Flatten PDF Free
Lock form fields, merge annotations, and flatten layers into a single, uneditable PDF — all in your browser.
Flatten PDF NowNo signup. Documents processed in your browser — nothing uploaded.
Flattening a PDF merges form fields, annotations, comments, and layers into a single flat document. The content becomes part of the page — it cannot be edited, moved, or extracted. fileGOD flattens your PDF entirely in your browser using pdf-lib, so your document is never uploaded to any server. Ideal for finalizing forms, locking signatures, and preparing documents for archival. Many court filing systems, government portals, and corporate workflows require flattened PDFs to ensure the document renders identically on every device and cannot be tampered with after submission. Flattening also reduces file size by eliminating interactive element metadata — a filled form that was 3MB can drop to under 1MB after flattening. The process is irreversible by design, so always keep a copy of the original editable version.
How It Works
Drop your PDF
Drag and drop a PDF with form fields, annotations, or comments into the tool.
Flatten instantly
All interactive elements are merged into the page content. Form fields become static text, annotations become part of the page.
Download the flat PDF
Preview the flattened document and download. All content is permanently locked in place.
Why Flatten with fileGOD?
Flatten Form Fields
Text fields, checkboxes, dropdowns, and radio buttons become static content. Values are preserved, but fields are no longer editable.
Merge Annotations
Comments, highlights, sticky notes, and markup become part of the page. They cannot be modified or deleted.
Lock Signatures
Digital signature fields are flattened into the page. The visual appearance is preserved.
Reduce File Size
Flattened PDFs are often smaller because interactive element metadata is removed.
100% Client-Side
Your document is processed in your browser using pdf-lib. No file is uploaded to any server.
Preserves Layout
Page layout, fonts, images, and formatting remain exactly as they appeared before flattening.