Privacy-focused browser and email tools

Cleaner digital workflows, with less unnecessary exposure.

Cevr builds lightweight browser and email tools for people who want cleaner control over identity, privacy, and everyday web workflows.

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Practical privacy is not about slogans. It is about reducing manual work, minimizing needless data collection, and giving users more control over the tools they already use.

First product

Fastmail Masked Mail Chromium Extension

Built for Fastmail users who want lower-friction masked email creation in everyday browser workflows.

In development Chromium extension

Generate and insert masked email aliases directly from your browser.

A privacy-focused extension for Fastmail users who want faster alias creation during signups, account migrations, and identity compartmentalization.

Generate Fastmail Masked Mail aliases through the Fastmail API.
Insert new aliases from the browser context menu.
Use masked addresses in forms, chats, notes, and editable fields.
Store configuration locally in the browser extension environment.
No Cevr account or backend service required in the current design.

Operating principles

Small by design

Tools should solve specific workflow problems without becoming platforms.

Local-first where practical

Prefer local configuration and client-side workflows when a backend is not necessary.

Clear limitations

Security and privacy claims should be specific, testable, and not overstated.

Control over lock-in

Build around open workflows, user-owned domains, and portable digital infrastructure.

Focus areas

Email identity

Tools for masked mail, aliases, custom domains, and account migration workflows.

Browser utilities

Small extensions and context actions that reduce repetitive manual steps.

Account workflows

Utilities for users who manage aliases, domains, signups, and account migration.

Privacy posture

Minimal collection. Practical defaults.

Cevr products are designed to avoid unnecessary accounts, analytics, and server-side dependency unless a product clearly requires them.

The Fastmail Masked Mail extension is currently designed to use the Fastmail API directly from the browser extension environment. Users should create dedicated API tokens with the minimum required permissions and revoke them when no longer needed.