Frontend Frameworks

is-online

Check if the internet connection is up with this lightweight utility.

Status
Generally available
Last checked
Checked · Oct 11, 2026
License
Open source
Pricing
Free tier · from $0
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What it is

is-online provides a simple way to check for an active internet connection in your Node.js applications. It's useful for ensuring that network-dependent features only run when connectivity is available, enhancing user experience and reliability.

is-online stands out as a minimalist and dependency-free tool for checking internet connectivity in Node.js applications, making it ideal for projects that need simplicity without sacrificing functionality.

When it fits — and when it doesn’t

A good fit for

  • Developers building Node.js applications that require network checks for feature availability.

  • Teams needing a lightweight solution for checking internet connectivity without external dependencies.

Look elsewhere if

  • Projects requiring complex network diagnostics beyond simple connectivity checks.

  • Applications where the overhead of an additional library is undesirable, even if minimal.

Known weaknesses

Each one links to the public issue, changelog or docs page it came from, where we have one.

  1. 01

    Limited functionality for complex network scenarios

    is-online only checks basic internet connectivity and does not support advanced features like checking specific URLs or handling different types of network errors.

  2. 02

    No built-in retry mechanism

    The tool lacks a native retry mechanism for intermittent connection issues, which may require additional custom implementation by the user.

  3. 03

    Does not handle proxy configurations automatically

    In environments where proxies are used, is-online does not provide automatic handling or configuration options to ensure accurate connectivity checks.

What it does well

  • Lightweight and easy to integrate into Node.js projects.

  • Provides a simple API for checking internet connectivity.

  • No external dependencies, making it easy to use in various environments.

Pricing

Free tier
YesOpen source — free to use
Paid from
$0
Model
Flat rate
Enterprise plan
No

Pricing not independently confirmed — check the vendor’s page.

Performance benchmarks

How Fast Is It?

Set up is-online

Setup steps, common gotchas and what to check after 30 days.

Open the setup guide →