Hidden fields for custom signup forms

Automatically populate HTML hidden inputs in your signup and login forms. Collect users data from cookies, UTMs, and URL parameters without effort.

Hidden fields for custom signup forms
Mutua Madrileña

How it works

Hidden fields features

Set hidden fields via URL params

Fill hidden fields with data from a URL and add any parameter you'd like to track. Pass hidden fields both with UTMs and your own URL parameters to track the user's itinerary, campaign details, etc. and any information you'd like to see in your submissions.

JavaScript method to set values

Use our JavaScript SDK method to set hidden field values programmatically. This will give you the flexibility to set values, at any moment, in the form lifecycle: when the user continues to the next step, when information is available in your site, etc.

Other popular features

Discover what use cases you can build with Arengu

Security and privacy by default

We help you comply with your security and privacy policies. You decide where you want to store the information you collect, and who has access to it.

SOC 2 certified

Monitored by a 3rd party to stay compliant with SOC 2 security standards.

GDPR compliant

Full control of your data to help you comply with your privacy policies.

Hosted in the EU

Servers and data are securely hosted in the European Union.

Encrypted data

Data is stored encrypted using the AES256 algorithm.

Learn more about security

Out of the box integrations

Send your data back and forth between Arengu and your favourite apps.

Getting started with Arengu

Arengu allows you to build all your user flows connected to your current stack, and avoids coding all the UI, complex integrations, validations or logic from scratch. Try it for free and start building faster and scaling your application needs as they grow.