It looks really good. I have tried a PDF and asked for 4 keys and an object, and managed to extract them with high accuracy!

Feedback:

1. Entering fields manually can be hard for long documents; it would be great to upload a file, set boundaries (such as canvas) and define these boundaries.

2. You've mentioned you're GDPR compliant; with this kind of data extraction, you'd mostly want to go SOC2 in the future.

Do you offer a self-hosted version?