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Password protect a PDF

A payslip, a tax notice, a contract to send by email? Encrypt the PDF: it will only open with your password, in any PDF reader.

Choose a PDF

or drop your file here · free, no sign-up

  • Free and ad-free
  • Your files stay on your device
  • Works on phone and computer

Protect PDF in 3 steps

  1. Open the PDF

    Pick the document to protect. It stays on your device.

  2. Choose the password

    Type it twice. Allow or block printing and copying text.

  3. Download

    The PDF is encrypted with 256-bit AES: without the password its content can’t be read.

Why PDFmoji

Actually free

Merge, compress, convert, sign: free and unlimited, no account, no ads.

Your files never leave

Everything runs in your browser: your PDF is not uploaded to any server.

Built for phones

Open the PDF you got by email, make the change, download. It works on computers too.

One tool for everything

Edit text, sign, fill in, merge, compress: no need to go through five websites.

Frequently asked questions

Is the password sent to PDFmoji?

No. Encryption happens in your browser; neither the document nor the password leaves your device.

Does the PDF open everywhere?

Yes: Adobe Acrobat, Preview, Chrome, Firefox, Edge and mobile apps ask for the password, then open it normally.

I forgot the password, what now?

PDFmoji doesn’t keep it and can’t recover it. Keep an unprotected copy of the document.

Is it really free?

Yes. Merging, splitting, compressing, converting, signing and filling are free and unlimited. With a free account you can also edit the text of 3 PDFs a month in their original font and make 10 Assistant requests. The 7-day pass (€4.99) or PDFmoji Pro (€7.99 a month, no commitment) removes these limits.

More PDF tools

Organize

Merge PDFCombine several PDFs or photos into one file.Split PDFExtract the pages you need into a new PDF.Compress PDFReduce a PDF’s size to send it by email.Organize pagesMove, rotate or delete pages.Rotate PDFTurn upside-down or sideways pages the right way.Delete PDF pagesRemove blank or unwanted pages in one tap.Add page numbersAdd page numbers, a header and a footer.Watermark PDFStamp pages “Confidential”, “Copy” or your own text.

Convert

PDF to WordGet a PDF’s text into an editable Word file.PDF to JPGTurn every page into a JPG or PNG image.JPG to PDFTurn your photos into a clean PDF, like a scanner.Read PDF aloudListen to your document instead of reading it.PDF to ExcelTurn invoices and statements into a spreadsheet with AI.

Edit and sign

Edit PDFChange a word, a date, an address, in the original font.Add text to PDFType anywhere on the page, even outside form fields.Add image to PDFInsert a logo, a photo or a scanned stamp.Add emoji to PDFCrisp emojis in any PDF.Sign PDFSign with your finger or mouse, add the date.Fill PDF formFill in fields and the dotted lines of any form.Create fillable PDFTurn lines and boxes into real form fields.Redact PDFPermanently hide sensitive information.Unlock PDFRemove the password of a PDF you know the code of.OCR: editable scanMake the text of a scan or photo editable.

Artificial intelligence

Chat with PDFAsk a document questions, the AI answers.Summarize PDFGet the gist of a long document in a few lines.Translate PDFTranslate a PDF and keep its layout.Compare PDFSpot the differences between two versions.Invoice generatorDescribe the job, the AI lays out the invoice.

Password protect a PDF

Choose a PDF