100% local processing — your data never leaves your device.
Fill a PDF Form
Detect and complete AcroForm fields. Optional flatten on export. 100% local pdf-lib.
Proof of local processing
This tool is classified as local in the WebFileTools registry: processing is expected to stay inside your browser.
- •The page is declared as local in the public tool catalog.
- •No server-side storage is announced for this processing flow.
- •The easiest verification is to monitor the Network panel while it runs.
How to verify it yourself
- 1Open your browser developer tools and switch to the Network panel.
- 2Run the processing flow with a test file.
- 3Confirm that no upload request containing your file is sent to WebFileTools.
You use this tool often? Pro includes files up to 500 MB and priority processing.
What is Fill PDF Form?
AcroForm PDF filler: auto-detect fields, fill, export PDF.
How to use this tool?
Upload a fillable PDF, complete fields, download the filled PDF.
Benefits
- Auto-detect
- Text + checkbox + lists
- Optional flatten
- 100% local
Frequently Asked Questions
- Which fields are supported?
- Text, checkboxes, dropdowns and radio groups via pdf-lib.
- Can I lock fields after filling?
- Yes, enable flatten to make values non-editable.
- Does my PDF leave my device?
- No, everything runs locally in the browser.
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