How to Make a Company Stamp or Seal Transparent
A transparent stamp sits on an invoice or letterhead with no white box covering the text behind it. This guide shows how to make a clean PNG from a rubber stamp or round company seal, and where a pasted image stops being enough. Rules were checked in November 2026.
Want to do this now? Try the Signature background remover.
In this guide
- 1. Stamps need more care than signatures
- 2. Make sure you have the authority to use the seal
- 3. Start with the cleanest source you can get
- 4. Make the stamp transparent
- 5. What to inspect on a stamp
- 6. Size and place the stamp on an invoice
- 7. A pasted stamp is not a digital signature
- 8. Look after the file
- 9. Frequently asked questions
Stamps need more care than signatures
The tool to start with is our signature background remover, which is set up for ink on paper and is free, with no signup and no watermark. It takes a JPG, PNG or WebP up to 10 MB and gives back a transparent PNG at the same resolution.
If you only need your handwritten signature, our signature guide covers that. Stamps and seals have their own problems. A round seal has paper trapped inside its rings and letters, which automatic removal can treat as part of the object. The lettering around the edge is tiny. The ink is often faded blue or violet, and a rubber stamp rarely prints evenly.
This guide deals with those differences. Before the steps, check that you are allowed to use the seal.
Make sure you have the authority to use the seal
A company's stamp or seal speaks for the company, so only someone authorised should use it or copy it. That applies to the digital version as well. If you are not a director, partner or proprietor, get written approval from the person who is, and ask who will keep the file.
For Indian companies, a common seal has been optional since the Companies (Amendment) Act, 2015, which removed it from section 9 of the Companies Act, 2013. Where a company has no seal, section 22 as amended provides for authorisation by two directors, or by a director and the company secretary. A rubber stamp saying For Sharma Traders, Authorised Signatory does not create authority that the person using it does not have.
Use this guide only for your own organisation's stamp. Making a digital copy of another company's stamp, or one belonging to a government office, a notary or a bank, can be a criminal offence.
Start with the cleanest source you can get
Ask for the original artwork. The shop that made your stamp may still have the design file. If you can get it, and especially if it is a vector file, you may be able to export a sharp transparent PNG directly and skip the rest of this guide.
Otherwise, make a fresh impression. Use a freshly inked pad on plain white paper with nothing else on the page. Do not lift a stamp from an old invoice, where it overlaps printed text and a signature. The tool cannot separate those from the ink. Stamp five or six times and pick the most even one.
Scan it if you can. A flatbed scan at 300 to 600 dpi gives even light and no shadow. If you only have a phone, hold it flat and parallel to the paper in daylight, avoid your own shadow, and turn the flash off to prevent a bright patch. Crop close to the stamp with a small margin.
Embossed seals are the hard case. A dry seal pressed into paper has no ink, only faint shadows, so a scan gives you very little to separate. Getting the artwork from the maker, or having the design redrawn, will work better.
Make the stamp transparent
- Open the signature background remover and upload your scan. If it is over 10 MB, reduce the size first. Keep the original.
- Wait for the result, then keep the background set to none so that the paper disappears.
- Look at the preview on both a light and a dark background. Zoom in before you decide it is fine.
- Download the transparent PNG. It comes back at the resolution you uploaded.
The general transparent background tool is the same idea if you are processing a logo or something other than ink on paper.
What to inspect on a stamp
Paper inside the ring. Look at the centre of a round seal and the band between the two rings. If they stay white while the outside goes clear, the paper was treated as part of the object. A sharper scan with stronger contrast may fix this.
Small enclosed letters. Check the holes in A, O, R, 8 and Devanagari characters such as ब and ठ. Paper left inside them looks like white dots on a coloured page.
Faint strokes. Compare the result against your scan letter by letter, particularly the GSTIN, CIN or registration number if the stamp shows one. A missing digit makes the stamp wrong, and a retouched digit means it no longer matches the original.
Coloured fringes. A pale edge around the ink shows up on tinted letterheads. Test on the actual letterhead colour.
If automatic removal keeps paper inside the seal, GIMP is a free alternative for this particular job. Its Colors > Color to Alpha command with white selected turns paper transparent wherever it appears, including inside letters. Clean up any marks left on the paper first, because that command treats colours rather than objects.
