Keeping personal user data safe client-side. The GDPR sets clear rules for protecting personal data. A major compliance issue comes from third-party tracking cookies, because they can monitor people without their consent. Server-side safeguards alone aren't enough: with so much happening in the browser today, you need client-side visibility and control at the client-side. cside delivers both and adds audit-ready reporting on top.
The General Data Protection Regulation defines people's rights and organization's accountability when collecting and using personal data. If you process the personal data of individuals in the EU/EEA, the GDPR applies, wherever your organization is based. The goal is simple: users should be able to trust that their data is handled securely and respectfully.
Personal data, also Personally Identifiable Information (PII), is any information that identifies someone: name, address, photo, email address, IP address, device identifiers, biometrics, health details, payment data, etc. Third-party cookies count as personal data too because they can tie individuals to their behavior across websites. People can control that data: access it, correct it, understand how it's stored and used, and request deletion. The GDPR puts responsibility on organizations. They should collect only what's necessary, be transparent, and implement appropriate security measures. GDPR isn't a suggestion. Non-compliance or violations can lead to fines of up to €20 million or 4% of global annual turnover, whichever number is higher. Misuse of tracking tools such as third-party cookies is where GDPR fines make headlines.
Every organization must be able to demonstrate and prove compliance at any moment. Encryption and access control on the server-side are essential, but not sufficient.
Tracking pixels, marketing tags, analytics, and third-party scripts often collect data in user's browser. That's why client-side visibility and control, backed by monitoring, logging, and reporting are critical.
cside streamlines GDPR compliance. You see every scripts, not just the domains, that run in the browser. And on top of that, you monitor the data touched by scripts with instant alerts on violations. You get pre-execution control and forensic proof. Long story short: you have comprehensive control and audit-ready reports for incidents investigation or reviews.
Scripts are blocked until consent is granted. cside detects and intercepts third-party scripts before execution and blocks unauthorized data collection.
See which scripts run, what data is accessed and where it's sent. All records are logged with audit-ready reports in line with RoPA/DPIA.
Only collect adequate, relevant and necessary data: cside inspects payloads and prevents exfiltration of cookies and form data to unexpected endpoints. cside stops over-collection in real time.
cside tracks data transfers and shows you when the data leaves the EEA and can geo-restrict or reroute to compliant endpoints.
Catch exfiltration attempts, e.g. formjacking, in real time. Assess the impact right away with full script version history and request-level logs.
Here's what that looks like in the real world. A visitor clicks 'reject all cookies'. Without client-side controls, an analytics script still fires and reads the email field at checkout.
With cside, the proxy intercepts the script and keeps track of its actions. The event is logged, with script version, touched fields and endpoint.
Result: no unauthorized data collection or processing, plus a complete audit-ready log for review. All In line with the goal of GDPR: building trust with users and auditors.
Leading companies trust cside
Built for security teams who need visibility inside the browser, cside delivers proven defense against modern client-side attacks while supporting major compliance frameworks.
Visit our Trust Center
GDPR
SOC 2
PCI DSS
*This page describes product capabilities and how they may support your compliance program. It is not legal advice. Requirements vary by organization and jurisdiction.