Make all form fields and annotations permanently non-editable.
Flattening a PDF merges all interactive form fields, annotations, and layers into the static page content. Once flattened, form fields can no longer be edited — but the data is permanently preserved in the visual layout, which is important for archiving completed forms.
Businesses flatten completed intake forms before archiving or sharing. Legal departments flatten annotation layers from reviewed contracts before final distribution. Accountants flatten completed tax forms before long-term filing. Anyone who needs to permanently lock in filled form data before sharing benefits from flattening.
Flattening removes all interactive layers (form fields, checkboxes, text annotations) and merges them into the static page background. The resulting PDF is smaller and compatible with older PDF viewers that don't support forms. Runs entirely in your browser.
Your files never leave your browser. No account required, no server uploads — just fast, local processing. This is what it means to flatten PDF without uploading.
Prevents further unauthorized edits to form fields.
Happens locally without uploading.
No, flattening is permanent.
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