Keras.js
Run Keras models in the browser with GPU support via WebGL 2.
- Status
- UnmaintainedNo commits in 2931 days.
- Last checked
- Checked · Oct 11, 2026
- License
- Open source
- Pricing
- Free tier · from $0
What it is
Keras.js allows developers to run machine learning models built with Keras directly within web browsers, leveraging WebGL 2 for GPU acceleration. This tool is essential for creating interactive and dynamic web applications that require real-time inference capabilities without server-side processing.
Keras.js stands out as a unique solution for running Keras models directly in web browsers, offering real-time inference with GPU acceleration via WebGL 2, which is not commonly available in other similar tools.
When it fits — and when it doesn’t
A good fit for
Developers building web applications that need to perform machine learning inference directly within the browser.
Educators and researchers who want to demonstrate neural network operations in real-time without server dependencies.
Look elsewhere if
Projects requiring high-performance GPU computations beyond what WebGL can provide.
Applications where model size or complexity exceeds the capabilities of client-side processing.
Known weaknesses
Each one links to the public issue, changelog or docs page it came from, where we have one.
- 01
Limited support for complex models and operations
Some advanced Keras layers and operations may not be fully supported or optimized in Keras.js
- 02
Performance can degrade on low-end devices
WebGL 2 performance varies widely depending on the device's GPU capabilities, leading to inconsistent inference times
- 03
Debugging and error handling are challenging in browser environment
Limited debugging tools and less mature error reporting compared to server-side environments
What it does well
Runs Keras models in the browser with GPU acceleration via WebGL 2.
Enables real-time inference directly on client devices.
Supports a wide range of model architectures and layers supported by Keras.
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 Keras.js
Setup steps, common gotchas and what to check after 30 days.
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