Flatten PDF

Pro
1B+ users
Secure file transfer with TLS encryption. All files are automatically deleted.

Flatten every layer and element of a PDF into a single layer, locking in your content and preventing unwanted changes. Smallpdf Pro flattens unlimited files and keeps each one secure from upload to download.

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Flatten Any PDF for Accuracy & Integrity

  • Reduce File Sizes

    A PDF with multiple layers and visual elements takes up more space. When you flatten a PDF, you also smash your document size into files that are easier to share and store. Use our Compress PDF tool to make the file even smaller.

  • Flatten PDFs Online on Any Device

    Our Flatten PDF tool can be used from any device right through your browser. Try it out—just drag your PDF into the box above, no matter what screen you’re using.

  • Edit Before You Flatten PDFs

    Need to annotate a PDF before you permanently flatten it? Start with our PDF Editor to get just what you need, then flatten your PDF to preserve your document integrity.

  • Increase Your PDF Security

    A PDF with multiple layers adds multiple elements that can be tampered with. With PDF flattening, you basically lock in the content, increasing the security and integrity of your documents.

  • All Platforms Love Flattened PDFs

    A flatter document is an accessible document. No matter the platform or system, by flattening a PDF you’re reducing compatibility issues that come with complex docs.

  • Stay Private With Secure Encryption

    Your documents are secured with state-of-the-art TLS encryption technology the whole way. Upload, flatten your PDF, and download your new doc—no one will see your files but you.

How To Flatten PDFs

  1. Import or drag & drop your file to our Flatten PDF tool.
  2. Edit the PDF with our other tools if needed.
  3. Download or share your flattened PDF file when ready—done!

FAQs About Our Flatten PDF Tool

  • What is Flatten PDF?

    Flattening a PDF file is similar to baking a pizza; it merges all the layers and elements into a single, unmodifiable layer. This process prevents content from being changed or manipulated, ensuring the document's accuracy and improving its fidelity.

  • Why is it important to flatten PDF layers?

    By merging PDF layers, you’re making your document more secure, more reliable, and more compatible across any system. It also removes complexity from the doc, which reduces file size and makes it more shareable across systems. And with everything locked in place, your PDF looks the same no matter who opens it or what device they're using. And when you go to print your PDF, it comes out exactly like it looks on your screen. No surprises!

  • What happens when I flatten a PDF?

    Flattening a PDF merges all elements, including text, images, and fillable form fields, into a single, uneditable layer. This process also removes interactive elements such as hyperlinks and PDF forms. The result is a consistent, non-interactive document that can be easily shared, accessed, and printed across different systems.

  • Can I undo a flattened PDF to restore the layers?

    In general, no. Once a PDF has been flattened, the process can’t be easily reversed. So make sure you save a copy of your original file before flattening in case you need to make edits later. Of course, you can also use a separate tool like our PDF Editor to recreate annotations, images, links, and more if you don’t have an unflattened copy of your doc.