Handwritten Signature to Transparent PNG
Photo taken with uneven lighting or shadows? Crop your signature box, let our adaptive algorithm flatten shadows, and export a clean transparent PNG ready for Word & PDF contracts.
Click to upload or drag signature photo here
Supports phone photos (PNG, JPG, WebP) or paste directly from clipboard with Ctrl+V
Adaptive local illumination flattens dark phone shadows.
Slide right if strokes are faint; slide left if noise appears.
Recolors your signature ink for formal contract standards.
Drag inside the box to move it anywhere. Drag the 8 edge and corner handles to fine-tune width and height with millimeter precision.
Choose between Fine (6px), Medium (14px), or Thick (28px). Hover with a red ring cursor to cleanly erase shadows next to letters without wiping out your name.
The exported PNG is fully transparent. In Word, WPS, or Adobe Acrobat, click "Insert Image" to overlay your signature smoothly on contract lines without blocking text.
Frequently Asked Questions
Why can it remove heavy phone shadows across white paper? ▼
Standard tools only look at absolute brightness, mistaking dark shadows for content. QuickSign analyzes the relative local contrast between ink and adjacent paper. Even in deep shadows, ink strokes remain darker than the shaded paper, allowing division flattening to completely remove shadows.
Is my signature uploaded or stored anywhere? ▼
Never. All image processing takes place directly in your browser canvas using client-side JavaScript. The tool works 100% offline without sending any bytes to external servers.
How do I place the exported signature into PDF contracts? ▼
Open your PDF in Adobe Acrobat, Apple Preview, or Chrome. Go to Tools > Sign or Add Image, select the downloaded PNG, and place it directly over the signature line. The transparent alpha channel ensures crisp display without white background blocks.