Fill in form fields, write in blanks or dates, and sign, all in one pass. Free and private.
Use this tool free →NilPDF Fill & Sign combines three steps that used to be three separate tools into one pass: if your PDF has real fillable fields, they're detected and highlighted automatically so you can type straight into them; anywhere else on the page, switch to Text mode and click to write in a blank, a date, or a note; then switch to Sign mode to draw, type, or upload a signature and drag it into place. One "Apply & Download" bakes everything in and downloads the finished PDF. Nothing is ever uploaded to a server, form detection, filling, writing, and signing all happen locally in your browser.
Yes. Completely free, unlimited use, no account required.
Your files never leave your device. All processing happens in your browser using WebAssembly (Pyodide). NilPDF has no server, there is nothing to upload to.
That's fine, the Fields option only appears if NilPDF detects real AcroForm fields. On any other PDF you can still switch to Text mode and click anywhere to write in a blank or a date, then sign it.
No. It creates a visual signature, a picture of a signature placed on the page. It is not a certificate-based digital signature, and NilPDF makes no guarantee that it meets the legal requirements for your document.
Yes. Enter the password when prompted and NilPDF will decrypt the file locally before you fill it in or sign it.