Flatten PDF
Permanently bake interactive form fields, checkboxes, and markup annotations into static page graphics for legal archiving and finalization.
Permanently lock and flatten interactive AcroForm fields, checkboxes, and markup annotations into the document’s base graphical layer. Essential for court submissions, final contract execution, and tamper-resistant archiving.
How to use Flatten PDF in 3 simple steps
Select Your Files
Drag and drop your document directly into the browser. Your file stays on your hardware and is never transmitted across the network.
Configure Options
Customize parameters, page sequence, orientation, or compression presets with instant interactive live feedback.
Save & Download
Click the action button. The new document is compiled in memory and downloaded straight to your device.
Frequently Asked Questions
What is the difference between flattening and signing?
Flattening bakes interactive fields into the static page image so they cannot be edited in form readers. Digital signing uses cryptographic certificates to guarantee non-repudiation and byte-level tamper detection.
Can a flattened PDF be unflattened later?
No. Flattening is a permanent conversion that merges form widgets and annotation streams into the background page contents.
Are my files uploaded to a server?
No. PDFMiniFly processes everything locally inside your browser. Your document never leaves your device, and once the app is installed it also works offline.
Explore Other PDF Tools
View all 44 tools →Smart Redaction
Detect and permanently blackout sensitive emails, phone numbers, IDs, and dates.
PDF Health Check
Inspect structure, metadata, encryption, font assets, and get actionable recommendations.
Document Sanitizer
Purge hidden metadata, author information, comments, and JavaScript attachments.