Compress PDF
Reduce PDF size with Basic, Balanced, or Strong compression.
- Secure processing
- No signup
Optimize
Flatten PDF
Upload a PDF with form fields and flatten interactive fields into static page content. Useful for print-ready forms. Processing runs on your device—files are not uploaded or stored.
Stays private
Processed on this device
Clear progress
Real stages, no fake percent
Honest output
Limits and warnings included
PDF
On-device processing
PDF output
25 MB max
How it works
- 1
Upload
Choose and validate your file
- 2
Process
Review options and run the tool
- 3
Download
Check the result and save it
Keep working
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Grayscale PDF
Convert supported page colors to grayscale on your device.
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Helpful answers
Is Flatten PDF free?
Yes. It is free to use and you do not need to sign in or create an account.
Is my data private?
See the privacy note on this page. Many tools run on your device; some heavier file tools may use secure temporary processing when required.
Can I use Flatten PDF on mobile?
Yes. Open this page on your phone or tablet, enter your inputs, and use the on-screen controls.