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Free Signature Pad Web App – Save to Google Sheets

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How to Build a Signature Pad Web App & Save to Google Sheets | R9
You get
  • Google Sheet link
  • Source code file
  • Resale rights
  • Edit rights
  • Setup guide
  • AI setup help

Key Features

Drawn signature captured on the form Signature saved to Google Sheets with the record Unique submission ID generated per entry ID shown back to the user and copyable Name email phone gender city and date fields Required-field validation with action-required messages Timestamp recorded with every submission Random background image on each load Background can be fixed instead of random Title and subtitle editable in the code Bootstrap-styled layout X-Frame-Options set to allow embedding Embeddable in any website by iframe

Description

A form that takes a signature. The person fills in their details, signs with a finger or a mouse, and the signature is stored in your Google Sheet alongside everything else they entered.

Why a drawn signature matters

A typed name is a claim; a drawn signature is a mark the person made. For consent forms, delivery acknowledgements, attendance at a session, policy sign-off or a service handover, the difference is what makes the record worth keeping. Here the pad sits in the form itself, works on a touchscreen as well as a mouse, and the captured signature goes into the sheet with the submission.

Every submission gets an ID

On submit the person is thanked and shown a unique ID for their entry, which they can copy. That gives them a reference to quote and gives you a key to find the record — without anyone having to search by name and date and hope there is only one match.

Nothing incomplete gets through

Required fields are enforced with an action-required message against whatever is missing, so a signed form with no phone number does not reach the sheet. The field rules are set in the code, so you can adjust which fields are mandatory for your own use.

Presentation and placement

The form carries a background image that changes on each load — or can be fixed to one image if you would rather it stayed consistent with your branding. The title and subtitle are editable, the layout uses Bootstrap, and frame embedding is allowed so it drops into your own website by iframe rather than living on a Google URL.

Requirements

  • A Google account (Gmail or Google Workspace)
  • Google Sheets and Google Apps Script — no hosting or server needed
  • A responses sheet whose name matches the one set in the script
  • A touchscreen or mouse for signing
  • A website to embed the form in (optional)

What's Included

  • Complete Google Apps Script source code
  • Form with a drawable signature pad
  • Signature saved into Google Sheets with the record
  • Unique submission ID returned to the user
  • Required-field validation with configurable rules
  • Editable title, subtitle and background behaviour
  • iframe embedding for any website
  • Google Sheet structure for the submissions
  • Step-by-step video walkthrough of the full build
  • Free support from the developer

Item Details

Versionv1.0
PublishedAug 22, 2025
PlatformGoogle Apps Script
DatabaseGoogle Sheets
CategoryForms & Data Entry, CRUD & Dashboards
Tagssignature pad web appsignature pad google sheetscapture signature google sheetsdigital signature formhtml signature pade signature apps scriptconsent form with signaturesign and submit web form
VideoWatch walkthrough
LicenseRegular License
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What you get

  • Code.gs + HTML filesThe complete Apps Script project
  • Google SheetYour own copy with the data
  • Setup guideInstall steps from start to finish

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Reviews & Feedback

What buyers and viewers say about How to Build a Signature Pad Web App & Save to Google Sheets | R9.

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@Nakato124 via YouTube
This one ins the best free signature form I've seen.
1 like on YouTube
@aditya12349 via YouTube
Very nice tutorial, is it possible to add this to an already published google form. I'm very new to scripts and trying to learn.☺️
@thevendra8119 via YouTube
Amazing I want source code but I don’t have WhatsApp
@makelifeeasy1917 via YouTube
nice video, paid code hai keya ?
@krishnanmanoj1 via YouTube
Amazing❤🎉😊