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How to use the signature block

Learn everything you need to know to use the signature block in your forms.

When to use

Use the signature block to let your respondents draw a signature within your form. The respondent can draw a signature with mouse, pen or touch. When the signature is completed it will be confirmed and stored as an image in your results.

Screenshot of a signature block in Tripetto
Demonstration of a signature block.

How to use

Add a new block to your form and then select the question type Signature. You can now customize this block to your needs with the following features:


  • Text
    Use the Text feature for the name/title of this block.
  • Description
    Enable the Description feature to add a description to this block.
  • Help text
    Enable the Help text feature to add a help text to this block.


  • Color
    By default the signature is drawn in the main color of your styling. Enable the Color feature to overrule that color with a custom color for the signature ink. The signature will always be stored using black ink.
  • Size
    By default the signature drawing field is shown as medium sized. Enable the Size feature to choose what size the drawing field should have: Small, Medium or Large.


  • Required
    By default this block is not required to fill out by your respondents. Enable the Required feature to make this block required to fill out.
  • Visibility
    By default this block is visible in your form. Enable the Visibility feature to hide it for your respondents.
  • Alias
    By default the name/title of this block will be used in your dataset. Enable the Alias feature to use a different name in your dataset.
Screenshot of the form builder in Tripetto
Advanced settings of the signature block.


Each signature is stored in your dataset as an image with filename signature-YYYYMMDDHHMMSS.png. You can easily preview a signature in the results, or download a copy of the image.


Logic is important to make your forms smart and conversational. The signature block can work with the following branch conditions to help you with that:

Block conditions

  • Signed;
  • Not signed.

Evaluate conditions

Evaluate conditions are done with the signature file name, which is a fixed file name in this format: signature-YYYYMMDDHHMMSS.png.

  • Value matches your filter;
  • Value does not match your filter;
  • Value contains your filter;
  • Value does not contain your filter;
  • Value starts with your filter;
  • Value ends with your filter;
  • Value is empty;
  • Value is not empty.


When we mention your filter above, there are some different filters that you can use to make the right comparison:

  • Text - Compare with a fixed text that you enter;
  • Value - Compare with another block value entered in the form by a respondent (more info).


You can use the calculator block to perform calculations with given answers. For the signature block these calculations are done using the signature file name, which is a fixed file name in this format: signature-YYYYMMDDHHMMSS.png. The signature block supports the following calculation operations:

  • Compare - Compare a file name and output a value based on the result of the comparison;
  • Character count - Count the number of characters in a file name;
  • Word count - Count the number of words in a file name;
  • Line count - Count the number of lines in a file name;
  • Count occurrences - Count the number of occurrences of a certain text, character or regular expression in a file name;
  • Convert to number - Convert a file name to a number value.

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