Online Signature Color Changer – Convert Ink to Any Color

This free online Signature Color Changer lets you easily convert your handwritten signature from blue ink to black or any color. Everything is processed securely in your browser — adjust tolerance, clean paper background, preview results, and download your new digital signature in PNG or JPEG.

🔒 100% private: Runs entirely in your browser—no uploads, no tracking.

Load signature image

Original

Processed

Color settings

From color (current ink) Pick from image

To color (new ink)

Color tolerance:

35

Higher catches more nearby hues/saturation around the chosen color.

Background & output

White background threshold:

245

Pixels lighter than this are treated as paper background.

Make white background transparent

Output scale Original (100%)75%50%25%

Output format PNG (lossless)JPEG

Process Reset Download

FAQ

Can I change from any color to any other color?

Yes. Pick the source ink (or use the eyedropper) and choose any target color. The tool preserves natural stroke shading.

How do I pick the exact ink color from my image?

Click “Pick from image” (supported in most modern browsers). If not available, approximate with the color picker and increase tolerance slightly.

What does color tolerance do?

It widens the hue/saturation range around your chosen color. Higher values catch more similar tones; too high may recolor nearby paper shadows.

How do I remove the paper background or make it transparent?

Enable “Make white background transparent”, then raise/lower the white threshold until the paper disappears while strokes remain.

Why is the preview hidden before I load a file?

To avoid a broken image icon and layout shift. The preview appears as soon as a valid image is loaded.

Which formats are supported and which should I choose?

PNG, JPG/JPEG, and WebP are accepted. For crisp edges or transparency, export PNG. Use JPEG if you need a smaller file and set the quality.

Does this reduce image quality?

PNG exports are lossless. JPEG uses your selected quality (default 92). If you need the sharpest edges, choose PNG.

Is this private and secure?

Yes. Everything runs locally in your browser — no uploads, no tracking.

Tips if edges don’t fully change color

Lower the white threshold slightly, then increase color tolerance in small steps. If paper starts changing color, reduce tolerance a little.

Related tools to speed up your workflow

Create a fresh digital signature with our Online Signature Maker.

Legal note about altering signature color

Color changes are cosmetic. Always follow your recipient’s requirements (e.g., black ink only). Keep your original file for reference.