Make an electronic seal for free
Make round, square and date electronic seals for free. There is no usage limit. Names and PDFs are processed in your browser and never uploaded. Save a seal as a PNG with a transparent background to paste into Excel or Word, or open a PDF and stamp it anywhere on a page. You can open PDFs of up to 200 MB per file (100 MB on phones and tablets).
Make a seal
Typeface
This is a visual seal only. It does not prove identity or protect against tampering, and it is not an electronic signature. Do not use another person's or company's name.
Enter a name or characters to see the sample.
PNG size
Stamp a PDF (optional)
You can open one PDF at a time (up to 200 MB on this device). The PDF is processed in your browser and never uploaded.
How to use
- 1
Make a seal
Choose round, date or square and enter a name. Check the shape in the sample. The name you enter is never uploaded.
- 2
Save as PNG
Press "Save PNG" to save an image with a transparent background that you can paste into Excel or Word.
- 3
Stamp a PDF
Open a PDF, choose "Stamp" and press the page. Adjust the position and size, then press "Stamp and save".
About electronic seals
"Round" is a personal seal with the name written vertically; a space splits it into two columns. "Square" arranges characters in a square frame, and a space splits the columns. "Date" has a department at the top, the date in the middle and a name at the bottom, and the date can use the Japanese era or the Western year. Choose serif or sans serif and any color.
These seals are visual only. They do not prove identity or protect against tampering, and they are not electronic signatures. They cannot replace a registered seal or a bank seal. Do not make seals with another person's name or another company's name. Where proof is needed, use an electronic signature service. On a PDF, the seal is laid over the page so the text underneath shows through.
Specifications of this tool
- Input
- Output
- Limits
- One file at a time. Up to 200 MB per file (100 MB on phones and tablets)
- Free, no sign-up, no app to install
- Files are never uploaded (processed in your browser)
Frequently asked questions
Are the name and PDF I enter uploaded?
No. Making the seal and opening, stamping and saving the PDF all happen in the browser on your device. Only when you save a PDF, statistics that help us fix bugs (the page count range, the range of the number of seals, error types and so on) are sent to this site's server. They do not include names, the content of the PDF, file names or passwords. Saving a PNG sends no statistics. You can turn the statistics off with the "Send processing statistics" switch at the bottom of the page.
Can I paste it into Excel or Word?
Yes. "Save PNG" saves an image with a transparent background. Insert it into Excel or Word as an image to lay the seal over the text. Choose a size of 256, 512 or 1024 pixels.
Is this electronic seal legally valid?
It is a visual seal only, so it does not prove who applied it or that the document was not changed. Whether a seal is needed and how it is treated depends on the rules of the recipient. Where proof is needed, use an electronic signature service.
Can I stamp a password-protected PDF or one with editing restricted?
Yes. A password-protected PDF opens once you enter its open password. If the author has restricted changing the content, you cannot stamp it until you enter the permissions password. This tool does not guess passwords, so if you do not know the permissions password, ask the person who created the PDF. Saving invalidates any electronic signature in the PDF.
Help us improve the service
If a conversion fails, sending us the circumstances helps us track down the cause. Knowing which devices and formats fail most often, and how long processing takes, lets us revise the supported formats and fix the bugs behind them. If you don't mind, leaving this on is a real help.
What is sent
- The tool you used and the settings you chose (output format, quality, etc.)
- Your device specs (GPU, memory, core count)
- The input format with a rough size
- How many files succeeded or failed and how long it took
- The error type and details when something fails
What is never sent
- The files themselves and file names
- The text in PDFs, the text you rewrote or redacted, passwords, font names and the page ranges you enter
- IP addresses
The data goes only to this site's own server, never to a third-party service.
For the full list, including the details each tool sends, see “Processing statistics” in the privacy policy.
Details sent by this tool (counts, times, kinds and yes/no only)
In addition to “What is sent”, this tool sends the following details.
- PDF tools (all)
- The page count range, whether editing is restricted, whether a permissions password was entered, and whether the PDF is signed or encrypted.
- PDF electronic seal
- When a PDF is saved: the numbers of inputs and outputs, the range of how many pages were stamped, the range of the number of seals, and whether the original protection was reapplied. Names and positions are never sent. Saving a PNG sends no statistics.