How to use it
- Choose a pen colour, background and stroke width.
- Draw your signature with a mouse, trackpad, stylus or finger.
- Download the PNG and verify its appearance before placing it in a document.
Media & Files · Local-first · Beta
Digital Signature Draw & Sign
Draw a handwritten signature locally and download a transparent or solid-background PNG for documents and forms.
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Trust record
Check the method before you rely on the result
- Method
- Capture pointer strokes in a browser canvas and export the user-drawn mark without uploading or embedding it in a document.
- Signature PNG = pointer strokes + selected pen style + selected background
- Effective period
- Formula-based; no statutory effective period
- Last verified
- 10 August 2026
- Review every 365 days
- Reviewer status
- Product and domain review: specialist approval not required
- Privacy
- Inputs, generated content and local files stay in this browser. They are not sent to analytics, a backend, a URL or a log, and are not saved by default.
Important limitations
- The output is an image of a user-drawn mark, not a certificate-backed or cryptographic digital signature.
- The browser cannot confirm who drew the mark or whether a document was changed after signing.
Browse Media & Files · Methodology · Sources
A quick guide
Use the number with context
The answer is only useful when you know what it includes and what it leaves out.
Formula
Signature PNG = pointer strokes + selected pen style + selected background
The download is a visual signature asset. It does not provide identity verification, audit history or tamper evidence.
Make it concrete
Worked example
A signature drawn with a 3px teal stroke can be exported on a transparent background for placement over a PDF or invoice.
Boundaries
What this tool does not assume
Limitations
- The output is an image of a user-drawn mark, not a certificate-backed or cryptographic digital signature.
- The browser cannot confirm who drew the mark or whether a document was changed after signing.
Edge cases
- Transparent exports keep the background clear; use white or soft slate when a solid image is easier to place.
- Very short taps are preserved as rounded dots so a stylus or finger mark is not lost.
Last reviewed 10 August 2026 · Formula version 1.0
Method & sources
How this result is grounded
The formula is deterministic and runs in your browser. Read the reference below for the method used by this tool.
- Sharing and file utilities methodology v1
KarobarKit controlled methodology · authoritative reference · Checked 10 August 2026
Supports: payload escaping · file limits · safe decoded-content handling · local-only boundary
Questions
Frequently asked
Is this a legally verified digital signature?
No. It creates a local image of a handwritten mark. Use the signing and identity-verification process required for your document or jurisdiction.
Does my signature leave the browser?
No. Strokes remain in this page session and the PNG is generated locally when you download it.
Keep going
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Source register checked 10 August 2026.