Flattening a PDF converts interactive or layered content (form fields, annotations, comments, signatures, and sometimes transparent objects) into static page content, so it appears the same everywhere but is no longer editable or interactive. It preserves appearance for recipients, prevents further editing of form fields or annotations, ensures accurate printing or PDF, or prepares a document for evidence purposes.
But how do you flatten a PDF? We've covered the best methods for flattening PDFs. Read this post to find the best one for you.
Method 1. Using Microsoft Edge
This is a good way when you want a quick flattened result without installing software. (Always keep an original editable copy before flattening.)
1. Right-click on the target PDF, and select Open with Microsoft Edge.
2. To print a PDF properly, it usually needs to be flattened first. So, press the Print button in the upper-right corner.
3. Choose Microsoft Print to PDF as the printer.
4. Press the Print button, and then name and save your new PDF.
Method2. Flatten PDF with Wise PDF Editor
The best way to flatten a PDF is by using a professional PDF editor, which allows for more flattening options, simplifies the process, and saves lots of time. If you flatten, share, or print PDFs regularly, it’s worth using a PDF editor.
It’s recommended to use our all-in-one PDF editor, Wise PDF Editor, which is an affordable Adobe alternative. We've chosen Wise PDF Pro because it's powerful, easy to use, and more affordable than other PDF editors.
Step 1. Download and install Wise PDF Editor
Don’t have Wise PDF editor? Download and install it from here.
Step 2. Open Wise PDF Editor
After the installation of Wise PDF Editor. Right-click on your PDF, then choose Open with Wise PDF Editor. Click the Protect tab> Flatten.
Step 3. Flatten the PDF file
In the Flatten PDF document dialog box, specify any settings you'd like to change (if any), then press Start. That's it. You now have a flattened PDF file.
Method3. Online Tools (Smallpdf, Drawboard PDF, PDF24 Tools, etc.)
Many websites offer flatten PDF or convert PDF to flattened PDF tools. Steps are usually:
1. Upload file.
2. Choose Flatten or a similar tool.
3. Download the flattened PDF.
Strong caution: Do not upload sensitive or confidential documents to online services unless you trust their privacy policy and security, or the document is not sensitive.
How to Verify Flattening Worked
Open the output PDF in a viewer and try to click on what were form fields or annotations. If they no longer respond, they’re flattened successfully.
Conclusion:
Microsoft Edge’s Print to PDF is fast and requires no extra software; for regular use or more control, a dedicated editor like Wise PDF Editor offers the simplest, most reliable workflow. Online services can also be convenient, but avoid them for confidential files unless you trust their security and privacy. Following the methods above, you can flatten a PDF easily.
