Flatten PDF
Lock PDF form fields and annotations so they can no longer be edited.
Key Capabilities
Merges fields, annotations, and signatures into the page itself
After flattening there's nothing left to click or edit — what you see is what's baked into the content stream.
Visually identical, structurally different
The page looks the same; it just isn't interactive anymore.
Suitable for archival and court filing
A flattened PDF won't have its fields accidentally edited by whoever opens it next.
How to Use
Upload your filled PDF
Works on forms with AcroForm fields, annotations, or signatures.
Click Flatten
Every interactive element is merged into the page content.
Download
The output is visually identical but no longer editable.
Common Use Cases
- Locking a completed onboarding formFinalizing employee paperwork before it goes into an HR system.
- Finalizing a signed leaseLocking a lease agreement before sending it to a property registry.
Frequently Asked Questions
What does it mean to flatten a PDF?
Flattening a PDF locks all interactive elements, such as form fields and annotations, merging them permanently into the visual background of the document. This prevents anyone from modifying the text later.
Is my document secure?
Yes. The flattening process runs 100% locally in your browser. Your sensitive files and form data are never uploaded to our servers.
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