Size and place the stamp on an invoice
To print at true size, work from the physical size of the stamp. A 40 mm round stamp at 300 dpi is about 472 pixels across (40 / 25.4 x 300). If your PNG is larger than that, it will still print sharply, and you can set its size in the document.
In Microsoft Word, use Insert > Pictures, open Layout Options and choose In Front of Text so the stamp can sit over the signature block. In Excel, use Insert > Pictures and drag it into place over the cells. In Google Docs, use Insert > Image and choose In front of text. Set the height to the stamp's real measurement so that it does not look oversized.
To use the file as a digital stamp for invoice software, look for a slot for a logo or signature image, try the PNG there, and check the generated invoice before using it with customers. Some software flattens transparency or resizes the image. If a form asks for JPG or for a plain background, use the editor's solid background with white selected, or see our white background tool. A JPG cannot hold transparency.
If the stamp you need is inside a PDF rather than on paper, our PDF image guide explains how to get the image out, though a fresh impression will almost always be cleaner.
A pasted stamp is not a digital signature
A transparent PNG is a picture, and a pasted image of a stamp may not satisfy legal or e-sign requirements. It does not prove who placed it or when, and it does not show if the document was changed afterwards. Anyone with the file can paste it on anything. Our tool edits an image and verifies nothing, so treat the file as visual only.
GST invoices. Rule 46 of the CGST Rules on the CBIC site lists the “signature or digital signature of the supplier or his authorised representative” as a required item on a tax invoice. The rule does not mention a stamp or seal, so a stamp image does not replace that signature. A proviso removes the signature requirement for an electronic invoice issued in line with the Information Technology Act, 2000. Ask your CA how this applies to your invoices.
Contracts and filings. Under the Information Technology Act, 2000, sections 3A and 5 give legal recognition to electronic signatures that use a reliable technique listed in the Second Schedule. Adobe’s summary of Indian e-signature law (last updated July 2026) notes that those carry a presumption of validity, that an agreement is not invalid solely because it used a non-recognised e-signature, that digital signatures are preferred for filings with the Ministry of Corporate Affairs and for GST, and that some local authorities still insist on physical documents and wet signatures. A pasted image sits at the weak end of that scale.
Banks, tenders and government offices. These often set their own rules and may ask for a physical stamp, a certificate-based digital signature, or a particular e-sign service. Check with the receiving party before you send anything that matters.
This section is general information from the sources linked above and is not legal advice. For anything with money or liability attached, ask your company secretary, CA or lawyer.
Look after the file
A clean transparent stamp is easy to misuse, so treat it as you would the physical stamp in the office drawer. Keep it in a folder only authorised people can open, away from shared drives and WhatsApp groups. Do not send the raw PNG to vendors or customers. Send the finished PDF.
A PDF does not lock the image in, since someone can still screenshot it and cut it out, but it does mean that you are not handing out the clean master. If someone with access leaves the company, consider changing the design on your next stamp and replacing the file.
Keep a short note of who approved the file and when. That record helps if an invoice carrying the stamp is ever questioned.
Frequently asked questions
Is a transparent stamp legally valid on an invoice?
A stamp image alone is not a signature. Rule 46 of the CGST Rules requires a signature or digital signature on a tax invoice, with an exception for electronic invoices issued under the IT Act, 2000. Ask your CA what applies to your invoices.
Can I use a digital stamp for an invoice?
You can place one for appearance if you are authorised to use the stamp, and alongside whatever signature the invoice needs. It does not replace a signature or digital signature. Keep the file restricted to authorised people.
Does a company need a common seal in India?
The Companies (Amendment) Act, 2015 made the common seal optional for companies under the Companies Act, 2013. Where there is no seal, section 22 provides for authorisation by two directors, or a director and the company secretary. Check your own articles and ask your company secretary.
Why does white remain inside my round seal?
Automatic removal can treat the paper inside a ring as part of the object. Try a sharper scan with stronger contrast. If that fails, GIMP's Color to Alpha command with white selected turns paper transparent wherever it appears.
Which file format should a company seal PNG use?
Use PNG when you need transparency, because JPG cannot store it. If a form requires JPG, use a solid white background instead.
Can I copy a stamp from an old document?
Avoid it. The stamp usually overlaps printed text and signatures, which cannot be separated cleanly, and you should only reproduce a stamp your organisation has authorised you to use. A fresh impression on plain paper is cleaner.