Turn fillable form fields into permanent, uneditable page content.
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Drop a PDF here, or click to upload
Locks in filled form field values
Flattening turns any fillable form fields into permanent page content, so the values can no longer be edited.
Your file will appear here.
Processing…
- Runs entirely in your browser — your file is never uploaded
- Locks fillable fields into permanent page content
- Free, no account required
How it works
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1
Upload the PDF you want to edit.
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2
Adjust the available options — rotation, text, placement, and so on.
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3
Apply your changes.
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4
Download the edited PDF.
Why use this tool
Every PDF task, one place
Merge, split, compress, convert, sign, and more — no need to juggle separate apps for each job.
Private by default
Most tools process your file entirely in the browser — it's never uploaded. When a conversion needs the server, the file is deleted within the hour.
Works on any device
Runs in the browser on Windows, Mac, Linux, iOS, and Android — nothing to install, nothing to trust but the tab.
Fast by design
No queues and no desktop app to wait on — most jobs finish in a few seconds, right where you are.
Convert to and from any format
Move between PDF, Word, Excel, PowerPoint, images, and HTML — output stays true to your original formatting.
Free, always
Every tool here is free to use, with no watermarks, page limits, or forced trial period.
Frequently asked questions
It merges interactive elements like form fields, dropdowns, and annotations directly into the base visual layer of the page.
No, flattening is a destructive, one-way process. Always keep a backup of the original interactive file.
It prevents the recipient from easily altering your filled answers and ensures the document displays correctly on all devices.
It visually locks the appearance of the signature but invalidates any cryptographic certificate attached to it.
Often yes, as it simplifies the complex internal structure of interactive widgets into flat, static vectors.
From the blog
Editing a PDF in Your Browser: How a Client-Side PDF Editor Actually Works
Adding text, filling forms, signing, and rearranging pages without a single byte leaving your machine. Here is what a browser-based PDF editor can do, what it cannot, and why that distinction matters.
How to Make Your PDFs Accessible: Screen Readers and Standards
A practical guide to making PDF documents accessible for screen readers and compliant with WCAG standards without rebuilding them from scratch.
How to Sign, Secure, and Password Protect Your PDFs Online
Learn how to protect sensitive information in your PDFs, apply password encryption, and electronically sign documents directly in your browser securely.
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