Meet signature capture ✍️ — a clean, lightweight canvas for collecting legally usable e-signatures inside your app. Users draw with smooth, inky strokes, get an instant thumbnail preview 🖼️, and export with a single tap ⬇️ — perfect for forms, checkouts, and approvals on mobile & web.

Functionality ⚙️

• 🖊️ Smooth freehand ink with anti-aliasing & stroke smoothing

• 🎚️ Adjustable pen size & color; optional pressure/stylus support

• ⬇️ One-tap export: PNG/JPEG/SVG + base64 string

• 🖼️ Live thumbnail/preview of the last saved signature

• ✂️ Auto-trim & smart crop (remove extra whitespace)

• 🪟 Transparent or solid background, optional watermark & timestamp

• ↩️↪️ Undo/redo, clear, and empty-signature validation

• 🖥️ High-DPI rendering that scales with device pixel ratio

• 📄 Optional background image (sign over forms/photos)

• ☁️ Local save or upload via callbacks (storage/DB)

• 🎨 Theming: rounded corners, shadows, FAB position, colors

• ♿ Accessibility: large hit targets, keyboard hints, screen-reader labels

• 📴 Works offline; responsive on phones, tablets, and desktop

Use cases 💼

• 📃 Contracts, NDAs, service agreements

• 🛒 Order confirmations & in-store pickups

• 🚚 Proof of delivery & field-service reports

• 🧾 Invoices, receipts, authorizations

• 🏥 Patient consent forms & clinic intake

• 🏠 Rental/lease check-in & check-out

• 🧑‍💼 HR onboarding & internal approvals

• 🛠️ Support tickets & warranty claims

Keywords (one line, lowercase) 🔑

signature capture, signature pad, e-signature, digital signature, signature canvas, draw signature, base64 export, png export, jpg export, svg export, download button, thumbnail preview, stroke smoothing, pressure sensitivity, stylus support, undo redo, clear canvas, smart crop, trim whitespace, transparent background, watermark, timestamp, high dpi, responsive ui, offline friendly, upload to storage, form signing, proof of delivery, consent form, contract signing, flutter widget, flutterflow component, callbacks, onsave, onclear, accessible controls, theming, modern ui