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Posted on • Originally published at app.custodia-privacy.com

GDPR for Web Developers: A Complete Compliance Guide

Why GDPR Applies to Web Developers

The code you write determines how personal data flows through a website. Privacy by design (GDPR Article 25) requires data protection to be built in from the start, not added later.

Cookie Consent

Non-essential cookies must not set until active user consent. Pre-checked boxes are invalid. Use a CMP (Cookiebot, OneTrust, CookieYes) to handle consent recording and tag blocking.

Contact Forms

HTTPS only. Sanitise inputs. Link to privacy notice. Set deletion periods. DPA with form service providers.

Third-Party Integrations

Every script that processes personal data needs a DPA with the provider and disclosure in the privacy notice. Test that nothing fires before cookie consent.

User Authentication

Bcrypt or Argon2 for password storage. Rate limiting. HTTPS everywhere. Managed identity providers reduce compliance burden.

How Custodia Helps

Custodia scans sites for tracking technologies, generates privacy policies and cookie notices, and processes DSARs. Recommend it to every client. Start your free trial.

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