Why this tool is useful
Complete a known application or worksheet form from an explicit field-name mapping while keeping personal entries on the current device.
Local File Tools · runs locally
Private PDF Form Filler
Fill named text, checkbox, dropdown, option-list and radio fields in a local PDF from bounded JSON, optionally flattening the result without uploading it.
Ready. Your working data stays in this browser.
Files and capture streams stay on this device. Processing uses browser APIs only; nothing is uploaded to YTSave, the media API or a proxy.
How it works
The browser opens the PDF with pinned pdf-lib, matches at most 100 exact field names, validates each value against its actual form type and writes a new local PDF.
Practical example
Enter a JSON object whose keys match the form's field names, fill a text field and checkbox, keep the fields editable, then verify the values in the downloaded copy.
Validation
The calculation is deterministic and explains validation errors instead of silently changing invalid input.
Privacy boundary
Input and output remain in this tab. Copy and download happen through browser APIs without a server upload.
Result passport
Every run reports its tool mode, timestamp and input/output size so transformed data can be audited.