Bake form fields and annotations into the page so they can no longer be edited.
Flatten a PDF to merge interactive form fields, comments and annotations into permanent page content. The document looks identical but its fields can no longer be changed — perfect before sharing a completed form. Files are processed securely and never stored.
Upload your file using the tool above.
Adjust any settings to your preference.
Click the process button and wait for results.
Download your output using the download button.
To lock in what you have filled or marked up. A completed form still contains editable fields, so the recipient can change your answers, and some viewers display filled values inconsistently or not at all when printing. Flattening bakes everything into the page so it looks identical everywhere.
Interactive form fields and their values, plus annotations such as comments, highlights, stamps and drawn markup. They stop being separate objects and become part of the page content. Regular text and images are untouched — they were never interactive to begin with.
No. Once flattened, the fields no longer exist as fields — the values are drawn onto the page. That permanence is the point, but it means keeping an unflattened copy is wise if you might need to change an answer or reuse the blank form later.
Yes, Flatten PDF is completely free. No signup, no account, and no watermark on outputs. A Pro tier is available for 100 AI ops/day and larger file sizes.
Flatten PDF uploads your file over an encrypted connection to our own processing server, converts it, and returns the result. The file is deleted immediately after processing and is never used for anything else. It is not sent to any third party, and we keep no copies.
Drop a PDF to flatten
Bake in form fields and annotations so they can’t be changed
Drop your file into the stage to begin.
What flattening does: It converts fillable form fields, comments and annotations into permanent page content. The document looks the same but the fields can no longer be edited or cleared.
When to use it: Before sharing a filled-in form so the answers stay put, or to make sure annotations render everywhere.
Privacy: Your PDF is sent over an encrypted connection, flattened in memory, and deleted immediately after — never stored.