Flatten PDF Online - Free Browser Tool

Drop files here or click to browse

Locks form fields and annotations into the page content.

100% in your browser — files never leave your device.

Tip: use samples, upload, copy, download, and send-to actions inside the workspace where available.

What is Flatten PDF?

Flatten PDF is a free, browser-based tool that helps you get the job done quickly. Flatten form fields and annotations into static page content. It's built for speed and privacy: Everything runs locally in your browser — your data is never uploaded to a server. No sign-up, no installs, and no daily limits.

How to use Flatten PDF

1Paste or drop your data into the workspace.
2Adjust the available options to suit your data.
3Copy or download the result — it never leaves your browser.

Features

Fast, focused, and easy to use
100% client-side — no upload, fully private
Free with no account, no watermark, and no daily limit
Works on large inputs, limited only by your device's memory
Load a sample, then copy, download, or share your result

Common uses

Quick one-off data jobs without opening a heavy app
Preparing data before importing it elsewhere
Sharing a reproducible result with a teammate via a link

Frequently asked questions

How do I use Flatten PDF?: Paste or drop your data into the workspace, adjust the options to fit your data, then copy or download the result. Flatten form fields and annotations into static page content.
Is my data uploaded or stored anywhere?: No. Everything runs locally in your browser — your data is never uploaded to a server. Nothing is sent to a server, so it's safe to use with private or sensitive data.
Is Flatten PDF free?: Yes — it's completely free with no account, no sign-up, no watermark, and no daily usage limits.
What's the maximum file size?: There's no hard limit imposed by the tool. Because processing happens in your browser, the practical ceiling is your device's available memory — most everyday files work instantly.
Do I need to install anything?: No installs and no extensions — it runs entirely in your web browser and even works offline once the page has loaded.

What is Flatten PDF?

Frequently asked questions

How do I use Flatten PDF?

Paste or drop your data into the workspace, adjust the options to fit your data, then copy or download the result. Flatten form fields and annotations into static page content.

Is my data uploaded or stored anywhere?

No. Everything runs locally in your browser — your data is never uploaded to a server. Nothing is sent to a server, so it's safe to use with private or sensitive data.

Is Flatten PDF free?

Yes — it's completely free with no account, no sign-up, no watermark, and no daily usage limits.

What's the maximum file size?

There's no hard limit imposed by the tool. Because processing happens in your browser, the practical ceiling is your device's available memory — most everyday files work instantly.

Do I need to install anything?

No installs and no extensions — it runs entirely in your web browser and even works offline once the page has loaded.