About the Flatten PDF
Flattening merges interactive elements — form fields, comments, stamps and layers — into the page itself. The PDF then looks identical in every viewer and printer, and its answers can’t be changed. Flatten just the forms, or everything.
How to Use the Flatten PDF
- Click the upload box and choose your file, or simply drag and drop it in.
- Adjust the available options to match what you need.
- Click the action button and let House of Convert do the work in seconds.
- Download your result instantly — no email, no account, no watermark.
Why Use the Flatten PDF at House of Convert?
- Free forever — every tool on this site is free to use, with no hidden limits.
- Private by design — your file is processed for this request only and never stored on our servers.
- Fast — results are usually ready in a few seconds, even for larger files.
- No installation — works entirely in your browser, on desktop or mobile.
Frequently Asked Questions
How do I flatten a PDF?
Upload it, choose “Form fields” or “Everything”, and click Flatten.
What does flattening a PDF mean?
Interactive items are turned into ordinary page content, so they can no longer be edited.
Why flatten a PDF?
To lock form answers, make annotations print reliably, and stop fields displaying differently in different apps.
Can a flattened PDF be edited?
Not as form fields — the content becomes part of the page.
Does flattening reduce file size?
Sometimes slightly, because interactive structures are removed.
Will flattening change the look?
No, it keeps what you see.
Should I flatten before printing?
Yes if comments or fields aren’t printing correctly.
Can I unflatten a PDF?
No, keep a copy of the original if you need to edit later.
Does the Flatten PDF tool work on iPhone and Android?
Yes.
Does the Flatten PDF tool store my PDF?
No, it’s deleted immediately.