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Signature Edge Cleaner

Online PNG Maker

World's simplest online signature edge cleaner. Just import your digital signature in the editor on the left, set the depth of edge cleaning and smoothing, and you'll instantly get a signature with clean edges on the right. Free, quick, and very powerful. Import a signature – refine its edges. Created with love by team Browserling.

Signature Edge Cleaner

Online PNG Maker

World's simplest online signature edge cleaner. Just import your digital signature in the editor on the left, set the depth of edge cleaning and smoothing, and you'll instantly get a signature with clean edges on the right. Free, quick, and very powerful. Import a signature – refine its edges. Created with love by team Browserling.

᠎᠎᠎          Tool Options

Edge Smoothing Depth

How many pixels to smooth
(make semi-transparent) at
the edge of a signature?

Edge Cleaning Depth

How many pixels to clean up
(make transparent) at the
edge of a signature?

Deep Edge Cleaning

Clean up the pixels in the narrow
crevices of the digital signature
using the color matching method.
Color similarity search method.
Color threshold of removed pixels.
Depth of removed pixels.

What Is a Signature Edge Cleaner?

This browser-based utility makes the edges of a digital signature smooth. It allows you to quickly get rid of ugly pixels around the ink that are often left over when a signature is extracted from a scan or photo. The program works with transparent PNG signatures only and if your digital signature still has an opaque background, you can remove it using our Transparent PNG Signature Maker program. If the background of the signature is not a solid color, then you can extract the signature by its color via our Extract Object By Color tool. Once you load a signature in the input area, the utility finds all signature ink pixels that are in contact with the transparent background pixels and makes them transparent or semi-transparent. To make pixels at the edges transparent, you need to increase the edge cleaning depth in the options using the removal method. To make pixels semi-transparent, you need to increase the edge smoothing depth in the options. For example, if you set the edge cleaning depth to 2 pixels, every two pixels along the edge of the signature will be made transparent. If you set the edge smoothing depth to 2 pixels, every two pixels along the edge of the signature will be made semi-transparent. If, after applying these two cleaning methods, individual pixels of the previous background remain in the gaps, you can eliminate them using the deep edge cleaning option. This option finds and cleans pixels in narrow gaps, using two parameters: color threshold and cleaning depth. The color threshold indicates the number of shades (in percentage) that the program can remove. To search for all shades within the threshold, the program can use one of two methods: "Minimum Color Difference" (based on the Euclidean algorithm for finding RGB differences) and "Most Similar Color" (based on the CIE76 Delta E algorithm for finding LAB color differences). The cleaning depth indicates the number of pixels deep into the gaps that the program can remove. Png-abulous!

What Is a Signature Edge Cleaner?

This browser-based utility makes the edges of a digital signature smooth. It allows you to quickly get rid of ugly pixels around the ink that are often left over when a signature is extracted from a scan or photo. The program works with transparent PNG signatures only and if your digital signature still has an opaque background, you can remove it using our Transparent PNG Signature Maker program. If the background of the signature is not a solid color, then you can extract the signature by its color via our Extract Object By Color tool. Once you load a signature in the input area, the utility finds all signature ink pixels that are in contact with the transparent background pixels and makes them transparent or semi-transparent. To make pixels at the edges transparent, you need to increase the edge cleaning depth in the options using the removal method. To make pixels semi-transparent, you need to increase the edge smoothing depth in the options. For example, if you set the edge cleaning depth to 2 pixels, every two pixels along the edge of the signature will be made transparent. If you set the edge smoothing depth to 2 pixels, every two pixels along the edge of the signature will be made semi-transparent. If, after applying these two cleaning methods, individual pixels of the previous background remain in the gaps, you can eliminate them using the deep edge cleaning option. This option finds and cleans pixels in narrow gaps, using two parameters: color threshold and cleaning depth. The color threshold indicates the number of shades (in percentage) that the program can remove. To search for all shades within the threshold, the program can use one of two methods: "Minimum Color Difference" (based on the Euclidean algorithm for finding RGB differences) and "Most Similar Color" (based on the CIE76 Delta E algorithm for finding LAB color differences). The cleaning depth indicates the number of pixels deep into the gaps that the program can remove. Png-abulous!


