Frontend Frameworks

duplexify

Turns writeable and readable streams into a single duplex stream.

Status
UnmaintainedNo commits in 803 days.
Last checked
Checked · Oct 8, 2026
License
Open source
Pricing
Free tier · from $0
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What it is

Duplexify is a Node.js library that allows developers to combine two separate streams, one writable and the other readable, into a single duplex stream. This simplifies handling of complex data flows in applications using Node.js streams.

Duplexify stands out as a lightweight and efficient solution for combining writable and readable streams into a single duplex stream, offering simplicity in managing complex data flows within Node.js applications.

When it fits — and when it doesn’t

A good fit for

  • Node.js developers who need to manage complex data flows involving both input and output streams.

  • Projects requiring the integration of multiple streaming components into a single, unified interface.

Look elsewhere if

  • Developers working with non-Node.js environments where stream handling is not required.

  • Applications that do not involve complex data flow management or require simpler stream operations.

Known weaknesses

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

  1. 01

    Limited documentation and examples

    The official documentation lacks detailed usage scenarios and practical examples for complex stream operations.

  2. 02

    Narrow focus limits versatility

    Duplexify is specifically tailored to work with Node.js streams, limiting its application in broader contexts or with other data handling libraries.

  3. 03

    Small community and slow issue resolution

    The project has a relatively small contributor base which can lead to slower response times for bug fixes and feature requests.

What it does well

  • Combines writable and readable streams into a single duplex stream.

  • Simplifies complex data flow management in Node.js applications.

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 duplexify

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

Open the setup guide →