploads, so keep the PNG it saves. On the website the hidden message is paused.
On the website, the name, rights and “do not train” record lives in the file’s metadata. In IPTC’s 2019 test, Facebook removed all XMP and kept a few creator and copyright fields in EXIF and IPTC; in a July 2026 test, the copy X served had no EXIF or XMP at all. A platform’s copy may not carry the record, so keep your original file. PNG is the default; you can also save JPEG and WebP copies Testing (WebP where the browser can save it), each with the record and its own receipt. The iPhone app saves PNG only.
On the website, the Inspect tab Testing opens any image and shows what its metadata carries (creator, rights, “do not train”, note, camera, date), its fingerprint, any hidden message it can read from the pixels, and whether the file matches a receipt you paste. It does not detect the visible signature. In the iPhone app, the Verify tab reads back the hidden message if it can find one.
In the iPhone app, tap Save to save them to Photos. On the website, tap Download. Where your device supports sharing, the Share button sends them to other apps.
It is on the website only. Paste text or choose a PDF, and Foxglove makes a PDF with made-up claims hidden in its text and one in small visible print, plus an answer key you keep. Before you get the PDF, Foxglove reads it back with a text extractor to check that the claims are in it. “Check a submission” looks for those claims in text you paste. A tool that reads the pages as images sees only the visible claim. It all runs in your browser, and the answer keys stay there.
Yes. Foxglove is currently free with no ads and no in-app purchases.
Read our full Privacy Policy and Terms of Use.