Signature Edge Cleaner Examples

Click to try!
click me

Freddie Mercury's Signature

In this example, we clean up the edges of Freddie Mercury's digital signature. The signature originally had a red background but it was poorly removed and a lot of tiny red pixels from the original background formed around it. To make the signature neat and usable in digital documents, we apply the edge refinement algorithm with pixel removal in a radius of 1 pixel, and pixel smoothing in a radius of 1 pixel. Now all red pixels are gone. (Source: Wikipedia.)

Required options
These options will be used automatically if you select this example.
How many pixels to smooth
(make semi-transparent) at
the edge of a signature?
How many pixels to clean up
(make transparent) at the
edge of a signature?
Clean up the pixels in the narrow
crevices of the digital signature
using the color matching method.
Color threshold of removed pixels.
Depth of removed pixels.
click me

Bill Gates's Signature

In this example, we upload Bill Gates's signature, which has a bright green stroke around it. To remove the stroke, we set the edge cleaning depth using the removal method to 2 pixels and also activate the deep cleaning mode with a color threshold of 40% (the "Most Similar Color" method) and a cleaning depth of 10 pixels. As a result, we get a clean signature with black ink on the output. (Source: Wikipedia.)

Required options
These options will be used automatically if you select this example.
How many pixels to smooth
(make semi-transparent) at
the edge of a signature?
How many pixels to clean up
(make transparent) at the
edge of a signature?
Clean up the pixels in the narrow
crevices of the digital signature
using the color matching method.
Color similarity search method.
Color threshold of removed pixels.
Depth of removed pixels.
click me

Alfred Hitchcock's Signature

This example applies the signature edge-cleaning algorithm on Alfred Hitchcock's signature. The signature was exported from a JPG photo and it has a lot of JPG artifacts around it, which makes it very ugly. The algorithm finds individual pixels that are surrounded by a transparent background and makes them invisible. It uses simple pixel removal in a radius of 1 pixel as well as deep pixel cleaning in gaps up to 8 pixels with a color threshold of 70% (the "Minimum Color Difference" method). As a result, the blue noisy pixels disappear. (Source: Wikipedia.)

Required options
These options will be used automatically if you select this example.
How many pixels to smooth
(make semi-transparent) at
the edge of a signature?
How many pixels to clean up
(make transparent) at the
edge of a signature?
Clean up the pixels in the narrow
crevices of the digital signature
using the color matching method.
Color similarity search method.
Color threshold of removed pixels.
Depth of removed pixels.

All PNG Tools

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Quickly remove the green screen background from a PNG.
Quickly convert a JPG signature to a transparent PNG signature.
Quickly create a PNG signature with a transparent background.
Quickly change the color of a PNG signature.
Quickly improve the quality of a digital signature.
Quickly convert a colorful signature to just black-and-white.
Quickly rotate a digital signature and make it horizontal.
Quickly crop a digital signature from a PNG.
Quickly resize a digital signature.
Quickly clean up pixels around digital signature edges.
Quickly fill transparent areas of a digital signature.
Quickly convert a thin signature to a thick signature.
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Quickly add an outline around objects in a PNG.
Quickly remove a stroke from around objects in a PNG.
Quickly encircle objects within a PNG with an outline.
Quickly clear PNG elements from the encircled outline.
Quickly add a glowing effect to PNG image objects.
Quickly add a transparent or opaque padding to a PNG.
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Coming Soon

These PNG tools are on the way!
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Convert PNG to TIFF

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Convert TIFF to PNG

Convert a TIFF image to a PNG image.

