How is this different from the Image to Stamp Converter?

It's the exact same underlying composition (duotone, optional circular crop, double-ring border); this tool's page is simply framed specifically for PNG uploads.

Does it preserve transparency in the source PNG?

The duotone step maps luminance to a shadow/highlight gradient using the source pixels' RGB channels; existing transparency in the source is not specifically preserved through the duotone step, since the goal is a solid-ink stamp look rather than a transparency-preserving filter.

Can I choose the ink color and shape?

Yes, both are configurable, defaulting to a red ink color and round shape like this category's other stamp converters.

Is the output always square when using the round shape?

Yes, choosing round crops the image to a centered square before applying the circular mask, matching the round-crop behavior of this category's other round-shape tools.

PNG to Stamp Converter - Turn a PNG Image into a Stamp-Styled PNG

Overview

Introduction

This tool converts an uploaded PNG into a rubber-stamp-styled graphic: a single flat ink color, optionally cropped to a circle, framed by a classic double-ring border.

It's the PNG-framed entry point to this category's shared image-to-stamp composition, the same one the JPG variant of this tool also uses after its own format-specific decode step.

What Is PNG to Stamp Converter?

A near-direct pass-through to convertImageToStamp, the shared duotone/crop/ring composer this batch of stamp-converter tools reuses.

Since PNG pixels need no extra format-specific preparation beyond the pixel-buffer validation that composer already performs, this tool adds no logic of its own beyond naming.

How PNG to Stamp Converter Works

Your uploaded PNG is decoded into a pixel buffer by the shared upload panel, the same decode path every pixel-editing tool in this category uses.

That buffer is duotoned into your chosen ink color, optionally cropped to a circle, and framed with a double-ring border.

When To Use PNG to Stamp Converter

Use it whenever your source image is already a PNG and you want a stamp-styled version of it.

It's useful for turning a logo, icon, or graphic saved as a PNG into a stamp-like asset without leaving the browser.

Often used alongside Image to Stamp Converter, JPG to Stamp Converter and Custom Stamp Design Creator.

Features

Advantages

No extra format-specific decode step beyond standard PNG loading.
Reuses the same tested duotone/crop/ring composition as the JPG variant of this tool.
Runs entirely client-side, producing a downloadable PNG.

Limitations

The duotone effect is a luminance-based approximation, not a true halftone or engraving effect, so very colorful images may lose detail that relied on hue rather than brightness.
The round crop always centers a square crop of the image, so off-center subjects in a wide or tall image may get cropped out.

Examples

Convert a PNG icon to a round red stamp

Input

shape="round", inkColor=red

Output

A square PNG with the icon duotoned red and framed by a circular double ring

The duotone step converts full-color art into a flat single-ink look before the circular crop and ring are applied.

Convert a wide PNG banner to a rectangular stamp

Input

shape="rectangular"

Output

A PNG matching the banner's original aspect ratio, duotoned and ring-bordered

Rectangular mode skips the circular crop, preserving the original proportions.

Best Practices & Notes

Best Practices

Use high-contrast source images for the clearest duotone result.
Choose the round shape for logos or icons that are already roughly centered and square.

Developer Notes

The lib function is a one-line pass-through to convertImageToStamp (the shared composer), included as its own file/slug because the JPG variant of this tool needs its own decode-validation step first, while PNG input needs none — a direct example of this batch's 'reuse, don't reimplement' guidance.

PNG to Stamp Converter Use Cases

Turning a PNG logo into a stamped badge graphic
Creating a stylized single-color version of a PNG image for a mockup
Prototyping a stamp-effect treatment for an existing PNG asset

Common Mistakes

Uploading a very colorful image and expecting all its hues preserved — duotoning intentionally reduces it to a single ink color based on brightness.
Choosing round shape for a very wide or tall image and being surprised by how much gets cropped out.

Tips

Try both shapes on the same image to compare the circular-crop and full-aspect-ratio results.
Pair with the PNG Color Extractor tool first if you want to pick an ink color that matches a dominant color in your source image.

PNG to Stamp Converter