Flatten PDF

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

Used by

Operations teams
Students
Researchers
Office teams

Common errors

Input is copied from a source with hidden whitespace or encoding issues.
The result is not reviewed before being reused elsewhere.
The wrong options are selected for the target workflow.
The original data is not kept for comparison.

How it works

1Accepts the input for Flatten PDF.
2Runs the operation in the browser.
3Returns a result you can copy, download, or continue using.

Recommended workflow

1
Prepare the input
Use this tool as the focused step in a larger browser-based workflow.
2
Run Flatten PDF
Review the preview, copy or download the result, and keep everything local in your browser.
3
Next recommended tool
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Then continue with
Add Page Numbers to PDF: Stamp page numbers at the bottom of every PDF page.
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Then continue with
Repair PDF: Recover and rewrite a damaged or corrupted PDF file.
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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.