Rayo PDF GOFlatten PDF Online
Flatten a PDF so nobody can edit your signatures, comments, or form fields. Free, private, and nothing is uploaded.
Drop your PDF file here
or choose it from your device
- Local processingEverything on your device
- No uploadsYour information stays private
- No watermarksClean, professional results
How to use Flatten PDF in 3 steps
- 1
Open the PDF you want to flatten
- 2
Read the note and tap Flatten PDF
- 3
Save the flattened copy
Flatten PDF: what it is and when to use it
Flattening turns every page into a fixed image: what you see on screen is exactly what stays, with no layers or fields that can be changed.
When you fill in a form, sign, or add comments to a PDF, those elements usually remain independent layers: anyone who opens the file with the right program can move, delete, or change them. Flattening removes that possibility.
Truly private
Your files are processed on your device and never uploaded to a server.
In Rayo PDF GO the process is simple: each page is drawn with everything you can see and saved as an image inside a new PDF. The result is a stable document, identical in any viewer, that can no longer be edited the way it was before.
It is different from password protection: there is no key here, the content simply stops being editable. To also prevent the file from opening, combine Flatten with Protect PDF.
Common uses
Lock a completed form before sending it.
Make sure a drawn signature cannot be moved into another document.
Share a PDF with comments that cannot be deleted.
Keep the content looking the same across different viewers.
Tips for better results
- Always keep an editable copy of the original: flattening cannot be undone.
- If you need searchable text afterward, run the result through OCR.
- To stop the file from opening without a key, use Protect PDF.
Why Rayo PDF GO
Truly private
Your files are processed on your device and never uploaded to a server.
Fast
No queues, no waiting for a server.
On every device
iPhone, Android, Mac, Windows and browser.
Free to start
Essential tools are free; Premium unlocks the advanced ones.
Frequently asked questions
What does flattening a PDF mean?
Annotations, comments, drawn signatures, and form fields stop being separate elements and become part of the page. They can no longer be moved, deleted, or edited.
Can I still select the text?
No. Each page becomes an image, so text can no longer be selected or searched. If you need searchable text, run OCR afterward.
Are my files uploaded?
No. Everything is processed on your device.
Is it free?
Yes, flattening a PDF does not require Premium.
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Knowledge base
See the whole knowledge base ›- GlossaryFlatten a PDF
Lock annotations, signatures and forms so they can no longer be edited.
- File formatPDF
What the PDF format is, why it looks the same everywhere and what it contains besides pages.
- GlossaryOCR
How a scanned page becomes selectable text instead of an image of words.
- GlossaryPDF metadata
The author, dates and software details that a PDF carries alongside its pages.
- GlossaryProcessing on your device
What it means that a file is not uploaded to any server and why it matters.
- GlossaryLossy and lossless compression
How a file's size is reduced and what is sacrificed in each case.
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