or drop a file anywhere here
Files other than PDF are converted first. Signing in raises the size limit.
To sign a PDF here, you make your signature once and place it wherever it belongs. Draw it with a mouse or your finger, type it in a handwriting style, or upload a PNG or JPEG of your own handwriting. Initials, your name, the date, a line of text and a company stamp work the same way. Press Sign and the signed PDF downloads, so you do not need to print or scan it. Signing it yourself needs no account. When other people have to sign too, you can email the file to them from the same page. The signature is a visible image stamp on the page. For a certificate signature, use Certificate Sign.
Our own 2-page A4 agreement PDF with a signature line on page 2, 42,339 bytes, no signatures before
Draw lets you pick a pen width of Thin, Medium or Bold and an ink colour. Type turns your name into a handwriting style you choose. Upload takes a PNG or JPEG, such as a photo of a signature on paper, and can remove its white background.
A signature is made once and placed any number of times, on any page. That covers a contract that needs your signature on every page and a form with several signature lines.
Optional fields sit beside the signature. The date comes in five formats, from Short to ISO 8601. A company stamp can be round, a rectangle or a badge, and it can carry a second line such as a registration number.
The page runs in your browser, so the steps are the same on a phone, a tablet and a Mac. There is nothing to install. The page has a phone layout, and you can draw your signature with a finger.
With an account, choose Several people, add each signer's name and email, and mark where each one signs, writes a name or dates. You can ask for an email code before signing and add a message. Every signer gets a private link.
Sent requests are listed under Sent from this file with a count such as 2 of 3 signed. You can manage participants and resend an invitation. When everyone has signed, Open signed copy loads the result into the editor.
Put your PDF in the upload area by choosing a file, using From URL, pasting from the clipboard or scanning pages with your phone. It opens in the editor with the Sign tool ready.
A box asks who will sign the document. Choose Only me to sign it yourself, or Several people to invite others by email.
In the details box, choose Draw, Type or Upload. Set the pen width and ink colour, pick a handwriting style, or choose your image. Then press Apply.
Press Place your signature, then click or tap the spot on the page. Repeat for every spot. Under Optional fields you can place initials, your name, the date, text or a company stamp.
The panel counts what you have placed. Sign applies your signatures and downloads the PDF. Open the file and check each spot before you send it on.
Here you make the signature once, place it as often as the document asks, and download the result without a printer or scanner. Signing for yourself needs no sign-up. When other people have to sign, you send the request from the same page and each signer opens a private link without an account.
| What you see | Why | What to do |
|---|---|---|
| The signature is turned and partly off the page, and the line is empty | In our test of a page with /Rotate 90, the editor showed the signature upright on the line, but the output stamp was turned and about 120 pt of it was off the page. indox still showed Done. | Rotate the page upright first with Rotate PDF pages, then sign. Open the downloaded file and check every spot. |
| A reader shows no signature, or says nothing can be verified | The signature is an image placed on the page. In our test the file had 0 signature fields. | For a signature a reader can verify, use Sign a PDF with a certificate. |
| Searching the file for my name finds nothing | The signature is a picture, so it is not in the text layer. In our test the extracted text matched the original. | Add your name as text under Optional fields if you want it searchable. |
| The signature sits a little above the line | The mark lands where you drop it. In our test it sat 8 pt above the line. | Drag it into place before you press Sign. |
| The download is named agreement-edited.pdf | The new file carries the name of your upload with -edited added. | Rename the file before you send it. |
| Awaiting signatures | The request went out and at least one signer has not signed. Each signer shows Sent or Viewed until they act. | Wait, or use Resend invitation for a signer who lost the email. The old link stops working. |
| Signed | Every signer has signed and the signed copy is ready. | Choose Open signed copy to load it into the editor, or download it. Undo brings your own file back. |
| Declined | A signer chose Decline to sign. The signing closes for everyone. | Find out what the signer objected to, fix it and send a new request. |
| Expired | A signer's link ran out before they signed. | Use Resend invitation to give that signer a new link. |
