Flatten PDF
Flatten form fields and annotations
Last updated:PDF flattening merges interactive form fields and annotations into the page's static content so they can no longer be edited. LlamaPDF processes the flatten via pdf-lib entirely in your browser. Essential when sharing signed contracts or filled-in forms that should not be modified by the recipient.
Drag & drop your file here
or click to choose
Max 50 MB · No registration needed
Your file stays on your device — never uploaded
How to flatten a PDF
- 1
Upload the PDF you want to flatten by dragging it into the box above or clicking to browse your files.
- 2
Preview the document and confirm which interactive elements should be flattened — form fields, annotations, comments, and signatures will all be merged into the page content.
- 3
Click Flatten and download the result. The flattening process runs entirely in your browser — your document never leaves your device.
Why use our PDF flattener?
Interactive elements in a PDF — fillable form fields, sticky notes, digital signatures, markup annotations — sit in their own layer above the page content. While useful during editing, these layers can cause printing errors, display inconsistencies across different PDF readers, and allow unintended modifications. Flattening merges all layers into a single static page, locking in every element exactly as it appears. This is essential before archiving, submitting official forms, or sharing a final version that must look identical everywhere.
Flattening is typically the last step in a document workflow. Before you flatten, make sure you've finished all edits and added your signature. After flattening, you can encrypt the document for an extra layer of security or compress it for faster sharing.
What is PDF flattening?
A PDF can contain multiple layers of content: the base page content, interactive form fields, annotation overlays, and digital signatures. Flattening collapses all these layers into a single content stream on each page. Once flattened, form fields become static text, annotations become part of the page image, and signatures are permanently embedded. The result is a simpler, more portable file that renders consistently across all viewers and printers. Flattened PDFs are also typically smaller because the interactive metadata is removed.