# szimek/signature_pad

HTML5 canvas based smooth signature drawing

Repository: https://github.com/szimek/signature_pad
Canonical: https://ross.abutalabs.com/products/signature_pad
Homepage: http://szimek.github.io/signature_pad/
Language: TypeScript
License: MIT
License Family: permissive
Topics: signature, signature-pad, canvas, javascript, drawing
Last push: 2026-08-12T14:31:42+00:00

## Health v2 (maintenance only)
Score: 97/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 97, release rhythm 95, longevity 100
- inputs: {"age_days": 4919, "days_push": 21, "days_rel": 33, "gap_med": 17, "n_releases_24m": 12}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 12022, forks 2172 (observed 2026-08-28T04:10:50.684133+00:00)

## What it is
Signature Pad is a zero-dependency JavaScript/TypeScript library for drawing smooth signatures on an HTML5 canvas using variable-width Bézier curve interpolation. It exports signatures as PNG, JPEG, or SVG data URLs and works in all modern desktop and mobile browsers.

## Use cases
- capture user signatures in web forms
- draw smooth handwritten signatures on a canvas
- let users sign documents in a mobile browser
- export a signature as PNG, JPEG, or SVG
- add undo/redo and erase to a signature pad
- embed an e-signature widget without external dependencies

## When to choose
- you need smooth, natural-looking signature capture in the browser
- you want a lightweight, dependency-free canvas drawing library
- you need multi-format signature export (PNG/JPEG/SVG)
- you must support both desktop and mobile touch input

## When to avoid
- you need legally binding e-signature workflows with audit trails
- you need freehand drawing beyond signatures, like sketching apps
- you need server-side signature rendering outside the browser

## Facets
- artifact type: library
- maturity: stable
- function: ui-components, image-processing
- domain: web-development, frontend
- platform: browser, cross-platform
- tags: signature-pad, html5-canvas, drawing, typescript, e-signature

## Member repositories
- szimek/signature_pad (main) score 97

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:10:50.684133+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-29T17:14:59.750413+00:00, confidence not recorded.
  - readme: https://github.com/szimek/signature_pad (fetched 2026-08-28T04:10:50.684133+00:00, sha 8a534e39bbb1)
  - homepage: http://szimek.github.io/signature_pad/ (fetched 2026-08-29T08:12:56.727139+00:00, sha 0bdd0bd842bb)
  - registry_npm: https://registry.npmjs.org/signature_pad (fetched 2026-08-29T08:12:56.736699+00:00, sha 79744440151d)
- Data as of 2026-08-30T08:39:29.467469+00:00.