| Couldn't be sealed | Every signer signed, but the signed copy could not be produced. | Send the request again. |
| Option | What is in the file | What a reader can check |
|---|---|---|
| Sign PDF here, signing for yourself | An image placed on the page. In our test the file had 0 signature fields and 0 byte ranges. | Only what you can see. Nothing in the file shows who signed or whether it changed afterward. |
| Sign a PDF with a certificate | A signature entry with a byte range over the file and the signature value (ISO 32000-1, section 12.8). | A change to the signed bytes after signing can be detected. Whether the signer is trusted depends on the certificate. |
| Several people sign from this page (account needed) | Each signer's mark, then indox's own digital seal on the finished file. | Later changes can be detected. The seal is indox's, not each signer's, and a reader may not trust it. |
A form or agreement that needs your signature usually means printing it, signing it by hand and scanning it back, which takes a printer, a scanner and time. Sign PDF puts the signature you draw, type or upload onto the page and gives you a new PDF, or emails the file to each person who has to sign. In the US, the ESIGN Act says a signature or contract cannot be denied legal effect only because it is electronic, and the EU's eIDAS Regulation says an electronic signature cannot be refused legal effect or use as evidence in court for that reason alone. The ESIGN Act does not make anyone accept an electronic signature and leaves out some documents, such as wills, divorce and adoption papers and court orders, so check what the recipient accepts.
A lease, a consent form, a permission slip or an NDA arrives as a PDF and has to go back signed. Sign it here and send the file back without printing it. A signature you place yourself is an image on the page, so on its own it does not prove who signed.
Send one contract to a client and a partner at once. Each person signs from a private link sent to their email, and you can ask for a one-time code first. When everyone has signed, the file gets a certificate of completion that lists when each person agreed and signed, their IP address and browser, and a SHA-256 fingerprint of the file as sent.
You do not need an account. Before you sign, the page tells you that you can ask the sender for a paper copy, that you can withdraw by choosing Decline to sign, and what you need to open the file. The ESIGN Act lists these among the things a consumer must be told before agreeing to receive records electronically. Agree to the notice, add your signature and press Sign document.
Facts checked on November 5, 2026
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Add your PDF, choose Only me, make your signature with Draw, Type or Upload, place it on the page and press Sign. The signed PDF downloads, and no account is needed for this.
Open this page in your phone's browser and add the PDF with Choose file, From URL or Paste. Draw your signature with a finger, tap the page to place it and press Sign. The digital certificate option is not offered on a phone.
Yes. The tool runs in your browser, so you do not need a separate app. Follow the same five steps, and draw with the trackpad or type your name in a handwriting style.
Not to sign it yourself. Signing a file with Only me works signed out. An account is needed to email a request to other people, and the people you invite do not need one.
In the United States, the federal ESIGN Act says a signature or contract cannot be denied legal effect, validity or enforceability solely because it is in electronic form. It has exceptions, some documents have their own rules, and other countries differ. This page gives no legal advice, so check the rules for your document.
To place your own signature several times, press Place your signature again for each spot. For signatures from different people, choose Several people, add each signer and mark a signature box for each one.
Choose Several people. Sign in, add each person's name and email, mark where they sign, review and press Send for signature. Each person gets a private link by email, and you can follow progress under Sent from this file.
Open the link from the email. If the sender asked for it, press Email me a code and enter the code. Review the document, press Add your signature, agree to sign electronically and press Sign document. You can also choose Decline to sign.
Here your signature is an image placed on the page. A digital signature is made with a certificate and stored inside the file. When several people sign, the finished file also carries indox's digital seal, which is not a signature by any of the signers. To sign with your own certificate, use Certificate Sign. To check a file afterwards, use Check PDF. In our test the signed file had 0 signature fields.
On upright pages the signature lands where you place it. On a page with a /Rotate 90 setting, our test put the stamp turned and partly off the page. Rotate the page upright first with Rotate PDF pages, then sign it.