📐 Flatten PDF
Permanently merge annotations, form fields, and stamps into the PDF content. Makes signatures and form data permanent. 100% private — all in your browser.
Drop a PDF file here or click to browse
Annotations, form fields, and stamps will be flattened
✅ PDF Flattened
All annotations and form fields have been permanently merged into the document.
Note: pdf-lib flattens form fields and most annotations. Complex annotation types (free text, rubber stamps) are preserved. For full flattening of all annotation types, consider using a desktop tool like Adobe Acrobat.
About Flatten PDF
Flatten PDF files to make annotations and form data permanent. Works entirely in your browser.
Make Signatures Permanent
After signing a PDF, flatten it so the signature can't be removed or tampered with.
Lock Form Data
Finished filling out a form? Flatten it to make the data permanent before sharing.
100% Private
Your PDF never leaves your browser. All processing via pdf-lib.
Instant Processing
Flattening happens locally in milliseconds. No waiting for server uploads.