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Remove gray paper shadows and whiten background from photos of handwritten signatures online for free. Sharpen ink lines.
Transform shadowy smartphone snapshots of paper signatures into crisp, scan-quality digital graphics. The intelligent threshold engine eliminates yellowish paper background tints, cleans shadows, and extracts sharp dark ink strokes ready for forms and PDFs. Read our guide on how to make a clean digital signature online.
How to Use
JPG or PNG from your camera roll — no scanner required.
Otsu detection separates paper from ink; switch to manual if edges look eaten.
Trims margins so the signature fills the export box cleanly.
SSC or IBPS dimensions with optional KB compression.
SSC Preset
200 × 75 px (≤20 KB)
IBPS / SBI
140 × 60 px (≤10 KB)
Use the JPG directly, or open the photo+signature merger for a combined upload.
Our smart threshold algorithm analyzes the contrast between ink strokes and paper texture. It eliminates dark shadows, yellow lighting tints, and paper creases, leaving crisp black or blue ink on pure white background.
Yes! Toggle 'Transparent PNG' to extract only the ink strokes without any background, perfect for inserting directly onto PDF documents or contracts.
Yes. The auto-trim feature detects ink boundaries and crops out excess white margins so your signature fills recruitment portal boxes without distortion.
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