Convert PNG to PIK

Convert a PNG image to a PIK image.

Convert PIK to PNG

Convert a PIK image to a PNG image.

Convert PNG to PPM

Convert a PNG image to a PPM image.

Convert PPM to PNG

Convert a PPM image to a PNG image.

Convert PNG to BPG

Convert a PNG image to a BPG image.

Convert BPG to PNG

Convert a BPG image to a PNG image.

Convert PNG to FLIF

Convert a PNG image to a FLIF image.

Convert FLIF to PNG

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Convert PDN to PNG

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Convert PSD to PNG

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Convert PNG to SVG

Convert a PNG image to an SVG image.

Convert SVG to PNG

Convert an SVG file to a PNG image.

Convert PNG to PDF

Convert a PNG image to an PDF document.

Convert PDF to PNG

Convert a PDF document to a PNG image (or multiple images).

Convert PNG to EPS

Convert a PNG image to an EPS file.

Convert EPS to PNG

Convert an EPS file to a PNG image (or multiple images).

Convert PNG to JFIF

Convert a PNG image to a JFIF image.

Convert JFIF to PNG

Convert a JFIF image to a PNG image.

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Convert RGB to PNG

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Convert a PNG image to raw BGR values.

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Convert BGR values to a PNG image.

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Convert a PNG image to raw RGBA values.

Convert RGBA to PNG

Convert RGBA values to a PNG image.

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Convert a PNG image to raw BGRA values.

Convert BGRA to PNG

Convert BGRA values to a PNG image.

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APNG Checker

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Randomize PNG Pixels

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Sort PNG Pixels

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Split a PNG

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Create a PNG Mosaic

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Triangulate a PNG

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Add Vignette Effect to a PNG

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Add Kaleidoscope Effect to a PNG

Create multiple reflections of a PNG.

Add Bayer Filter to a PNG

Apply a Bayer filter on a PNG.

Add Night Vision Effect to a PNG

Make a PNG look like it was taken via night vision goggles.

Add Spherical Effect to a PNG

Make a PNG look like it's spherical.

Apply Mobius Transform on a PNG

Run a PNG through the Mobius Transform.

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Convert between RGB, CMYK, HSV, and HSL color spaces.

Convert PNG Bit Depth

Convert between 8-bit, 16-bit, 24-bit, and 32-bit PNG depths.

Remove Dithering from a PNG

Remove dithering from a PNG image.

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Convert a PNG to an ASCII art image.

Create PNG from ASCII Art

Convert ASCII art to a PNG image.

Create ANSI Art from PNG

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Create PNG from ANSI Art

Convert ANSI art to a PNG image.

Create Braille Art from PNG

Convert a PNG to a Braille art image.

Create PNG from Braille Art

Convert Braille art to a PNG image.

Convert Bytes to PNG

Create a PNG image from the given bytes.

Convert PNG to Bytes

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Enhance a PNG

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Slice a PNG

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Generate All-color PNG

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Extract Text from a PNG

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Create a 3D PNG

Given any 2D PNG, add 3rd dimension to it.

Remove Text from a PNG

Quickly erase text (labels, captions) from a PNG.

Remove a Watermark from a PNG

Quickly delete a watermark from a PNG.

Fix a Broken PNG

Salvage a PNG that has bad bytes in it and doesn't open.

Hide Data in a PNG

Conceal a secret message in a PNG image.

Change PNG Metadata

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Erase PNG Metadata

Delete meta data from a PNG picture.

Validate PNG

Check if the given file is a valid PNG without errors.


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Created with love by

We're Browserling — a friendly and fun cross-browser testing company powered by alien technology. At Browserling we love to make people's lives easier, so we created this collection of online PNG tools. We created the simplest possible user interface for our tools and they are now used by millions of users every month. Behind the scenes, our online PNG tools are actually powered by our web developer tools that we created over the last couple of years. Check them out!

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