Flatten PDF
Lock form fields into the page content. Free, private and processed in your browser — files are never uploaded.
How to use Flatten PDF in 4 steps
- Upload the PDF with form fields.
- Click "Flatten PDF".
- Every field's current value becomes part of the page.
- Download the flattened PDF.
When to use Flatten PDF
Preparing a signed form for archiving, making an interactive PDF safe to print, removing form fields before sharing publicly, or locking annotations.
Key features
- Removes All Form Fields — Interactive text fields, checkboxes, and buttons are removed after flattening.
- Keeps the Look — Every field keeps its current value and appearance — it just can't be edited any more.
- Print-safe Output — Printers that struggle with interactive content handle flattened PDFs perfectly.
- Can Reduce File Size — Removing interactive object overhead sometimes makes the file smaller.
- Irreversible Operation — Flattening is permanent — save a copy of the original if you need to edit later.
Frequently asked questions
What does flattening do?
Form fields are replaced by their visible values, so the form looks the same but can no longer be edited.
Are comments and annotations flattened too?
No — this tool flattens form fields. Comments stay as they are.
Can I undo it?
No. Keep the original if you might need to edit the form again.
Why flatten a form before sending it?
So nobody can change your answers, and so the form looks the same in every viewer, including ones that hide form fields.
AgentHunter Featured AI Agent 
