How do I sign every page and add a “certified true copy” stamp?
Choose the PDF, create or pick a signature (draw, type or upload a picture), then drag it into place once on the page 1 preview. The tool draws it at the same relative spot on every page you select, including rotated or cropped pages. Apply it to all pages, odd pages, even pages or a range such as 1-3,5. Turn on the certified-copy block to add the words “สำเนาถูกต้อง” above the signature and a name and date (Buddhist Era by default) below it, as one block.
Is this a legally binding signature?
It places a picture of a signature and a stamp on the PDF page. It is a visual signature, not a certificate-based digital signature: it does not verify who signed, adds no trusted timestamp and cannot show whether the file was changed afterwards. Thailand’s Electronic Transactions Act recognises electronic signatures under conditions set by the law, but some agencies, banks and counterparties require a handwritten signature or a certified digital signature. Check with the receiving party before you send, and take legal advice for important documents.
Is my PDF uploaded anywhere?
No. Opening pages, placing stamps, signatures, watermarks and page numbers, and building the new PDF all run in your browser. The only thing requested from the server is the Thai font file that belongs to this site; none of your file, signature or text is sent. The result is a new file with everything drawn into the page content rather than added as annotations, so it prints and opens the same in every program, and the original text stays selectable.
What page-number options are there?
Six positions (left, centre or right, top or bottom); formats 1, 1/10, “หน้า 1 จาก 10” and “Page 1 of 10”; optional Thai numerals (๑ ๒ ๓); a start number; and skipping the first page or cover. With the first page skipped, page 2 gets the start number, for example 1/9. Limiting numbers to some pages only hides the label on the others; it does not renumber.
How do the Thai watermark and stamps work?
Type your own watermark, for example “ใช้สำหรับสมัครงานเท่านั้น” (for job applications only). Choose diagonal or horizontal, colour, size and opacity, and optionally repeat it across the page. Ready stamps are certified true copy, PAID, APPROVED, RECEIVED, ORIGINAL, COPY and VOID, or type your own, in red, blue or green with a rounded or oval border and an optional Buddhist Era or Gregorian date line. All are vector shapes with the Noto Sans Thai font embedded, and vowels and tone marks stack correctly, for example ที่ นั้น ตั้ง.
What are the limits, and can I use a password-protected PDF?
One PDF at a time, up to 10 MB and 200 pages, with one stamp, one signature block, one watermark and one page-number style per run. A password-protected or encrypted PDF is refused; remove the password first with our Protect & Unlock PDF tool, which needs the original password. If the file already has a digital signature, saving a new copy invalidates it. Characters the font lacks, such as emoji, print as an empty box and you get a warning.
Does it cost anything or need an account?
No. Signatures, stamps, watermarks and page numbers work in full with no account and no watermark of ours. iToolers Pro only adds saving signatures on your device for reuse (up to 5, shared with the Fill & Sign PDF tool), saving custom stamps (up to 10), and processing several PDFs with the same settings (up to 10 files) into a ZIP. Everything is saved and processed on your device.