Flatten PDF Form
Lock filled-in values so they cannot be edited
Choose a file
Fields found
Choose a PDF and the form fields it contains will be listed here.
Save
Flattening cannot be undone. The original is never overwritten; a new file is downloaded. Files are processed in your browser and never sent to a server.
How to use
Freezes the values you typed into a PDF form so they can no longer be edited. What used to be an input box becomes plain page content that nobody can change or clear by accident. The fields are listed first, then flattened. Everything runs in your browser; nothing is uploaded.
When to use it
- Submitting a filled application so the recipient cannot alter the answers.
- Producing copies for circulation that stay exactly as written.
- Settling a document whose form fields print or display inconsistently.
How to use it
- Choose a PDF (up to 200 pages, 50MB). The tool reports how many fields it found and their names.
- If two fields share a name, you are told — flattening makes them all carry the same value.
- Press Flatten and save to download a new file that looks exactly like what you see.
Good to know
- Flattening cannot be undone. Your original is not overwritten, so keep the filled version if you may need to edit it again.
- Values are frozen as they appear on screen. If a field has no stored appearance, the value is redrawn and the tool asks you to check the result.
- If the font named in the file cannot represent a character, the tool stops instead of substituting something wrong. This shows up with non-Latin text in Latin-only forms.
- If the PDF has no fillable fields, it says so — there is nothing to flatten.
- Password-protected PDFs cannot be opened.
Frequently asked questions
What actually changes?
The field stops being a field and its text is drawn onto the page. It looks the same, but nobody can click into it, and viewers that ignore form data still show the values.
Can I edit the values afterwards?
No, which is why keeping the filled original is worth it. To change something, edit that original and flatten it again.
It says some fields share a name.
PDF forms treat identically named fields as one field — type in one and the others follow. Flattening freezes them all with that value, so if they need different answers, the form itself has to be rebuilt.
It says the value could not be redrawn.
The font declared in that PDF does not contain the characters you typed, typically non-Latin text in a Latin-only form. Substituting look-alike characters would change the content, so the tool stops. Ask for a form built with a suitable font, or print and scan instead.
Can it freeze a signature too?
This tool handles form values. To lay a stamp or signature image on the page, use the PDF stamp tool first and flatten the result here.