Flatten PDF
ReadyTurn PDF form fields into permanent content. Only existing form fields are flattened; comments and other annotations are kept. Files are processed in this browser and never uploaded.
All tools are free to use. File size and processing limits may vary by tool.
How to use
Select the PDF and run; the fields become flat. Useful to lock a form after staff fill it in. Download and confirm nothing shifts when it opens.
Browser tools keep files on your device. Advanced document tools upload files for temporary server processing; the tool shows this before upload. Web lookups send queries to the server and public lookup services.
Flatten PDF: Lock Form Fields in Place
Interactive application forms and surveys can shift or lose data when fields remain editable during forwarding. Flattening converts the filled form fields into fixed page content. The tool only locks existing form fields and preserves comments. Processing happens entirely in your browser, so sensitive forms never leave your device.
Read the guide →Try a real example file
This document was created for demonstration and contains no customer or employee data. Download the input and actual tool output to compare them.
Example checked on:
Use the separate form example for field values. Flattening kept the value visible and left zero editable fields. Keep the original of forms or signed files.
Checks on this example
- Input pages
- 3
- Output pages
- 3
- Form fields before
- 1
- Form fields after
- 0
- Retained text
- Demonstration only
Only the example below was verified. Other files may produce different layouts or results; keep the original.
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Continue with this PDF
Send the completed PDF to compression, page extraction, rotation, watermarking or numbering without selecting it again. Filled forms can also go to flattening. You start each step; modifying a document may affect digital signatures. Split-result ZIP files are not transferred.
Transfer happens between open tabs; we do not save the file in browser storage for this. This step does not start a new upload. Choosing server processing in the destination uploads the file again; its size limit applies.