Find the free tierthat fits your stack.

Sucuri SiteCheck

Sucuri SiteCheck is a remote website security scanner that checks a URL from the browser side for known malware, viruses, blacklisting status, website errors, out-of-date software, malicious code, red...

Internet.nl

Internet.nl is a web-based test tool that checks whether a website, email domain, or internet connection uses modern Internet standards. It runs tests for IPv6, DNSSEC, HTTPS, DMARC, STARTTLS, DANE, and related standards, then reports the results for the entered domain or address.

Ethereal Email

Ethereal Email is a fake SMTP service for testing outbound email. Developers can create a throwaway SMTP account with Nodemailer or manually, send messages to smtp.ethereal.email, and preview the captured mail through a public message URL or by reading it back over IMAP/POP3.

UserCheck

UserCheck is an email validation API that checks addresses and domains for disposable mail providers, forwarding services, public email domains, role accounts, MX record validity, syntax errors, and c...

FXRatesAPI

FXRatesAPI is a currency conversion and exchange rates API that provides programmatic access to latest, historical, timeseries, and conversion data. The service exposes endpoints for supported currenc...

DB Designer

DB Designer is an online database schema design and modeling tool. It lets users create ER diagrams in the browser, import existing databases, and generate SQL scripts for MySQL, MSSQL, PostgreSQL, Oracle, and SQLite.

Form.taxi

Form.taxi is a hosted form backend for receiving online form submissions without custom server code. It handles submission storage, spam filtering, email notifications, and an admin panel for reviewing inbox entries and adjusting submission settings.

Tesults

Tesults is a test automation reporting and case management service for engineering teams. It collects automated test results from CI pipelines and test frameworks, then presents run history, failure analysis, logs, screenshots, and related files in a dashboard and API.

Gleek

Gleek is a text-to-diagram tool for developers that generates diagrams from a keyboard-driven syntax, including flowcharts, UML class and sequence diagrams, state machine diagrams, object diagrams, Gantt charts, and ER diagrams.