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Do I need to install software to flatten a PDF?
Updated July 2026
No. You flatten a PDF entirely in the browser — there is nothing to download or install. Flattening a PDF merges form fields, annotations and layers into the page, so nobody can change filled-in values and the file renders everywhere.
Answer
No. You flatten a PDF entirely in the browser — there is nothing to download or install. Flattening a PDF merges form fields, annotations and layers into the page, so nobody can change filled-in values and the file renders everywhere.
More about flatten pdf
Flattening bakes form fields and annotations into the page so they can't be changed.
It fixes forms that display differently in different viewers.
A flattened PDF is the safe way to share a completed form.
How to flatten a PDF
- 1
Open the flatten tool
Sign in and open the Flatten tool.
- 2
Add your PDF
Upload a form or annotated document.
- 3
Flatten
Arthize bakes fields and annotations into the page content.
- 4
Download
Get a flattened, tamper-resistant PDF.
Common questions
- How do I flatten a PDF form?
- Flattening a PDF merges form fields, annotations and layers into the page, so nobody can change filled-in values and the file renders everywhere. On Arthize it's free with no watermark and processed privately.
- Why do my filled form fields disappear in some viewers?
- Flattening a PDF merges form fields, annotations and layers into the page, so nobody can change filled-in values and the file renders everywhere. On Arthize it's free with no watermark and processed privately.
- Is flattening a PDF free?
- Flattening a PDF merges form fields, annotations and layers into the page, so nobody can change filled-in values and the file renders everywhere. On Arthize it's free with no watermark and processed privately.
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