Flatten PDF
Bake filled form fields into the page so they can no longer be edited — the PDF becomes static. Nothing is uploaded.
Drop a PDF here
Upload a filled form PDF to flatten
Max file size: 100MB
100% Private: All processing happens in your browser. Your PDF never leaves your device.
Flatten PDF Free Online
Flatten PDF is a free, in-browser tool that bakes interactive form fields into the page so a filled PDF can't be edited. Upload a completed form and the tool detects its text boxes, checkboxes, radio buttons, dropdowns, and signature fields, then merges their values into the document and removes the fields. The result looks identical but is fully static — perfect for locking a form before you send it, printing, or archiving. Everything runs locally on your device.
How to Flatten a PDF
Upload PDF
Drag & drop or click to select your filled form.
Review Fields
See how many form fields were found.
Flatten
Bake the values into the page in one click.
Download
Save the static, non-editable PDF.
Why Use TryDocsy to Flatten PDFs?
No Upload
Flattening happens in your browser. Your PDF never leaves your device.
Lock Your Answers
Once flattened, filled-in values can't be changed by anyone.
Consistent Display
The form looks the same in every PDF viewer after flattening.
All Field Types
Text, checkboxes, radios, dropdowns, and signature fields.
One Click
Detects fields automatically and flattens instantly.
Free & Private
No account, no email, no watermark, no file limits.
Frequently Asked Questions
What does flattening a PDF do?
Flattening bakes the current values of interactive form fields — text boxes, checkboxes, radio buttons, dropdowns, and signature fields — directly into the page. The fields are removed, so the filled-in answers become part of the document and can no longer be edited.
Why would I flatten a PDF?
To lock a completed form before sending it, so recipients can't change your answers; to make sure the form displays identically in every viewer; or to prepare a filled form for printing or archiving.
Will flattening change how my PDF looks?
No. The filled-in values render exactly where the fields were. Flattening only removes the interactivity — the visible content stays the same, and the pages are untouched.
What if my PDF has no form fields?
Then it's already static and there's nothing to flatten — the tool will tell you. Flattening only applies to interactive AcroForm fields.
Is my PDF uploaded to a server?
No. Flattening happens entirely in your browser using WebAssembly. Your PDF never leaves your device, which makes this safe for signed and confidential forms.
Can I flatten a password-protected PDF?
Not directly — remove the password first with our Unlock PDF tool, then flatten the unlocked file.