Why flatten a PDF before filing or sending it?

A flattened PDF shows the same content in every viewer and can't be changed by editing a form field or deleting a comment. Courts, registries and counterparties often ask for flattened files, and flattening keeps filled-in values from being altered after you sign off.

Can a flattened PDF be edited again?

Not as a form. Field values and annotations become ordinary page content, so they can no longer be typed into or toggled. Keep the original if you may need to change it later.

What does flattening do?

Flattening converts interactive elements (forms, annotations, layers) into static content that cannot be edited. The visual appearance is preserved.

Can I unflatten a PDF?

No. Flattening is irreversible. Always keep a copy of your original document before flattening.

Why would I want to flatten a PDF?

Flattening ensures the document looks the same everywhere, prevents form editing, and can reduce file size. It's useful for final distribution.

Flatten PDF

Powerful Flatten PDF Features

Merge Layers

Combine all content into a single layer.

Preserve Appearance

Visual look unchanged after flattening.

Finalize Documents

Prevent further editing of forms and annotations.

How To Flatten PDF Online for Free

Upload PDF

Add the document to flatten.

Flatten Content

Interactive elements become static.

Download Result

Get your flattened PDF.

Flatten PDF form fields, annotations, and layers into static content. Convert interactive elements to fixed images. Essential for finalizing documents and ensuring consistent appearance.

Everything You Need in a Flatten PDF

Flatten Forms

Convert form fields to static text.

Merge Annotations

Embed comments and markups.

Flatten Layers

Combine all PDF layers.

Size Reduction

Often reduces file size.

Print Ready

Consistent output on any printer.

Local Processing

Flattened in your browser.

How it works locally

Flattening runs in your browser: each form field is drawn into the page with its current value and then removed, and in full mode every comment, stamp or ink annotation is drawn into the page as well. Links keep working, and the file is never uploaded.

Legal & compliance toolkit

More tools for preparing confidential and legal PDFs, all running in your browser.

View Metadata
Check what a PDF reveals: properties, XMP, forms and restrictions.
Remove Metadata
Delete author, software, dates and XMP history from a PDF.
Sanitize PDF
Strip metadata, scripts, attachments, comments and form data before sharing.
Redact PDF
Permanently remove confidential text, not just cover it.
Edit Metadata
Set a clean title, author and subject on a PDF.
Bates Numbering
Number every page for discovery, e.g. ACME000001.
Header & Footer
Put case numbers or confidentiality notices on every page.
Add Stamps
Mark pages CONFIDENTIAL, DRAFT, APPROVED or your own text.
Sign PDF
Add a visible signature to a contract or form.
Protect PDF
Encrypt with AES-256 and an open password.
Change Permissions
Allow or block printing, copying, editing and comments.
Remove Restrictions
Lift printing, copying and editing restrictions you're entitled to.
Validate Signature
Check the digital signatures in a signed PDF.

All secure PDF tools for legal work

Frequently Asked Questions

Document Work Made Easy

Process your PDFs with our collection of free, privacy-first tools. No uploads to servers, no registration required. Everything runs directly in your browser.