Flatten PDF
Lock PDF form fields so the document can't be edited
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🔒 Everything runs 100% in your browser. Your files and input are never uploaded to any server.
Freeze a PDF form's input boxes, checkboxes, and dropdowns as flat images with their current values. Once flattened, recipients can't change the content, so you can safely distribute signature requests or finalized documents.
How to use
- Drag and drop the PDF file, or click to select it.
- Check the page count and the number of detected form fields.
- Press the 'Flatten and save' button.
- Download the finished, non-editable PDF.
FAQ
- What changes when I flatten?
- Fillable form fields are locked to the values shown on screen, so the content can no longer be edited afterward.
- Does it work on PDFs with no form?
- Yes. If there are no form fields, the original is simply re-saved as-is, with no error.
- Is my file sent to a server?
- No. All processing happens only in your browser, and the file is never sent externally.