Crie uma Assinatura Transparente

Transforme uma digitalização ou foto da sua assinatura manuscrita num PNG transparente e limpo para contratos e documentos.

Largue as suas imagens aqui

ou escolha ficheiros do seu dispositivo

Cole com CtrlV

JPG · PNG · WEBP · Vários ficheiros · Resolução total

As suas imagens nunca saem do seu dispositivo

Photo with the background removed — Arraste o cursor — resultados reais, nada é carregado

The same photo on its original background — Arraste o cursor — resultados reais, nada é carregado

Assine uma folha de papel em branco, fotografe ou digitalize, e largue-a aqui. A IA remove o fundo de papel e deixa apenas a tinta como um PNG transparente que pode colocar em qualquer PDF ou documento.

Como todo o processo corre no seu navegador, a sua assinatura — uma informação sensível — nunca é carregada para um servidor.

Porquê usar

Pronto para documentos

Obtenha tinta transparente que pode colocar diretamente em PDFs, contratos e cartas.

Mantido privado

A sua assinatura nunca sai do seu dispositivo — nada é enviado para lado nenhum.

Isolamento limpo

Separa a tinta da textura do papel e das sombras, com um pincel para refinar o resultado.

Como funciona

Três passos, no seu navegador. Sem conta, sem carregamentos.

1. Adicione a sua imagem

Arraste e largue, procure ou cole — também funciona em lote.
2. A IA remove o fundo

Corre no seu dispositivo em segundos — nada é carregado.
3. Descarregue

PNG transparente, ou escolha uma cor de fundo. Qualidade total.

Turning a signed page into a usable signature

Sign on unlined white paper

The quality of a digital signature is set before you photograph it. Use a black or dark blue pen with a reasonably thick stroke on plain, unlined white paper — ruled or squared paper leaves lines that have to be cleaned up individually.

Sign larger than usual. A big signature photographed and scaled down looks crisp; a small one photographed and enlarged looks soft and pixellated, and the thin parts of the stroke break up.

Photograph it flat and evenly lit

Shoot from directly above with the camera parallel to the paper. Photographing at an angle skews the signature into a trapezoid, and the correction never looks quite right.

Even light matters more here than anywhere else, because a shadow across the page becomes a grey wash across the cut-out. Daylight from a window with the paper away from your own shadow is ideal; overhead room lighting with you leaning over the page is the usual cause of a muddy result.

What a clean signature file looks like

The result should be the ink alone on transparency, with no paper tone and no grey box, so it can be placed over any document background — including the coloured or watermarked pages many contracts use.

Check the thin strokes at full zoom. The delicate parts of a signature, where the pen lifted, are exactly what an over-aggressive cut-out removes, and a signature missing its tapering strokes looks visibly altered.

Keep the file private

A signature is one of the few images where the file itself is a security concern: anyone holding a clean transparent PNG of your signature can place it on any document.

That is a direct argument for processing it on your own device rather than uploading it to a service, and for being deliberate about where the finished file is stored and who it is sent to. Strip metadata before sharing, and avoid emailing the transparent master when a flattened copy inside the finished document would do.

Perguntas frequentes

How do I get a clean digital signature?

Sign larger than usual with a dark, thick pen on plain unlined white paper, photograph it from directly above under even light, then remove the background. The result is the ink alone on transparency.

Is it safe to make a signature image online?

It depends entirely on whether the file is uploaded. Here the processing runs in your browser and the image never leaves your device, which matters more for a signature than for almost any other image.

What format should I save a signature in?

PNG, so the transparency is preserved and it can be placed over any document background. A JPG will arrive with a white box around it.

Why do the thin parts of my signature disappear?

The delicate strokes where the pen lifted are the first thing an over-aggressive cut-out removes. Sign with a thicker pen, photograph at higher resolution, and check the fine strokes at full zoom.

Remover o fundo de outra coisa

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Pronto para experimentar?

É gratuito, ilimitado e totalmente privado.

Remover um fundo agora

Exporte aqui e continue a editar ali — a sua imagem acompanha-o, sem novo carregamento.