Photograph your signature
Sign on plain white or light paper, in even lighting, and photograph or scan it.
Remove a Signature's Background
Photograph or scan a signature on paper, and get back a transparent PNG ready to drop onto any document.
Transparent signature
Drag the sensitivity slider until only the ink remains.
How to remove a signature's background
Turns a photo of ink on paper into a clean, transparent PNG using straightforward brightness detection.
Adjust sensitivity
The slider controls how bright a pixel must be before it's treated as background.
Download the PNG
Save a transparent-background signature, ready to place on any document.
Private browser-based background removal
FreNiMi Tools reads the image's pixels directly in your browser and makes bright, paper-colored pixels transparent while keeping darker ink pixels intact. Nothing is sent to FreNiMi for processing, and no account is required.
This works by brightness, not subject recognition — it's built for high-contrast ink-on-paper signatures, not general photo backgrounds with busy scenes or similar-toned subjects.
Supported files and limitations
- JPG, PNG, and WebP images.
- Best results with a clear signature on plain, evenly lit paper.
- Colored paper, shadows, or low contrast between ink and paper reduce accuracy.
Frequently asked questions
Is my photo uploaded or stored?
No. Your browser reads the image and processes every pixel locally, then you download the result directly to your device.
Why does part of my signature disappear?
If the sensitivity is too high, faint ink strokes can be treated as background. Lower the slider until the full signature reappears.
Can I use this to remove backgrounds from regular photos?
Not reliably. This tool works by brightness, so it's built for high-contrast ink-on-paper signatures, not photos with complex scenes.
What format is the output?
A PNG with a transparent background, which you can place directly onto a PDF using Sign PDF.
Why do the edges of my signature look smooth instead of jagged?
Pixels near the brightness cutoff are given partial transparency instead of an all-or-nothing cut, which softens the edge instead of leaving a harsh, pixelated outline.